Cyclopolymerization. Part XXXII radical polymerization of α-(2-phenylallyloxy)methylstyrene: synthesis of highly cyclized polymers with high glass transition temperatures and thermal stability

Polymer ◽  
2004 ◽  
Vol 45 (22) ◽  
pp. 7505-7512 ◽  
Author(s):  
Hyun-Jin Lee ◽  
Toshiyuki Kodaira ◽  
Michio Urushisaki ◽  
Tamotsu Hashimoto
Keyword(s):  
Thermal Stability ◽  
Glass Transition ◽  
Radical Polymerization ◽  
Transition Temperatures ◽  
Glass Transition Temperatures

Synthesis, characterization and thermal crosslinking behavior of new poly(aryl ether sulfone)s based on naphthalene isomers

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Zhang Ying ◽  
Zhang Yunhe ◽  
Niu Yaming ◽  
Na Ying ◽  
Jiang Zhenhua
Keyword(s):  
Thermal Stability ◽  
Weight Loss ◽  
Glass Transition ◽  
Free Radicals ◽  
Crosslinking Reaction ◽  
Transition Temperatures ◽  
Aryl Ether ◽  
Glass Transition Temperatures ◽  
Good Thermal Stability ◽  
Thermal Crosslinking

AbstractFour new poly(aryl ether sulfone)s containing naphthalene rings were synthesized from 1,5- and 2,7-bis-(4-fluorosulfonyl)naphthalene isomers with different diphenols. These polymers exhibited high glass transition temperatures and good thermal stability. The glass transition temperatures ranged from 220 to 236°C and the 5% weight-loss temperatures were above 423°C. As the four polymers were treated at 300°C, the glass transition temperatures of polymer series a obviously increased and the polymers became insoluble in common organic solvents including NMP, DMAc, and chloroform, etc., but the series b did not, which indicate that a thermal crosslinking reaction via free radicals happened leading to crosslinked polymers

scholarly journals Advances in Internal Plasticization of PVC: Copper-Mediated Atom-Transfer Radical Polymerization from PVC Defect Sites To Form Acrylate Graft Copolymers

Synlett ◽  
2021 ◽  
Author(s):  
Rebecca Braslau ◽  
Longbo Li ◽  
Yanika Schneider ◽  
Adrienne B. Hoeglund
Keyword(s):  
Glass Transition ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Simple Procedure ◽  
Covalent Attachment ◽  
Atom Transfer ◽  
Transition Temperatures ◽  
Glass Transition Temperatures ◽  
Defect Sites ◽  
Wide Range

AbstractInternally plasticized PVC copolymers were prepared by grafting PVC with butyl acrylate and 2-(2-ethoxyethoxy)ethyl acrylate by atom-transfer radical polymerization, resulting in well-behaved polymers with a wide range of glass transition temperatures (–54 °C to 54 °C). When the grafted side chains made up more than 50% of the polymer by weight, the glass transition temperatures were below 0 °C. The covalent attachment of the plasticizing grafts requires one simple procedure starting from commercial PVC, making this strategy an industrially relevant and environmentally friendly alternative to the use of conventional small-molecule plasticizers.

Degradability, thermal stability, and high thermal properties in spiro polycycloacetals partially derived from lignin

2021 ◽  
Author(s):  
Minjie Shen ◽  
Srikanth Vijjamarri ◽  
Hongda Cao ◽  
Karla Solis ◽  
Megan L. Robertson
Keyword(s):  
Thermal Stability ◽  
Glass Transition ◽  
Thermal Properties ◽  
High Performance ◽  
Transition Temperatures ◽  
Thermal Stabilities ◽  
Glass Transition Temperatures ◽  
Acidic Solutions

Spiro polycycloacetals were synthesized from vanillin and syringaldehyde, along with high-performance co-monomers, exhibiting high glass transition temperatures and thermal stabilities, and rapid rates of hydrolysis in acidic solutions.

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