摘要
通过有机磷化合物9,10-二氢-9-氧杂-10-磷杂菲-10-氧化物(DOPO)与双酚A型环氧树脂反应合成了一种含磷环氧树脂。通过跟踪测定环氧当量研究了开环反应过程,并用傅里叶红外光谱仪对产物结构进行了表征;采用差示扫描量热法和平板凝胶法表征了树脂体系的固化特性;依据UL 94垂直燃烧法研究了磷含量与树脂体系阻燃性能的关系,采用热重分析(TGA)研究了不同含磷量环氧树脂的残炭率及裂解性能;采用差示扫描量热仪和电子万能拉伸试验机研究了阻燃环氧树脂固化物的耐热性和力学性能。结果表明,DOPO与双酚A型环氧树脂在170℃下6 h可完成开环加成反应;含磷环氧树脂的固化温度较双酚A型环氧树脂提高;磷含量为2.0%(质量分数,下同)时,含磷环氧树脂固化物阻燃性能达UL 94 V-0级,残炭率为23%;其固化物的耐热性和力学性能较双酚A型环氧树脂无明显下降。
A novel liquid phosphorus-containing epoxy resin was synthesized via a reaction of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide（DOPO） with diglycidyl ether of bisphenol A. The relations between phosphorus content and flame retardancy of epoxy systems were studied. Heat-resistance and machanical properties of cured epoxy resin were also characterized. It was found that the reaction between DOPO and diglycidyl ether of bisphenol A was completed after 6 hours at 170℃. Flame-retartant epoxy resin with 2.0 % phosphorus content achieved UL94 V-0 and resulted in a char yield of 23 % at 600℃. Compared with phosphorus-free diglycidyl ether of bisphenol A epoxy resin, the incorporation of DOPO caused no significant decrease in Tg and mechanical properties.
出处
《中国塑料》
CAS
CSCD
北大核心
2010年第9期31-35,共5页
China Plastics
