The Experts below are selected from a list of 25890 Experts worldwide ranked by ideXlab platform
Zhan Chen - One of the best experts on this subject based on the ideXlab platform.
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Headgroup effect on silane structures at buried polymer/silane and polymer/polymer interfaces and their relations to adhesion.
Langmuir, 2012Co-Authors: Chi Zhang, Nick Evan Shephard, Susan M. Rhodes, Zhan ChenAbstract:Sum frequency generation (SFG) vibrational spectroscopy was used to study the effect of silane Headgroups on the molecular interactions that occur between poly(ethylene terephthalate) (PET) and various epoxy silanes at the PET/silane and PET/silicone interfaces. Three different silanes were investigated: (3-glycidoxypropyl) trimethoxysilane (γ-GPS), (3-glycidoxypropyl) methyl-dimethoxysilane (γ-GPMS), and (3-glycidoxypropyl) dimethyl-methoxysilane (γ-GPDMS). These silanes share the same backbone and epoxy end group but have different Headgroups. SFG was used to examine the interfaces between PET and each of these silanes, as well as silanes mixed with methylvinylsiloxanol (MVS). We also examined the interfaces between PET and uncured or cured silicone with silanes or silane–MVS mixtures. Silanes with different Headgroups were found to exhibit a variety of methoxy group interfacial segregation and ordering behaviors at various interfaces. The effect of MVS was also dependent upon silane Headgroup choice, a...
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Headgroup effect on silane structures at buried polymer/silane and polymer/polymer interfaces and their relations to adhesion
Langmuir : the ACS journal of surfaces and colloids, 2012Co-Authors: Chi Zhang, Nick Evan Shephard, Susan M. Rhodes, Zhan ChenAbstract:Sum frequency generation (SFG) vibrational spectroscopy was used to study the effect of silane Headgroups on the molecular interactions that occur between poly(ethylene terephthalate) (PET) and various epoxy silanes at the PET/silane and PET/silicone interfaces. Three different silanes were investigated: (3-glycidoxypropyl) trimethoxysilane (γ-GPS), (3-glycidoxypropyl) methyl-dimethoxysilane (γ-GPMS), and (3-glycidoxypropyl) dimethyl-methoxysilane (γ-GPDMS). These silanes share the same backbone and epoxy end group but have different Headgroups. SFG was used to examine the interfaces between PET and each of these silanes, as well as silanes mixed with methylvinylsiloxanol (MVS). We also examined the interfaces between PET and uncured or cured silicone with silanes or silane-MVS mixtures. Silanes with different Headgroups were found to exhibit a variety of methoxy group interfacial segregation and ordering behaviors at various interfaces. The effect of MVS was also dependent upon silane Headgroup choice, and the interfacial molecular structures of silane methoxy Headgroups were found to differ at PET/silane and PET/silicone interfaces. Epoxy silanes have been widely used as adhesion promoters for polymer adhesives; therefore, the molecular structures probed using SFG were correlated to adhesion testing results to understand the molecular mechanisms of silicone-polymer adhesion. Our results demonstrated that silane methoxy Headgroups play important roles in adhesion at the PET/silicone interfaces. The presence of MVS can change interfacial methoxy segregation and ordering, leading to different adhesion strengths.
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Headgroup effect on silane structures at buried polymer silane and polymer polymer interfaces and their relations to adhesion
Langmuir, 2012Co-Authors: Chi Zhang, Nick Evan Shephard, Susan M. Rhodes, Zhan ChenAbstract:Sum frequency generation (SFG) vibrational spectroscopy was used to study the effect of silane Headgroups on the molecular interactions that occur between poly(ethylene terephthalate) (PET) and various epoxy silanes at the PET/silane and PET/silicone interfaces. Three different silanes were investigated: (3-glycidoxypropyl) trimethoxysilane (γ-GPS), (3-glycidoxypropyl) methyl-dimethoxysilane (γ-GPMS), and (3-glycidoxypropyl) dimethyl-methoxysilane (γ-GPDMS). These silanes share the same backbone and epoxy end group but have different Headgroups. SFG was used to examine the interfaces between PET and each of these silanes, as well as silanes mixed with methylvinylsiloxanol (MVS). We also examined the interfaces between PET and uncured or cured silicone with silanes or silane-MVS mixtures. Silanes with different Headgroups were found to exhibit a variety of methoxy group interfacial segregation and ordering behaviors at various interfaces. The effect of MVS was also dependent upon silane Headgroup choice, and the interfacial molecular structures of silane methoxy Headgroups were found to differ at PET/silane and PET/silicone interfaces. Epoxy silanes have been widely used as adhesion promoters for polymer adhesives; therefore, the molecular structures probed using SFG were correlated to adhesion testing results to understand the molecular mechanisms of silicone-polymer adhesion. Our results demonstrated that silane methoxy Headgroups play important roles in adhesion at the PET/silicone interfaces. The presence of MVS can change interfacial methoxy segregation and ordering, leading to different adhesion strengths.
