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Td5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。
A series of block copolymers of poly（silane arylacetylene） and poly（siloxane arylacetylene） （SiO-b-PSA） were synthesized by the condensation reactions ofm-diethynylbenzene magnesium reagents with variousα,ω-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.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2014年第10期4168-4175,共8页
CIESC Journal
基金
上海市重点学科资助项目(B502)~~
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
Si-containing arylacetylene resin
siloxane-arylacetylene resin
block copolymer
high temperature polymer
composites
polymerization
chemical reaction
