Kinetics of Catalyzed Thermal Degradation of Polylactide and Its Application as Sacrificial Templates  

作　　者：Li Feng Chenhui Cui Zhen Li Mengyuan Zhang Shenghui Gao Qiang Zhang Youshen Wu Zhishen Ge Yilong Cheng Yanfeng Zhang 

机构地区：[1]School of Chemistry,Xi'an Jiaotong University,Xian,Shaanxi 710049,China [2]Shaanxi Yuneng Group Energy and Chemical Industry Research Institute Co.,Ltd.,Yulin,Shaanxi 719000,China

出　　处：《Chinese Journal of Chemistry》2022年第23期2801-2807,I0002,共8页中国化学（英文版）

基　　金：supported by the National Natural Science Foundation of China(52173079 and 51873170);the National Key R&D Program of China(2019YFA0706801);the Shaanxi International Science and Technology Cooperation Program Project(2020kW-062);the Xi'an Scientific and Technological Achievements Transformation Project(20KYPT000108);the Key Laboratory Construction Program of Xi'an Science and Technology Bureau(201805056ZD7CG40);the Shaanxi Provincial Natural Science Basic Research Program-Shaanxi Coal Joint Fund(2021JLM-40);the One Hundred Talents Program of Shaanxi Province。

摘　　要：Polylactide(PLA)is an outstanding sacrificial template material for the manufacture of microchannels in a thermosetting matrix.However,the initial thermal degradation temperature of pure PLA is relatively high(about 280℃),which limits its use as a sacrificial template.In this report,we found that TBD,an organic base catalyst,can significantly reduce the thermal degradation temperature of PLA.TBD has higher catalytic activity for the thermal degradation of PLA compared with Tin(II)oxalate(Sn(Oxa)),one catalyst reported in the literature.Moreover,the gaseous products catalyzed by TBD for PLA thermal degradation are mainly lactide,and the formation temperature of the monomer is lower and the yield is higher,which may have potential value for PLA recycling.A combined catalyst,S8T2,was composed of 80%low activity catalyst Sn(Oxa)and 20%high activity catalyst TBD,which can catalyze the rapid degradation of PLA without greatly damaging the mechanical properties of PLA.PLA-S8T2 sacrificial fibers can form high-precision one-dimensional microchannels in the epoxy resin matrix,and 3D-printed PLA-S8T2 sacrificial templates can be used to form three-dimensional microchannels in a thermosetting matrix by vaporization of sacrificial components process(VaSC).These features highlight the great potential of PLA-S8T2 as sacrificial template material for the preparation of the complicated microchannels in the thermosetting matrix.

关 键 词：POLYMERS Gaseous product KINETICS Sacrificial template MICROCHANNEL 

分 类 号：O64[理学—物理化学]