Effect of Fluorocarbon Side Chain on the Microphase Morphology and Rheological Behavior of Thermoplastic Polyurethanes  

作　　者：Ao Wang Shu-Ren Shao He-Cheng Wu Chen-Xu Tian Feng Luo Jie-Hua Li Zhen Li Hong Tan 

机构地区：[1]College of Polymer Science and Engineering,State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610065,China

出　　处：《Chinese Journal of Polymer Science》2023年第6期933-941,I0009,共10页高分子科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51973134 and 51703139);the State Key Research Development Program of China(No.2020YFC1107000);Fund of Cooperation of Sichuan UniversityDazhou(No.2020CDDZ-14);Chengdu Scientific Program R&D Key Project(No.2019-YF05-00156-SN);the project of the Science and Technology Department in Sichuan Province(No.2020YJ0230)。

摘　　要：Fluorinated diols(FDO)with dangling chain were introduced into polyether urethanes(PEUs)as chain extender in order to achieve internal plasticization.Based on temperature dependent Fourier transform infrared(FTIR)spectroscopy results,the fluorinated polyether urethanes(FPEUs)exhibited weaker hydrogen bonding between C=O and N―H groups with addition of FDO.The crystallinity of hard domain was destroyed determined by thermal analysis.Combined with the results of dynamic mechanical analysis(DMA)and dissipative particle dynamics(DPD)simulation,it was proved that more loosely aggregated hard domains with weakened interaction separated from soft segment were formed.Rheological analysis indicated that FDO reduced the complex viscosity and viscous flow activation energy which endowed the polymer with more flexibility.Despite the loss of hydrogen bonds,there was no significant decline in mechanical property resulting from the decrease of hard segment dissolved in soft segment phase.The presence of fluorinated carbon side chain could function as internal plasticizer and contribute to the processability of polyurethane.

关 键 词：CARBON BONDS destroyed 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]