The Experts below are selected from a list of 237 Experts worldwide ranked by ideXlab platform
Yuan Hu - One of the best experts on this subject based on the ideXlab platform.
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synthesis of a novel sulfur bearing Secondary Antioxidant with a high molecular weight and its comparative study on Antioxidant behavior in polypropylene with two commercial sulfur bearing Secondary Antioxidants having relatively low molecular weight
Polymer Degradation and Stability, 2013Co-Authors: Xiaofeng Wang, Weiyi Xing, Gang Tang, Ningning Hong, Weizhao Hu, Jing Zhan, Lei Song, Wei Yang, Yuan HuAbstract:Abstract A novel sulfur-bearing Secondary Antioxidant with a high molecular weight of 2252 (OS-POSS), successfully synthesized via photoinitiated thiol-ene click reaction, was compared with two commercial sulfur-bearing Secondary Antioxidants on the stabilization of polypropylene (PP). The results of their oxidation induction time (OIT) via differential scanning calorimeter measurement (DSC) showed that the higher the molecular weight of Secondary Antioxidant is, the longer the OIT value, whether such sulfur-bearing Antioxidant is used singly or in combination with primary Antioxidant. The study of their long-term accelerated thermal aging in the air oven at 150 °C displayed that the molecular structure of sulfur-bearing Secondary Antioxidant, besides molecular weight, is another highly important factor determining the Antioxidant efficiency, i.e., physical loss of Antioxidants with the relatively low molecular weight may determine Antioxidant efficiency, whereas thioether groups having neighboring ester carbonyl moieties may decompose more hydroperoxides with quicker rate.
Xiaofeng Wang - One of the best experts on this subject based on the ideXlab platform.
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synthesis of a novel sulfur bearing Secondary Antioxidant with a high molecular weight and its comparative study on Antioxidant behavior in polypropylene with two commercial sulfur bearing Secondary Antioxidants having relatively low molecular weight
Polymer Degradation and Stability, 2013Co-Authors: Xiaofeng Wang, Weiyi Xing, Gang Tang, Ningning Hong, Weizhao Hu, Jing Zhan, Lei Song, Wei Yang, Yuan HuAbstract:Abstract A novel sulfur-bearing Secondary Antioxidant with a high molecular weight of 2252 (OS-POSS), successfully synthesized via photoinitiated thiol-ene click reaction, was compared with two commercial sulfur-bearing Secondary Antioxidants on the stabilization of polypropylene (PP). The results of their oxidation induction time (OIT) via differential scanning calorimeter measurement (DSC) showed that the higher the molecular weight of Secondary Antioxidant is, the longer the OIT value, whether such sulfur-bearing Antioxidant is used singly or in combination with primary Antioxidant. The study of their long-term accelerated thermal aging in the air oven at 150 °C displayed that the molecular structure of sulfur-bearing Secondary Antioxidant, besides molecular weight, is another highly important factor determining the Antioxidant efficiency, i.e., physical loss of Antioxidants with the relatively low molecular weight may determine Antioxidant efficiency, whereas thioether groups having neighboring ester carbonyl moieties may decompose more hydroperoxides with quicker rate.
Bharat I Chaudhary - One of the best experts on this subject based on the ideXlab platform.
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110th anniversary interactions of bis 1 methyl 1 phenylethyl peroxide with the Secondary Antioxidant bis octadecyloxycarbonylethyl sulfide mechanistic studies conducted in dodecane as a model system for polyethylene
Industrial & Engineering Chemistry Research, 2019Co-Authors: Sarath Chand Sarngadharan, Fiaz S Mohammed, Mark Conley, Harris Eldridge, Yusra Anwar, Derek Nursey, Jon Faris, Maryellen P Malone, Jeffrey M Cogen, Bharat I ChaudharyAbstract:Cross-linked polyethylene (XLPE) is an important class of materials with critical applications including pipes and high voltage electric cables. An organic peroxide such as bis(1-methyl-1-phenylethyl) peroxide (BMPEP) is a commonly used radical initiator in the cross-linking process along with a Secondary Antioxidant such as bis(octadecyloxycarbonylethyl) sulfide (BOCES). Herein is described a detailed investigation into the complex interactions of the radical initiator BMPEP and the Secondary Antioxidant BOCES in dodecane solvent–a model for the polyethylene polymer. Kinetic and spectroscopic experiments along with DFT calculations provide the foundation for a detailed mechanistic description for the roles of BMPEP, BOCES, atmospheric oxygen, and trace amounts of water in the overall process.
