CAJ | 학술논문

聚乙二醇对树脂基玻璃纤维布复合材料增韧具有优良的效果，但其柔性链段的分子结构本质极大影响了复合材料的耐热性能。本文以聚乙二醇为改性剂制备了聚乙二醇/BT 树脂/玻璃纤维布复合材料，系统研究了不同分子链长度以及不同含量的聚乙二醇对复合材料热性能的影响。研究结果表明：聚乙二醇的加入降低了复合材料的玻璃化转变温度、5%热失重温度以及800℃残炭率。在聚乙二醇相对分子质量为4000时，复合材料的热性能出现最大值。随聚乙二醇含量的增加，复合材料的热稳定性能逐步下降。由于聚乙二醇、BT树脂、玻璃纤维布之间较大的界面结合力，使基体树脂的链运动受到一定程度的限制，一定程度上缓解了由于聚乙二醇的加入而使复合材料的热稳定性能下降的趋势。研究结果为合理添加聚乙二醇而提高复合材料的韧性提供了热性能方面的参考依据。
취을이순대수지기파리섬유포복합재료증인구유우량적효과，단기유성련단적분자결구본질겁대영향료복합재료적내열성능。본문이취을이순위개성제제비료취을이순/BT 수지/파리섬유포복합재료，계통연구료불동분자련장도이급불동함량적취을이순대복합재료열성능적영향。연구결과표명：취을이순적가입강저료복합재료적파리화전변온도、5%열실중온도이급800℃잔탄솔。재취을이순상대분자질량위4000시，복합재료적열성능출현최대치。수취을이순함량적증가，복합재료적열은정성능축보하강。유우취을이순、BT수지、파리섬유포지간교대적계면결합력，사기체수지적련운동수도일정정도적한제，일정정도상완해료유우취을이순적가입이사복합재료적열은정성능하강적추세。연구결과위합리첨가취을이순이제고복합재료적인성제공료열성능방면적삼고의거。
It is an effective method that the toughness of polymer-based glass fiber composites is improved by polyethylene glycol (PEG). However,the soft segments of PEG molecular structure have an influence on the thermal properties of composites. In this work,bismaleimide-triazine/glass fiber composites modified by PEG were prepared. The effects of molecular chain length and mounts of PEG on the thermal properties of composites were investigated. The results showed that adding PEG leads to decreases of glass-transition temperature,temperature for the total mass loss of 5%,and the char yield at 800 ℃. There is the highest value of thermal properties,when the molecular weight reaches 4000. Further,the thermal properties of the composites decreased with the increase of PEG amount. The micro-structure analysis showed that the enhanced interface bonding force among PEG,BT resin,and glass fiber are beneficial to the thermal properties,which relaxes the decreased tendency of thermal properties. These results provide a reference for improving the toughness of polymer-based glass fiber using PEG.