Chi Zhang - One of the best experts on this subject based on the ideXlab platform.
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Headgroup effect on silane structures at buried polymer/silane and polymer/polymer interfaces and their relations to adhesion.
Langmuir, 2012Co-Authors: Chi Zhang, Nick Evan Shephard, Susan M. Rhodes, Zhan ChenAbstract:Sum frequency generation (SFG) vibrational spectroscopy was used to study the effect of silane Headgroups on the molecular interactions that occur between poly(ethylene terephthalate) (PET) and various epoxy silanes at the PET/silane and PET/silicone interfaces. Three different silanes were investigated: (3-glycidoxypropyl) trimethoxysilane (γ-GPS), (3-glycidoxypropyl) methyl-dimethoxysilane (γ-GPMS), and (3-glycidoxypropyl) dimethyl-methoxysilane (γ-GPDMS). These silanes share the same backbone and epoxy end group but have different Headgroups. SFG was used to examine the interfaces between PET and each of these silanes, as well as silanes mixed with methylvinylsiloxanol (MVS). We also examined the interfaces between PET and uncured or cured silicone with silanes or silane–MVS mixtures. Silanes with different Headgroups were found to exhibit a variety of methoxy group interfacial segregation and ordering behaviors at various interfaces. The effect of MVS was also dependent upon silane Headgroup choice, a...
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Headgroup effect on silane structures at buried polymer/silane and polymer/polymer interfaces and their relations to adhesion
Langmuir : the ACS journal of surfaces and colloids, 2012Co-Authors: Chi Zhang, Nick Evan Shephard, Susan M. Rhodes, Zhan ChenAbstract:Sum frequency generation (SFG) vibrational spectroscopy was used to study the effect of silane Headgroups on the molecular interactions that occur between poly(ethylene terephthalate) (PET) and various epoxy silanes at the PET/silane and PET/silicone interfaces. Three different silanes were investigated: (3-glycidoxypropyl) trimethoxysilane (γ-GPS), (3-glycidoxypropyl) methyl-dimethoxysilane (γ-GPMS), and (3-glycidoxypropyl) dimethyl-methoxysilane (γ-GPDMS). These silanes share the same backbone and epoxy end group but have different Headgroups. SFG was used to examine the interfaces between PET and each of these silanes, as well as silanes mixed with methylvinylsiloxanol (MVS). We also examined the interfaces between PET and uncured or cured silicone with silanes or silane-MVS mixtures. Silanes with different Headgroups were found to exhibit a variety of methoxy group interfacial segregation and ordering behaviors at various interfaces. The effect of MVS was also dependent upon silane Headgroup choice, and the interfacial molecular structures of silane methoxy Headgroups were found to differ at PET/silane and PET/silicone interfaces. Epoxy silanes have been widely used as adhesion promoters for polymer adhesives; therefore, the molecular structures probed using SFG were correlated to adhesion testing results to understand the molecular mechanisms of silicone-polymer adhesion. Our results demonstrated that silane methoxy Headgroups play important roles in adhesion at the PET/silicone interfaces. The presence of MVS can change interfacial methoxy segregation and ordering, leading to different adhesion strengths.
