文献类型：期刊文献

英文题名：Synthesis and characterization of poly[(methylsilylene ethynylenephenyleneethynylene)-co-(dimethylsilylene ethynylenephenyleneethynylene)]s

作者：Zhang, Ling-ling[1];Gao, Fei[1];Wang, Can-feng[1];Zhang, Jian[1];Huang, Fa-rong[1];Du, Lei[1]

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

年份：2010

卷号：28

期号：2

起止页码：199

外文期刊名：CHINESE JOURNAL OF POLYMER SCIENCE

收录：;EI(收录号：20212810631534);WOS:【SCI-EXPANDED(收录号:WOS:000274500600008)】；

基金：This work was financially supported by the National High Technology Research and Development Program of China (No. 2002-305205), the Special Material Project Program of China (No. 51312) and Key Project of Science and Technology Foundation of China (9140-12011308).

语种：英文

外文关键词：Silicon-containing arylacetylene resin; Polymer with methylsilylene and dimethysilyene units; m-diethynylbenzene; Thermally stable polymer; High performance resin

摘要：A series of poly[(methylsilylene ethynylenephenyleneethynylene)-co-(dimethylsilylene ethynylenephenyleneethynylene)] s were synthesized by the incorporation of various ratios of methylsilylene to dimethylsilylene units into the polymer chain backbone. The resultant copolymers were soluble in a variety of common organic solvents at room temperature. The copolymers were characterized by FT-IR, H-1-NMR, GPC, rheological analysis, differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The results showed that the copolymers exhibited good processability and cured at low temperatures like 200A degrees C. The curing reactions involved in hydrosilylation of Si-H and alkyne groups and the polymerization of alkynes. T (d5) (5% weight loss) of the cured copolymers ranged from 629A degrees C to 686A degrees C, and the decomposition residues of cured copolymers at 1000A degrees C ranged from 88.1% to 90.9% under nitrogen. Thermal stability of the copolymers increased with the introduction of methylsilylene units into polymer chains. The cured copolymers were sintered at 1450A degrees C, and the results of X-ray diffraction analysis showed that beta-SiC was formed in the sintered products.