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“110th Anniversary:” Interactions of Bis(1-methyl-1-phenylethyl) Peroxide with the Secondary Antioxidant Bis(octadecyloxycarbonylethyl) Sulfide: Mechanistic Studies Conducted in Dodecane as a Model System for Polyethylene
Industrial & Engineering Chemistry Research, 2019Co-Authors: Sarath Chand Sarngadharan, Fiaz S Mohammed, Mark Conley, Harris Eldridge, Yusra Anwar, Derek Nursey, Jon Faris, Maryellen P Malone, Jeffrey M Cogen, Bharat I ChaudharyAbstract:Cross-linked polyethylene (XLPE) is an important class of materials with critical applications including pipes and high voltage electric cables. An organic peroxide such as bis(1-methyl-1-phenylethyl) peroxide (BMPEP) is a commonly used radical initiator in the cross-linking process along with a Secondary Antioxidant such as bis(octadecyloxycarbonylethyl) sulfide (BOCES). Herein is described a detailed investigation into the complex interactions of the radical initiator BMPEP and the Secondary Antioxidant BOCES in dodecane solvent–a model for the polyethylene polymer. Kinetic and spectroscopic experiments along with DFT calculations provide the foundation for a detailed mechanistic description for the roles of BMPEP, BOCES, atmospheric oxygen, and trace amounts of water in the overall process.
Jing Zhan - One of the best experts on this subject based on the ideXlab platform.
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synthesis of a novel sulfur bearing Secondary Antioxidant with a high molecular weight and its comparative study on Antioxidant behavior in polypropylene with two commercial sulfur bearing Secondary Antioxidants having relatively low molecular weight
Polymer Degradation and Stability, 2013Co-Authors: Xiaofeng Wang, Weiyi Xing, Gang Tang, Ningning Hong, Weizhao Hu, Jing Zhan, Lei Song, Wei Yang, Yuan HuAbstract:Abstract A novel sulfur-bearing Secondary Antioxidant with a high molecular weight of 2252 (OS-POSS), successfully synthesized via photoinitiated thiol-ene click reaction, was compared with two commercial sulfur-bearing Secondary Antioxidants on the stabilization of polypropylene (PP). The results of their oxidation induction time (OIT) via differential scanning calorimeter measurement (DSC) showed that the higher the molecular weight of Secondary Antioxidant is, the longer the OIT value, whether such sulfur-bearing Antioxidant is used singly or in combination with primary Antioxidant. The study of their long-term accelerated thermal aging in the air oven at 150 °C displayed that the molecular structure of sulfur-bearing Secondary Antioxidant, besides molecular weight, is another highly important factor determining the Antioxidant efficiency, i.e., physical loss of Antioxidants with the relatively low molecular weight may determine Antioxidant efficiency, whereas thioether groups having neighboring ester carbonyl moieties may decompose more hydroperoxides with quicker rate.
Lei Song - One of the best experts on this subject based on the ideXlab platform.
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synthesis of a novel sulfur bearing Secondary Antioxidant with a high molecular weight and its comparative study on Antioxidant behavior in polypropylene with two commercial sulfur bearing Secondary Antioxidants having relatively low molecular weight
Polymer Degradation and Stability, 2013Co-Authors: Xiaofeng Wang, Weiyi Xing, Gang Tang, Ningning Hong, Weizhao Hu, Jing Zhan, Lei Song, Wei Yang, Yuan HuAbstract:Abstract A novel sulfur-bearing Secondary Antioxidant with a high molecular weight of 2252 (OS-POSS), successfully synthesized via photoinitiated thiol-ene click reaction, was compared with two commercial sulfur-bearing Secondary Antioxidants on the stabilization of polypropylene (PP). The results of their oxidation induction time (OIT) via differential scanning calorimeter measurement (DSC) showed that the higher the molecular weight of Secondary Antioxidant is, the longer the OIT value, whether such sulfur-bearing Antioxidant is used singly or in combination with primary Antioxidant. The study of their long-term accelerated thermal aging in the air oven at 150 °C displayed that the molecular structure of sulfur-bearing Secondary Antioxidant, besides molecular weight, is another highly important factor determining the Antioxidant efficiency, i.e., physical loss of Antioxidants with the relatively low molecular weight may determine Antioxidant efficiency, whereas thioether groups having neighboring ester carbonyl moieties may decompose more hydroperoxides with quicker rate.