摘要
以八苯基笼型倍半硅氧烷(OPS)、梯形聚苯基倍半硅氧烷(PPSQ)及八苯胺基倍半硅氧烷(OAPS)为改性剂,采用热失重分析方法研究了POSS种类和加入量对酚醛树脂残碳率的影响,结果表明OAPS可以有效提高酚醛树脂残碳率,当OAPS的质量分数仅为3%时,可以提高酚醛树脂基体11%的残碳率;采用红外-流变同步分析方法研究了OAPS对酚醛树脂固化过程的影响,得出OAPS促进了羟甲基和苯环上的邻位氢发生取代反应,提高交联度;进一步制备了OAPS/碳纤维/酚醛树脂复合材料,结果表明OAPS可提高酚醛树脂复合材料烧蚀性,质量烧蚀率达到0.0303 g/s,相比酚醛树脂/碳纤维复合材料降低34%。
Using OPS,PPSQ and OAPS as modifiers,three kinds of POSS modified phenol-formaldehyde resins(PF)were synthesized.The carbon residue rate of the modified resin was compared and analyzed by TG.The result showed that the OAPS modified PF had the highest carbon residue rate,which was 11%higher than PF.The effect of OAPS on the curing process of PF resin was studied by means of IR-Rheologic synchronous analysis,and it was found that OAPS promoted the substitution reaction between hydroxymethyl and active hydrogen on benzene ring.The ablation property of the OAPS/PF/carbon composite was studied by oxygen/ethyne ablation test.The mass ablation rate is 0.0303 g/s,34%lower than PF resin composites.
作者
姚亚琳
刘晶
王胖胖
田谋锋
YAO Ya-lin;LIU Jing;WANG Pang-pang;TIAN Mou-feng(Beijing Composite Materials Co,Ltd,Beijing 102101,China;State Key Laboratory of Advanced Fiber Composites,Beijing 102101,China)
出处
《复合材料科学与工程》
CAS
北大核心
2022年第5期92-97,119,共7页
Composites Science and Engineering
