The Experts below are selected from a list of 306 Experts worldwide ranked by ideXlab platform
Kai Wang - One of the best experts on this subject based on the ideXlab platform.
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a mild method to prepare high molecular weight poly butylene furandicarboxylate co glycolate copolyesters effects of the glycolate content on thermal mechanical and barrier properties and biodegradability
Green Chemistry, 2019Co-Authors: Han Hu, Wu Bin Ying, Zhengyang Kong, Jinggang Wang, Ruoyu Zhang, Kai WangAbstract:The melt polycondensation of glycolic acid based copolymers with high molecular weights remains a big challenge. In this work, poly(butylene furandicarboxylate-co-glycolate) (PBFGA) and poly(butylene furandicarboxylate)-b-poly(glycolic acid) (PBF-b-GA) copolyesters were synthesized via melt oligomer polycondensation and melt bulk transesterification, respectively. Herein, melt oligomer polycondensation is a better method with mild preparation conditions and products with higher molecular weights (Mw). The analysis of GPC demonstrated that PBFGAs possessed a Mw of up to 8.95 × 104 g mol−1. The PBFGAs also possessed excellent thermal stability (>320 °C), which endowed the copolymers with a wider processing window than thermolabile PGA. DSC analyses displayed that PBFGA40–PBFGA10 were semi-crystalline materials that melted between 84.5 and 156 °C, while PBFGA50–60 were amorphous. Tensile tests indicated a high elastic modulus of 524–1262 MPa, tensile strength of 16–44 MPa and good elongation at break over 220% of PBFGAs, exceeding most biodegradable packaging materials. The increase of GA units slightly impacted the barrier properties, with reduced CO2 (53×) and O2 (15×) permeability coefficients than those of commercial PBAT films, and also better than those of PET. The hydrolysis of the glycolate was restrained by steric hindrance of furan rings, while in enzymatic degradation PBFGAs displayed obvious weight loss with GA units >20 mol%. With superior thermal, tensile, barrier and degradable properties, PBFGAs have the potential to serve as promising and innovative bio-based polymers for eco-friendly and sustainable plastic packaging.
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A mild method to prepare high molecular weight poly(butylene furandicarboxylate-co-glycolate) copolyesters: Effects of the glycolate content on thermal, mechanical, and barrier properties and biodegradability
Green Chemistry, 2019Co-Authors: Han Hu, Wu Bin Ying, Chenkai Yao, Zhengyang Kong, Jinggang Wang, Lei Shi, Ruoyu Zhang, Kai Wang, Jin ZhuAbstract:The melt polycondensation of glycolic acid based copolymers with high molecular weights remains a big challenge. The melt polycondensation of glycolic acid based copolymers with high molecular weights remains a big challenge. In this work, poly(butylene furandicarboxylate- co -glycolate) (PBFGA) and poly(butylene furandicarboxylate)- b -poly(glycolic acid) (PBF- b -GA) copolyesters were synthesized via melt oligomer polycondensation and melt bulk transesterification, respectively. Herein, melt oligomer polycondensation is a better method with mild preparation conditions and products with higher molecular weights ( M w ). The analysis of GPC demonstrated that PBFGAs possessed a M w of up to 8.95 × 10 4 g mol −1 . The PBFGAs also possessed excellent thermal stability (>320 °C), which endowed the copolymers with a wider processing window than thermolabile PGA. DSC analyses displayed that PBFGA40–PBFGA10 were semi-crystalline materials that melted between 84.5 and 156 °C, while PBFGA50–60 were amorphous. Tensile tests indicated a high elastic modulus of 524–1262 MPa, tensile strength of 16–44 MPa and good elongation at break over 220% of PBFGAs, exceeding most biodegradable packaging materials. The increase of GA units slightly impacted the barrier properties, with reduced CO 2 (53×) and O 2 (15×) permeability coefficients than those of commercial PBAT films, and also better than those of PET. The hydrolysis of the glycolate was restrained by steric hindrance of furan rings, while in enzymatic degradation PBFGAs displayed obvious weight loss with GA units >20 mol%. With superior thermal, tensile, barrier and degradable properties, PBFGAs have the potential to serve as promising and innovative bio-based polymers for eco-friendly and sustainable plastic packaging.
