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OALib Journal期刊
ISSN: 2333-9721
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对炔丙氧基苯基噁唑啉的合成及改性苯并噁嗪树脂的研究
DOI: 10.3724/SP.J.1105.2014.13239, PP. 302-308
Keywords: 噁唑啉,苯并噁嗪,固化机理,热性能
Abstract:
通过四步法合成了对炔丙氧基苯基噁唑啉（p-propynyloxyphenyl-2-oxazoline简称POPO），采用核磁共振氢谱（1H-NMR）、傅立叶红外光谱（FTIR）、气相色谱质谱联用仪（GC-MS）和元素分析证实了其分子结构，以示差扫描量热仪（DSC）和热重分析（TGA）揭示了其固化行为和热分解性质，该化合物熔点为120℃，起始固化温度为200℃，固化峰值温度为280℃，自固化产物5wt%热失重温度为321℃.在此基础上，通过溶液共混法制备了双酚A型苯并噁嗪（BZ）/对炔丙氧基苯基噁唑啉（POPO）共聚树脂，且对其固化机理、固化产物的热分解性质和动态力学性能进行考察.结果表明，该噁唑啉作为交联剂，与苯并噁嗪发生开环聚合和自身炔基发生三聚成环反应，使固化产物的交联密度增加，DSC、TG和动态热机械分析（DMA）表明噁唑啉的引入提高了固化树脂的热性能和动态力学性能.且在噁唑啉含量为10wt%时，固化树脂的综合性能较优，较之纯的双酚A型苯并噁嗪树脂，起始固化温度从215℃降低至180℃，残碳率从28%提高至44%，玻璃化转变温度从166℃提高至186℃.
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