Synthesis and characterization of block copolymers of poly(silane arylacetylene) and poly(siloxane arylacetylene)

doi:10.3969/j.issn.0438-1157.2014.10.055

Abstract

Abstract: A series of block copolymers of poly(silane arylacetylene) and poly(siloxane arylacetylene) (SiO-b-PSA) were synthesized by the condensation reactions of m-diethynylbenzene magnesium reagents with various a,w-bis(chloro)dimethylsiloxanes. Carbon fiber reinforced composites were prepared through compression molding. The structures and properties of the resins and composites were characterized by FT-IR, ¹H NMR, GPC, DSC, TGA and mechanical tests. The copolymers had good heat resistance and toughness. The copolymers also showed excellent processability that could be cured at below 200℃. The cured resins possessed high thermal and thermooxidative stability. Their thermo-decomposition occurred at above 513℃ in N₂. Impact strength of the composites arrived at as high as(30.92±0.44) kg·m^-2.

Key words: Si-containing arylacetylene resin, siloxane-arylacetylene resin, block copolymer, high temperature polymer, composites, polymerization, chemical reaction

摘要： 合成了不同链段长度的卤代硅氧烷，并用其与间二乙炔基苯格氏试剂反应，合成了两种硅烷芳炔-硅氧烷芳炔嵌段共聚物（SiO-b-PSA），并制成碳纤维增强树脂复合材料。利用红外光谱（FT-IR）、核磁共振氢谱（¹H NMR）、凝胶渗透色谱（GPC）、旋转流变、差示扫描量热分析（DSC）、热失重分析（TGA）和悬梁臂冲击实验对共聚物及其复合材料的结构和性能进行表征。研究结果表明所合成的共聚物具有优良的耐热性和韧性，硅烷芳炔-硅氧烷芳炔嵌段共聚物在氮气气氛下的T_d5高于513℃，1000℃残留率高于78.9%，硅烷芳炔-硅氧烷芳炔嵌段共聚物/碳纤维复合材料的冲击强度高达（30.92±0.44） kJ·m^-2。

关键词: 含硅芳炔树脂, 硅氧烷芳炔树脂, 嵌段共聚物, 耐高温树脂, 复合材料, 聚合, 化学反应

CLC Number:

TQ323.1

WANG Qiang, YANG Jianhui, YUAN Qiaolong, HUANG Farong, DU Lei. Synthesis and characterization of block copolymers of poly(silane arylacetylene) and poly(siloxane arylacetylene)[J]. CIESC Journal, 2014, 65(10): 4168-4175.

汪强, 杨建辉, 袁荞龙, 黄发荣, 杜磊. 硅烷芳炔-硅氧烷芳炔嵌段共聚物的合成与表征[J]. 化工学报, 2014, 65(10): 4168-4175.

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