Zafer Dogu - One of the best experts on this subject based on the ideXlab platform.
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changes in mesopotamian spiny eel mastacembelus mastacembelus bank solender in russell 1794 mastacembelidae Milt quality during a spawning period
Theriogenology, 2007Co-Authors: Erdinc şahinoz, Faruk Aral, Zafer DoguAbstract:This study was carried out to determine the Milt quality in male Mesopotamian spiny eel (Mastacembelus mastacembelus ;B ank & Solender in Russell, 1794) during spawning season. Review was performed using 58 M. mastecembulus males captured from Ataturk Dam Lake in Turkey. Milt samples were collected and evaluated daily during sampling period. In collected Milt, volume of Milt, sperm motility percentage, the duration of forward motility, sperm concentration, Milt production and Milt pH were evaluated. On June 10, 2005, 72% of the males were spermiating, which increased to 100% in the middle of June and dropped to 72% by late June. Sperm motility percentage showed a significant improvement after beginning of spermiation (P < 0.001). Sperm concentration changed significantly (P < 0.001) in Milt collected during sampling period. Duration of sperm motility increased significantly (P < 0.001) from beginning (8.22 min) through end (37.33 min) of spermiation. Milt production was maximal on June 15th, decreasing from a mean value of 3.12-0.46 � 10 9 /ml. The high pH in Milt was observed during the week of spermiation (P < 0.001). In conclusion, the results show that season has a significant influence on semen quality in male M. mastecembulus corresponding to spawning season in hot arid. Milt of good quality was especially collected in the middle of June. Spawning season in this fish species was found to be short.
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A Study on the Milt Quality of Oncorhynchus mykiss (Walbaum, 1972) and Carasobarbus luteus (Heckel, 1843) in Atatürk Dam Lake, Southeastern Turkey
Turkish Journal of Fisheries and Aquatic Sciences, 2007Co-Authors: Faruk Aral, Erdinc şahinoz, Zafer DoguAbstract:The aim of this study was to determine the Milt quality of Oncorhynchus mykiss (Walbaum, 1972) and Carasobarbus luteus (Heckel, 1843). Milt was collected twice by abdominal massage during the spawning seasons of the species. Volume, forward motility, duration of motility, Milt concentration and pH were determined in Milt collected. Body weights and lengths of brood fish were also measured. Milt volume (ml), forward motility (%), the duration of motility (sec), concentration (x10 9 cell/ml) and pH values were 1.22±0.22 and 0.80±0.06, 73.25±5.15 and 55.50±4.59, 90.80±10.40 and 175.80±17.00, 6.06±0.90 and 11.29±1.46, 7.99±0.03 and 8.07±0.12 for O. mykiss and C. luteus, respectively. The spermatozoa concentration of O. mykiss, and duration of motility, spermatozoa concentration and sperm pH of C. luteus were affected significantly by Milt stripping dates (P
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a study on the Milt quality of oncorhynchus mykiss walbaum 1972 and carasobarbus luteus heckel 1843 in ataturk dam lake southeastern turkey
Turkish Journal of Fisheries and Aquatic Sciences, 2007Co-Authors: Faruk Aral, Erdinc şahinoz, Zafer DoguAbstract:The aim of this study was to determine the Milt quality of Oncorhynchus mykiss (Walbaum, 1972) and Carasobarbus luteus (Heckel, 1843). Milt was collected twice by abdominal massage during the spawning seasons of the species. Volume, forward motility, duration of motility, Milt concentration and pH were determined in Milt collected. Body weights and lengths of brood fish were also measured. Milt volume (ml), forward motility (%), the duration of motility (sec), concentration (x10 9 cell/ml) and pH values were 1.22±0.22 and 0.80±0.06, 73.25±5.15 and 55.50±4.59, 90.80±10.40 and 175.80±17.00, 6.06±0.90 and 11.29±1.46, 7.99±0.03 and 8.07±0.12 for O. mykiss and C. luteus, respectively. The spermatozoa concentration of O. mykiss, and duration of motility, spermatozoa concentration and sperm pH of C. luteus were affected significantly by Milt stripping dates (P<0.05, P<0.01). The results suggested that the spermatozoa concentration of O. mykiss, and duration of motility, spermatozoa concentration and sperm pH of C. luteus were affected by stripping dates.