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Headgroup effect on silane structures at buried polymer silane and polymer polymer interfaces and their relations to adhesion
Langmuir, 2012Co-Authors: Chi Zhang, Nick Evan Shephard, Susan M. Rhodes, Zhan ChenAbstract:Sum frequency generation (SFG) vibrational spectroscopy was used to study the effect of silane Headgroups on the molecular interactions that occur between poly(ethylene terephthalate) (PET) and various epoxy silanes at the PET/silane and PET/silicone interfaces. Three different silanes were investigated: (3-glycidoxypropyl) trimethoxysilane (γ-GPS), (3-glycidoxypropyl) methyl-dimethoxysilane (γ-GPMS), and (3-glycidoxypropyl) dimethyl-methoxysilane (γ-GPDMS). These silanes share the same backbone and epoxy end group but have different Headgroups. SFG was used to examine the interfaces between PET and each of these silanes, as well as silanes mixed with methylvinylsiloxanol (MVS). We also examined the interfaces between PET and uncured or cured silicone with silanes or silane-MVS mixtures. Silanes with different Headgroups were found to exhibit a variety of methoxy group interfacial segregation and ordering behaviors at various interfaces. The effect of MVS was also dependent upon silane Headgroup choice, and the interfacial molecular structures of silane methoxy Headgroups were found to differ at PET/silane and PET/silicone interfaces. Epoxy silanes have been widely used as adhesion promoters for polymer adhesives; therefore, the molecular structures probed using SFG were correlated to adhesion testing results to understand the molecular mechanisms of silicone-polymer adhesion. Our results demonstrated that silane methoxy Headgroups play important roles in adhesion at the PET/silicone interfaces. The presence of MVS can change interfacial methoxy segregation and ordering, leading to different adhesion strengths.
Ana-nicoleta Bondar - One of the best experts on this subject based on the ideXlab platform.
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Mechanisms by Which Lipids Influence Conformational Dynamics of the GlpG Intramembrane Protease.
The journal of physical chemistry. B, 2019Co-Authors: Ana-nicoleta BondarAbstract:Rhomboid intramembrane proteases are bound to lipid membranes, where they dock and cleave other transmembrane substrates. How the lipid membrane surrounding the protease impacts the conformational dynamics of the protease is essential to understand because it informs on the reaction coordinate of substrate binding. Atomistic molecular dynamics simulations allow us to probe protein motions and characterize the coupling between protein and lipids. Simulations performed here on GlpG, the rhomboid protease from Escherichia coli, indicate that the thickness of the lipid membrane close to GlpG depends on both the composition of the lipid membrane and the conformation of GlpG. Transient binding of a lipid Headgroup at the active site of the protease, as observed in some of the simulations reported here, suggests that a lipid Headgroup might compete with the substrate for access to the GlpG active site. Interactions identified between lipid Headgroups and the protein influence the dynamics of lipid interactions close to the substrate-binding site. These observations suggest that the lipid membrane environment shapes the energy profile of the substrate-docking region of the enzyme reaction coordinate.
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Mechanisms by Which Lipids Influence Conformational Dynamics of the GlpG Intramembrane Protease
2019Co-Authors: Ana-nicoleta BondarAbstract:Rhomboid intramembrane proteases are bound to lipid membranes, where they dock and cleave other transmembrane substrates. How the lipid membrane surrounding the protease impacts the conformational dynamics of the protease is essential to understand because it informs on the reaction coordinate of substrate binding. Atomistic molecular dynamics simulations allow us to probe protein motions and characterize the coupling between protein and lipids. Simulations performed here on GlpG, the rhomboid protease from Escherichia coli, indicate that the thickness of the lipid membrane close to GlpG depends on both the composition of the lipid membrane and the conformation of GlpG. Transient binding of a lipid Headgroup at the active site of the protease, as observed in some of the simulations reported here, suggests that a lipid Headgroup might compete with the substrate for access to the GlpG active site. Interactions identified between lipid Headgroups and the protein influence the dynamics of lipid interactions close to the substrate-binding site. These observations suggest that the lipid membrane environment shapes the energy profile of the substrate-docking region of the enzyme reaction coordinate
Susan M. Rhodes - One of the best experts on this subject based on the ideXlab platform.
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Headgroup effect on silane structures at buried polymer/silane and polymer/polymer interfaces and their relations to adhesion.
Langmuir, 2012Co-Authors: Chi Zhang, Nick Evan Shephard, Susan M. Rhodes, Zhan ChenAbstract:Sum frequency generation (SFG) vibrational spectroscopy was used to study the effect of silane Headgroups on the molecular interactions that occur between poly(ethylene terephthalate) (PET) and various epoxy silanes at the PET/silane and PET/silicone interfaces. Three different silanes were investigated: (3-glycidoxypropyl) trimethoxysilane (γ-GPS), (3-glycidoxypropyl) methyl-dimethoxysilane (γ-GPMS), and (3-glycidoxypropyl) dimethyl-methoxysilane (γ-GPDMS). These silanes share the same backbone and epoxy end group but have different Headgroups. SFG was used to examine the interfaces between PET and each of these silanes, as well as silanes mixed with methylvinylsiloxanol (MVS). We also examined the interfaces between PET and uncured or cured silicone with silanes or silane–MVS mixtures. Silanes with different Headgroups were found to exhibit a variety of methoxy group interfacial segregation and ordering behaviors at various interfaces. The effect of MVS was also dependent upon silane Headgroup choice, a...
