文献类型：期刊文献

英文题名：Preparation and Characterization of Silicon-containing Polyarylacetylene/montmorilloite Nanocomposites

作者：Tong, Yang[1];Yuan, Qiaolong[1];Huang, Farong[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Specially Funct Polymer Mat & Related Tec, Shanghai 200237, Peoples R China

年份：2019

卷号：58

期号：4

起止页码：469

外文期刊名：JOURNAL OF MACROMOLECULAR SCIENCE PART B-PHYSICS

收录：;EI(收录号：20194607689193);WOS:【SCI-EXPANDED(收录号:WOS:000471935500001)】；

语种：英文

外文关键词：Dimethylphenylpropargyl ammonium bromide; montmorillonite; silicon-containing polyarylacetylene; nanocomposite; thermal properties; flexural properties

摘要：Dimethylphenylpropargyl ammonium bromide (DMPPAB) was synthesized and used to modify pristine montmorillonite (MMT) by a cation exchange process. The organically modified montmorillonite (OMMT) was verified and used to mix with a silicon-containing polyarylacetylene (PSA) as well as MMT. The PSA/MMT and PSA/OMMT nanocomposites were prepared by solution under sonication and melting intercalation processes, respectively, and then cured by a step heating process. The thermal and flexural properties of the cured PSA and nanocomposites were studied by thermogravimetric and dynamic mechanical analysis. The results showed that the intercalation of DMPPAB into the MMT galleries made the d-spacing enlarge. During PSA curing, the cure heat of PSA caused the MMT and OMMT to delaminate and exfoliate in the PSA matrix. The glass transition temperature of the cured PSA and nanocomposites were higher than 500 degrees C. The inner acetylenic groups in the PSA resin could further crosslink above 300 degrees C. The temperature at 5% mass loss of the cured PSA decreased by 4.6% with 3% mass fraction of OMMT loading, and the char yield of the cured PSA changed only slightly. The flexural strength of the cured PSA was augmented with addition of MMT or OMMT, but the flexural modulus of the cured PSA decreased slightly. The flexural strength of the cured nanocomposite increased from 20.1MPa to 30.1MPa when 3% mass fraction of OMMT was added into the PSA matrix.