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Changes in Mesopotamian spiny eel, Mastacembelus mastacembelus (Bank & Solender in Russell, 1794) (Mastacembelidae) Milt quality during a spawning period
Theriogenology, 2006Co-Authors: Erdinc şahinoz, Faruk Aral, Zafer DoguAbstract:This study was carried out to determine the Milt quality in male Mesopotamian spiny eel (Mastacembelus mastacembelus ;B ank & Solender in Russell, 1794) during spawning season. Review was performed using 58 M. mastecembulus males captured from Ataturk Dam Lake in Turkey. Milt samples were collected and evaluated daily during sampling period. In collected Milt, volume of Milt, sperm motility percentage, the duration of forward motility, sperm concentration, Milt production and Milt pH were evaluated. On June 10, 2005, 72% of the males were spermiating, which increased to 100% in the middle of June and dropped to 72% by late June. Sperm motility percentage showed a significant improvement after beginning of spermiation (P < 0.001). Sperm concentration changed significantly (P < 0.001) in Milt collected during sampling period. Duration of sperm motility increased significantly (P < 0.001) from beginning (8.22 min) through end (37.33 min) of spermiation. Milt production was maximal on June 15th, decreasing from a mean value of 3.12-0.46 � 10 9 /ml. The high pH in Milt was observed during the week of spermiation (P < 0.001). In conclusion, the results show that season has a significant influence on semen quality in male M. mastecembulus corresponding to spawning season in hot arid. Milt of good quality was especially collected in the middle of June. Spawning season in this fish species was found to be short.
Han Hu - One of the best experts on this subject based on the ideXlab platform.
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a mild method to prepare high molecular weight poly butylene furandicarboxylate co glycolate copolyesters effects of the glycolate content on thermal mechanical and barrier properties and biodegradability
Green Chemistry, 2019Co-Authors: Han Hu, Wu Bin Ying, Zhengyang Kong, Jinggang Wang, Ruoyu Zhang, Kai WangAbstract:The melt polycondensation of glycolic acid based copolymers with high molecular weights remains a big challenge. In this work, poly(butylene furandicarboxylate-co-glycolate) (PBFGA) and poly(butylene furandicarboxylate)-b-poly(glycolic acid) (PBF-b-GA) copolyesters were synthesized via melt oligomer polycondensation and melt bulk transesterification, respectively. Herein, melt oligomer polycondensation is a better method with mild preparation conditions and products with higher molecular weights (Mw). The analysis of GPC demonstrated that PBFGAs possessed a Mw of up to 8.95 × 104 g mol−1. The PBFGAs also possessed excellent thermal stability (>320 °C), which endowed the copolymers with a wider processing window than thermolabile PGA. DSC analyses displayed that PBFGA40–PBFGA10 were semi-crystalline materials that melted between 84.5 and 156 °C, while PBFGA50–60 were amorphous. Tensile tests indicated a high elastic modulus of 524–1262 MPa, tensile strength of 16–44 MPa and good elongation at break over 220% of PBFGAs, exceeding most biodegradable packaging materials. The increase of GA units slightly impacted the barrier properties, with reduced CO2 (53×) and O2 (15×) permeability coefficients than those of commercial PBAT films, and also better than those of PET. The hydrolysis of the glycolate was restrained by steric hindrance of furan rings, while in enzymatic degradation PBFGAs displayed obvious weight loss with GA units >20 mol%. With superior thermal, tensile, barrier and degradable properties, PBFGAs have the potential to serve as promising and innovative bio-based polymers for eco-friendly and sustainable plastic packaging.
