Carbon Dioxide/Epoxide Copolymerization via a Nanosized Zinc–Cobalt(III) Double Metal Cyanide Complex: Substituent Effects of Epoxides on Polycarbonate Selectivity, Regioselectivity and Glass Transition Temperatures

2015 ◽  
Vol 48 (3) ◽  
pp. 536-544 ◽  
Author(s):  
Xing-Hong Zhang ◽  
Ren-Jian Wei ◽  
Ying−Ying Zhang ◽  
Bin-Yang Du ◽  
Zhi-Qiang Fan
Keyword(s):  
Carbon Dioxide ◽  
Glass Transition ◽  
Substituent Effects ◽  
Transition Temperatures ◽  
Cyanide Complex ◽  
Glass Transition Temperatures ◽  
Metal Cyanide

scholarly journals Unraveling substituent effects on the glass transition temperatures of biorenewable polyesters

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Xiaopeng Yu ◽  
Junteng Jia ◽  
Shu Xu ◽  
Ka Un Lao ◽  
Maria J. Sanford ◽  
...  
Keyword(s):  
Glass Transition ◽  
Substituent Effects ◽  
Transition Temperatures ◽  
Glass Transition Temperatures

Properties of Random PSF/PES Copolymers as High-Performance Polymers

2011 ◽  
Vol 217-218 ◽  
pp. 1606-1610
Author(s):  
Dong Jiang ◽  
Xiao Ran Zhang ◽  
Yan Mei Ma ◽  
Cheng You Ma
Keyword(s):  
Weight Loss ◽  
Tensile Strength ◽  
Glass Transition ◽  
High Performance ◽  
Molar Ratio ◽  
Transition Temperatures ◽  
Elongation At Break ◽  
Glass Transition Temperatures ◽  
High Performance Polymers ◽  
Diphenyl Sulfone

A series of random polysulfone/polyethersulfone (PSF/PES) copolymers were synthesized by the polycondensation of 4, 4'-isopropylidendiphenol, 4, 4΄-dihyolroxy diphenyl sulfone and 4, 4'-dichlorodiphenyl sulfone in the presence of K2CO3. We obtained a series of copolymers by changing the molar ratio of 4, 4΄-dihyolroxy diphenyl sulfone and 4, 4'-isopropylidendiphenol (it was marked as the ratio of S:A). The copolymers have the similar solubility with polyethersulfone. They also have high glass transition temperatures (Tg: 199°C~229°C) and 5% weight loss temperatures (4, 4'-isopropylidendiphenol: 4, 4΄-dihyolroxy diphenyl sulfone=1:1, Td5=497°C). At the same time the elongation at break is much higher than that of PES, while the tensile strength is a little lower than that of PES.

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