Synthesis and characterization of “Living” star-shaped poly(N-vinylcaprolactam) with four arms and carboxylic acid end groups

2016 ◽  
Vol 54 (14) ◽  
pp. 2156-2165 ◽  
Author(s):  
Norma A. Cortez-Lemus ◽  
Angel Licea-Claverie
Keyword(s):  
Carboxylic Acid ◽  
Synthesis And Characterization ◽  
End Groups

Synthesis and Characterization of 3-Phenyl-adamantane-1-carboxylic Acid

2019 ◽  
Vol 35 (4) ◽  
pp. 556-559
Author(s):  
Wei Feng ◽  
Kaiqi Ye ◽  
Yang Jiang ◽  
Ruibin Hou
Keyword(s):  
Carboxylic Acid ◽  
Synthesis And Characterization

Synthesis and Characterization of Carboxyl-Terminated Hyperbranched Polyester

2014 ◽  
Vol 665 ◽  
pp. 327-330
Author(s):  
Shi Jie Niu ◽  
Jian Wang ◽  
Yu Qing Bai ◽  
Ming Tao Run
Keyword(s):  
Glass Transition ◽  
Sodium Acetate ◽  
Succinic Anhydride ◽  
Molar Ratio ◽  
Synthesis And Characterization ◽  
Hydroxyl Groups ◽  
Hyperbranched Polyester ◽  
End Groups ◽  
Lower Glass Transition Temperature

In order to prepare carboxyl-terminated hyperbranched polyester (HBP-COOH), succinic anhydride was used to modify hydroxyl-terminated hyperbranched polyester (HBP-OH), and the influences of the solvents, catalysts and time on the product’s structure were investigated. When THF is used as the solvent, sodium acetate as the catalyst, the molar ratio of succinic anhydride and hydroxyl groups is 3:1, and the reaction time is 6 h at 65°C, the modification extent of the hydroxyl groups is about 99% with about 95% yield. HBP-COOH has much lower glass transition temperature than that of HBP-OH due to its long and flexible end-groups.

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