一(3-氨基)丙基七异丁基笼形硅氧烷改性聚丙交酯树脂的合成及其复合材料性能研究  

Synthesis of PLA-AMPOSS and its composite by modification of polylactide resin with AMPOSS

作　　者：李汝珍[1] 麻文胜[1] Li Ruzhen;Ma Wensheng(Guangxi Vocational Technical College,Nanning 530226)

机构地区：[1]广西职业技术学院,南宁530226

出　　处：《化工新型材料》2021年第6期79-82,共4页New Chemical Materials

基　　金：广西高等学校科学研究资助项目(KY2015YB383)。

摘　　要：采用一(3-氨基)丙基七异丁基笼形硅氧烷(AMPOSS)与丙交酯(D,L-LA),在催化剂Sn(Oct)2作用下原位聚合,合成PLA-AMPOSS纳米杂化粒子,并应用红外光谱(FT-IR)、核磁氢谱(1H-NMR)对其进行结构表征;再将其与聚丙交酯(PLA)溶液进行共混,合成PLA/PLA-AMPOSS纳米复合材料,对复合材料的热稳定性和力学性能进行分析测试。结果表明:AMPOSS与D,L-LA发生了开环共聚,低聚丙交酯成功接枝到AMPOSS表面;复合材料的热重曲线表明PLA-AMPOSS的混入并未改变聚丙交酯树脂的降解机理,且使基体的热稳定性增强;力学性能测试结果表明,PLA-AMPOSS的引入对聚丙交酯树脂有增强增韧的作用,引入含量在10%和15%时,复合材料的拉伸强度和断裂伸长率分别最大,为34.6MPa和4.8%。PLA-AMPOSS nano-hybrid particles were synthesized by in-situ polymerization of one(3-amino)propyl 7-isobutyl cage siloxane(AMPOSS)and lactide(D,L-LA)under the action of Sn(Oct)2,and their structures were characterized by FT-IR and 1H-NMR.Then it was mixed with polylactide(PLA)solution to synthesize PLA/PLA-AMPOSS nanocomposites,and the thermal stability and mechanical properties of the composites were analyzed and tested.FT-IR and 1H-NMR spectra showed that AMPOSS had open-loop copolymerization with D,L-LA,and oligopolyllactide was successfully grafted to the surface of AMPOSS.The TGA curve of the composite showed that the mixing of PLA-AMPOSS did not change the degradation mechanism of polylactide resin,and the thermal stability of the matrix was enhanced.The mechanical properties test results showed that the introduction of PLA-AMPOSS could enhance and toughen the polylactide resin.When the introduction content was 10%and 15%,the tensile strength and elongation at break of the composite were the largest,respectively,at 34.6 MPa and 4.8%.

关 键 词：聚丙交酯树脂 笼形硅氧烷 外消旋丙交酯 复合材料 

分 类 号：O634.3[理学—高分子化学]