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Headgroup effect on silane structures at buried polymer/silane and polymer/polymer interfaces and their relations to adhesion
Langmuir : the ACS journal of surfaces and colloids, 2012Co-Authors: Chi Zhang, Nick Evan Shephard, Susan M. Rhodes, Zhan ChenAbstract:Sum frequency generation (SFG) vibrational spectroscopy was used to study the effect of silane Headgroups on the molecular interactions that occur between poly(ethylene terephthalate) (PET) and various epoxy silanes at the PET/silane and PET/silicone interfaces. Three different silanes were investigated: (3-glycidoxypropyl) trimethoxysilane (γ-GPS), (3-glycidoxypropyl) methyl-dimethoxysilane (γ-GPMS), and (3-glycidoxypropyl) dimethyl-methoxysilane (γ-GPDMS). These silanes share the same backbone and epoxy end group but have different Headgroups. SFG was used to examine the interfaces between PET and each of these silanes, as well as silanes mixed with methylvinylsiloxanol (MVS). We also examined the interfaces between PET and uncured or cured silicone with silanes or silane-MVS mixtures. Silanes with different Headgroups were found to exhibit a variety of methoxy group interfacial segregation and ordering behaviors at various interfaces. The effect of MVS was also dependent upon silane Headgroup choice, and the interfacial molecular structures of silane methoxy Headgroups were found to differ at PET/silane and PET/silicone interfaces. Epoxy silanes have been widely used as adhesion promoters for polymer adhesives; therefore, the molecular structures probed using SFG were correlated to adhesion testing results to understand the molecular mechanisms of silicone-polymer adhesion. Our results demonstrated that silane methoxy Headgroups play important roles in adhesion at the PET/silicone interfaces. The presence of MVS can change interfacial methoxy segregation and ordering, leading to different adhesion strengths.
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Headgroup effect on silane structures at buried polymer silane and polymer polymer interfaces and their relations to adhesion
Langmuir, 2012Co-Authors: Chi Zhang, Nick Evan Shephard, Susan M. Rhodes, Zhan ChenAbstract:Sum frequency generation (SFG) vibrational spectroscopy was used to study the effect of silane Headgroups on the molecular interactions that occur between poly(ethylene terephthalate) (PET) and various epoxy silanes at the PET/silane and PET/silicone interfaces. Three different silanes were investigated: (3-glycidoxypropyl) trimethoxysilane (γ-GPS), (3-glycidoxypropyl) methyl-dimethoxysilane (γ-GPMS), and (3-glycidoxypropyl) dimethyl-methoxysilane (γ-GPDMS). These silanes share the same backbone and epoxy end group but have different Headgroups. SFG was used to examine the interfaces between PET and each of these silanes, as well as silanes mixed with methylvinylsiloxanol (MVS). We also examined the interfaces between PET and uncured or cured silicone with silanes or silane-MVS mixtures. Silanes with different Headgroups were found to exhibit a variety of methoxy group interfacial segregation and ordering behaviors at various interfaces. The effect of MVS was also dependent upon silane Headgroup choice, and the interfacial molecular structures of silane methoxy Headgroups were found to differ at PET/silane and PET/silicone interfaces. Epoxy silanes have been widely used as adhesion promoters for polymer adhesives; therefore, the molecular structures probed using SFG were correlated to adhesion testing results to understand the molecular mechanisms of silicone-polymer adhesion. Our results demonstrated that silane methoxy Headgroups play important roles in adhesion at the PET/silicone interfaces. The presence of MVS can change interfacial methoxy segregation and ordering, leading to different adhesion strengths.
Nick Evan Shephard - One of the best experts on this subject based on the ideXlab platform.
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Headgroup effect on silane structures at buried polymer/silane and polymer/polymer interfaces and their relations to adhesion.
