Influence of Hydrogen Bonding on the Temperature-Accelerated Hydrolysis of Silicone Based Polyetherurethane  

作　　者：He-Cheng Wu Shu-Ren Shao Shuo-Hong Dong Ao Wang Zhen Li Xiang-Long Han Feng Luo Jie-Hua Li Dai-Guo Zhao Wan-Ling Lan Hong Tan 

机构地区：[1]College of Polymer Science and Engineering,State Key Laboratory of Polymer Materials Engineering,Med-X Center for Materials,Sichuan University,Chengdu 610065,China [2]State Key Laboratory of Oral Diseases,National Clinical Research Center for Oral Diseases,West China Hospital of Stomatology,Sichuan University,Chengdu 610041,China [3]Sichuan Institute for Food and Drug Control,Chengdu 611731,China

出　　处：《Chinese Journal of Polymer Science》2023年第8期1230-1237,I0007,共9页高分子科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.51973134);the State Key Research Development Program of China(No.2020YFC1107000);the NSAF(No.U1930204);Interdisciplinary Innovation Projects of West China Hospital of Stomatology Sichuan University(No.RD-03-202001)。

摘　　要：Temperature-accelerated in vitro degradation was established to estimate the longevity of polyurethane applied for long-term implantation.However,the prediction did not correlate well with the data from clinical explants and the rationality of accelerated in vitro test is still in a controversial due to the deviation.To improve the accuracy of the in vitro prediction,the influence of hydrogen bonding(HB)on the accelerated hydrolysis of silicone based polyetherurethans(SPEUs)extended with three side chains.Combining the temperature-controlled FTIR and the physical properties after temperature-accelerated in vitro degradation,it was demonstrated that side chain could increase the degree of hydrogen bond dissociation at higher temperature,resulting in the decrease of the calculated activation energy(E_(a))of hydrolysis.At low temperatures,changes in surface morphology and molar mass of PEUs are minimal and HB are less easily dissociated,which had barely impact on the hydrolysis resistance.It was proposed that the E_(a) will not be impacted and that the accuracy of prediction will be increased if the acceleration temperature is lower than 70℃ and HB change is less than 15%.

关 键 词：Polyether urethane POLYDIMETHYLSILOXANE Activation energy Hydrogen bonding Hydrolysis resistance 

分 类 号：TQ317[化学工程—高聚物工业]