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A mild method to prepare high molecular weight poly(butylene furandicarboxylate-co-glycolate) copolyesters: Effects of the glycolate content on thermal, mechanical, and barrier properties and biodegradability
Green Chemistry, 2019Co-Authors: Han Hu, Wu Bin Ying, Chenkai Yao, Zhengyang Kong, Jinggang Wang, Lei Shi, Ruoyu Zhang, Kai Wang, Jin ZhuAbstract:The melt polycondensation of glycolic acid based copolymers with high molecular weights remains a big challenge. The melt polycondensation of glycolic acid based copolymers with high molecular weights remains a big challenge. In this work, poly(butylene furandicarboxylate- co -glycolate) (PBFGA) and poly(butylene furandicarboxylate)- b -poly(glycolic acid) (PBF- b -GA) copolyesters were synthesized via melt oligomer polycondensation and melt bulk transesterification, respectively. Herein, melt oligomer polycondensation is a better method with mild preparation conditions and products with higher molecular weights ( M w ). The analysis of GPC demonstrated that PBFGAs possessed a M w of up to 8.95 × 10 4 g mol −1 . The PBFGAs also possessed excellent thermal stability (>320 °C), which endowed the copolymers with a wider processing window than thermolabile PGA. DSC analyses displayed that PBFGA40–PBFGA10 were semi-crystalline materials that melted between 84.5 and 156 °C, while PBFGA50–60 were amorphous. Tensile tests indicated a high elastic modulus of 524–1262 MPa, tensile strength of 16–44 MPa and good elongation at break over 220% of PBFGAs, exceeding most biodegradable packaging materials. The increase of GA units slightly impacted the barrier properties, with reduced CO 2 (53×) and O 2 (15×) permeability coefficients than those of commercial PBAT films, and also better than those of PET. The hydrolysis of the glycolate was restrained by steric hindrance of furan rings, while in enzymatic degradation PBFGAs displayed obvious weight loss with GA units >20 mol%. With superior thermal, tensile, barrier and degradable properties, PBFGAs have the potential to serve as promising and innovative bio-based polymers for eco-friendly and sustainable plastic packaging.
Jin Zhu - One of the best experts on this subject based on the ideXlab platform.
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A mild method to prepare high molecular weight poly(butylene furandicarboxylate-co-glycolate) copolyesters: Effects of the glycolate content on thermal, mechanical, and barrier properties and biodegradability
Green Chemistry, 2019Co-Authors: Han Hu, Wu Bin Ying, Chenkai Yao, Zhengyang Kong, Jinggang Wang, Lei Shi, Ruoyu Zhang, Kai Wang, Jin ZhuAbstract:The melt polycondensation of glycolic acid based copolymers with high molecular weights remains a big challenge. The melt polycondensation of glycolic acid based copolymers with high molecular weights remains a big challenge. In this work, poly(butylene furandicarboxylate- co -glycolate) (PBFGA) and poly(butylene furandicarboxylate)- b -poly(glycolic acid) (PBF- b -GA) copolyesters were synthesized via melt oligomer polycondensation and melt bulk transesterification, respectively. Herein, melt oligomer polycondensation is a better method with mild preparation conditions and products with higher molecular weights ( M w ). The analysis of GPC demonstrated that PBFGAs possessed a M w of up to 8.95 × 10 4 g mol −1 . The PBFGAs also possessed excellent thermal stability (>320 °C), which endowed the copolymers with a wider processing window than thermolabile PGA. DSC analyses displayed that PBFGA40–PBFGA10 were semi-crystalline materials that melted between 84.5 and 156 °C, while PBFGA50–60 were amorphous. Tensile tests indicated a high elastic modulus of 524–1262 MPa, tensile strength of 16–44 MPa and good elongation at break over 220% of PBFGAs, exceeding most biodegradable packaging materials. The increase of GA units slightly impacted the barrier properties, with reduced CO 2 (53×) and O 2 (15×) permeability coefficients than those of commercial PBAT films, and also better than those of PET. The hydrolysis of the glycolate was restrained by steric hindrance of furan rings, while in enzymatic degradation PBFGAs displayed obvious weight loss with GA units >20 mol%. With superior thermal, tensile, barrier and degradable properties, PBFGAs have the potential to serve as promising and innovative bio-based polymers for eco-friendly and sustainable plastic packaging.