Langmuir, 2012Co-Authors: Chi Zhang, Nick Evan Shephard, Susan M. Rhodes, Zhan ChenAbstract:Sum frequency generation (SFG) vibrational spectroscopy was used to study the effect of silane Headgroups on the molecular interactions that occur between poly(ethylene terephthalate) (PET) and various epoxy silanes at the PET/silane and PET/silicone interfaces. Three different silanes were investigated: (3-glycidoxypropyl) trimethoxysilane (γ-GPS), (3-glycidoxypropyl) methyl-dimethoxysilane (γ-GPMS), and (3-glycidoxypropyl) dimethyl-methoxysilane (γ-GPDMS). These silanes share the same backbone and epoxy end group but have different Headgroups. SFG was used to examine the interfaces between PET and each of these silanes, as well as silanes mixed with methylvinylsiloxanol (MVS). We also examined the interfaces between PET and uncured or cured silicone with silanes or silane–MVS mixtures. Silanes with different Headgroups were found to exhibit a variety of methoxy group interfacial segregation and ordering behaviors at various interfaces. The effect of MVS was also dependent upon silane Headgroup choice, a...
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Headgroup effect on silane structures at buried polymer/silane and polymer/polymer interfaces and their relations to adhesion
Langmuir : the ACS journal of surfaces and colloids, 2012Co-Authors: Chi Zhang, Nick Evan Shephard, Susan M. Rhodes, Zhan ChenAbstract:Sum frequency generation (SFG) vibrational spectroscopy was used to study the effect of silane Headgroups on the molecular interactions that occur between poly(ethylene terephthalate) (PET) and various epoxy silanes at the PET/silane and PET/silicone interfaces. Three different silanes were investigated: (3-glycidoxypropyl) trimethoxysilane (γ-GPS), (3-glycidoxypropyl) methyl-dimethoxysilane (γ-GPMS), and (3-glycidoxypropyl) dimethyl-methoxysilane (γ-GPDMS). These silanes share the same backbone and epoxy end group but have different Headgroups. SFG was used to examine the interfaces between PET and each of these silanes, as well as silanes mixed with methylvinylsiloxanol (MVS). We also examined the interfaces between PET and uncured or cured silicone with silanes or silane-MVS mixtures. Silanes with different Headgroups were found to exhibit a variety of methoxy group interfacial segregation and ordering behaviors at various interfaces. The effect of MVS was also dependent upon silane Headgroup choice, and the interfacial molecular structures of silane methoxy Headgroups were found to differ at PET/silane and PET/silicone interfaces. Epoxy silanes have been widely used as adhesion promoters for polymer adhesives; therefore, the molecular structures probed using SFG were correlated to adhesion testing results to understand the molecular mechanisms of silicone-polymer adhesion. Our results demonstrated that silane methoxy Headgroups play important roles in adhesion at the PET/silicone interfaces. The presence of MVS can change interfacial methoxy segregation and ordering, leading to different adhesion strengths.
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Headgroup effect on silane structures at buried polymer silane and polymer polymer interfaces and their relations to adhesion
Langmuir, 2012Co-Authors: Chi Zhang, Nick Evan Shephard, Susan M. Rhodes, Zhan ChenAbstract:Sum frequency generation (SFG) vibrational spectroscopy was used to study the effect of silane Headgroups on the molecular interactions that occur between poly(ethylene terephthalate) (PET) and various epoxy silanes at the PET/silane and PET/silicone interfaces. Three different silanes were investigated: (3-glycidoxypropyl) trimethoxysilane (γ-GPS), (3-glycidoxypropyl) methyl-dimethoxysilane (γ-GPMS), and (3-glycidoxypropyl) dimethyl-methoxysilane (γ-GPDMS). These silanes share the same backbone and epoxy end group but have different Headgroups. SFG was used to examine the interfaces between PET and each of these silanes, as well as silanes mixed with methylvinylsiloxanol (MVS). We also examined the interfaces between PET and uncured or cured silicone with silanes or silane-MVS mixtures. Silanes with different Headgroups were found to exhibit a variety of methoxy group interfacial segregation and ordering behaviors at various interfaces. The effect of MVS was also dependent upon silane Headgroup choice, and the interfacial molecular structures of silane methoxy Headgroups were found to differ at PET/silane and PET/silicone interfaces. Epoxy silanes have been widely used as adhesion promoters for polymer adhesives; therefore, the molecular structures probed using SFG were correlated to adhesion testing results to understand the molecular mechanisms of silicone-polymer adhesion. Our results demonstrated that silane methoxy Headgroups play important roles in adhesion at the PET/silicone interfaces. The presence of MVS can change interfacial methoxy segregation and ordering, leading to different adhesion strengths.
