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摘要
双环苯并噁嗪树脂(B-BOZ)是一种具有优良耐热性、力学性能且固化收缩率几乎为零的新型酚醛树脂,但作为高性能树脂使用时仍存在很多问题,如固化温度过高(200℃)以上,耐热性能和阻燃性不足且脆性较大。而超支化聚磷酸酯(HBPP)利用自身含磷的高度支化结构和大量的酚羟基提高树脂的耐热性、阻燃性及固化工艺。使用一种具有优异性能的HBPP对B-BOZ进行改性,研究HBPP对B-BOZ的耐热性能、韧性和工艺性等方面的改性作用,结果发现HBPP中大量的酚羟基端基对B-BOZ树脂噁嗪环的开环起催化作用,显著降低了B-BOZ树脂的固化温度,并且HBPP改善了B-BOZ的耐热性和阻燃性,得到了性能优异的HBPP改性B-BOZ树脂。
Abstract
Bicyclic benzoxazine resin (B-BOZ) is a novel kind of phenolic resin with excellent heat resistance,mechanical properties and low curing shrinkage rate,but it still exists many problems when used as high performance resin,such as high curing temperature (above 200℃),not enough thermal resistance and flame retardancy,and the brittleness.Therefore,hyperbranched polyphosphate (HBPP) was used to improve the thermal resistance,flame retardancy and curing process of B-BOZ by its highly branched phosphorus-containing structure and a large number of phenol groups.The results showed that the curing temperature of B-BOZ resin can be greatly decreased by HBPP with large number of phenol groups.Thermal resistance and flame retardancy of cured B-BOZ resin also can be significantly improved by HBPP with the phosphorus-containing structure.
关键词
苯并噁嗪树脂
/
超支化聚磷酸脂
/
改性
Key words
benzoxazine resin
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hyperbranched polyphosphate
/
modification
超支化聚磷酸酯改性苯并噁嗪树脂性能研究[J].
化工新型材料, 2018, 46(10): 126-129 DOI:
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基金资助
国家自然科学基金青年科学基金(51308063);中国博士后科学基金(2014T70899);长安大学中央高校基本科研业务费资助项目(310831161021)