Ruoyu Zhang - One of the best experts on this subject based on the ideXlab platform.
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a mild method to prepare high molecular weight poly butylene furandicarboxylate co glycolate copolyesters effects of the glycolate content on thermal mechanical and barrier properties and biodegradability
Green Chemistry, 2019Co-Authors: Han Hu, Wu Bin Ying, Zhengyang Kong, Jinggang Wang, Ruoyu Zhang, Kai WangAbstract:The melt polycondensation of glycolic acid based copolymers with high molecular weights remains a big challenge. In this work, poly(butylene furandicarboxylate-co-glycolate) (PBFGA) and poly(butylene furandicarboxylate)-b-poly(glycolic acid) (PBF-b-GA) copolyesters were synthesized via melt oligomer polycondensation and melt bulk transesterification, respectively. Herein, melt oligomer polycondensation is a better method with mild preparation conditions and products with higher molecular weights (Mw). The analysis of GPC demonstrated that PBFGAs possessed a Mw of up to 8.95 × 104 g mol−1. The PBFGAs also possessed excellent thermal stability (>320 °C), which endowed the copolymers with a wider processing window than thermolabile PGA. DSC analyses displayed that PBFGA40–PBFGA10 were semi-crystalline materials that melted between 84.5 and 156 °C, while PBFGA50–60 were amorphous. Tensile tests indicated a high elastic modulus of 524–1262 MPa, tensile strength of 16–44 MPa and good elongation at break over 220% of PBFGAs, exceeding most biodegradable packaging materials. The increase of GA units slightly impacted the barrier properties, with reduced CO2 (53×) and O2 (15×) permeability coefficients than those of commercial PBAT films, and also better than those of PET. The hydrolysis of the glycolate was restrained by steric hindrance of furan rings, while in enzymatic degradation PBFGAs displayed obvious weight loss with GA units >20 mol%. With superior thermal, tensile, barrier and degradable properties, PBFGAs have the potential to serve as promising and innovative bio-based polymers for eco-friendly and sustainable plastic packaging.
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A mild method to prepare high molecular weight poly(butylene furandicarboxylate-co-glycolate) copolyesters: Effects of the glycolate content on thermal, mechanical, and barrier properties and biodegradability
Green Chemistry, 2019Co-Authors: Han Hu, Wu Bin Ying, Chenkai Yao, Zhengyang Kong, Jinggang Wang, Lei Shi, Ruoyu Zhang, Kai Wang, Jin ZhuAbstract:The melt polycondensation of glycolic acid based copolymers with high molecular weights remains a big challenge. The melt polycondensation of glycolic acid based copolymers with high molecular weights remains a big challenge. In this work, poly(butylene furandicarboxylate- co -glycolate) (PBFGA) and poly(butylene furandicarboxylate)- b -poly(glycolic acid) (PBF- b -GA) copolyesters were synthesized via melt oligomer polycondensation and melt bulk transesterification, respectively. Herein, melt oligomer polycondensation is a better method with mild preparation conditions and products with higher molecular weights ( M w ). The analysis of GPC demonstrated that PBFGAs possessed a M w of up to 8.95 × 10 4 g mol −1 . The PBFGAs also possessed excellent thermal stability (>320 °C), which endowed the copolymers with a wider processing window than thermolabile PGA. DSC analyses displayed that PBFGA40–PBFGA10 were semi-crystalline materials that melted between 84.5 and 156 °C, while PBFGA50–60 were amorphous. Tensile tests indicated a high elastic modulus of 524–1262 MPa, tensile strength of 16–44 MPa and good elongation at break over 220% of PBFGAs, exceeding most biodegradable packaging materials. The increase of GA units slightly impacted the barrier properties, with reduced CO 2 (53×) and O 2 (15×) permeability coefficients than those of commercial PBAT films, and also better than those of PET. The hydrolysis of the glycolate was restrained by steric hindrance of furan rings, while in enzymatic degradation PBFGAs displayed obvious weight loss with GA units >20 mol%. With superior thermal, tensile, barrier and degradable properties, PBFGAs have the potential to serve as promising and innovative bio-based polymers for eco-friendly and sustainable plastic packaging.