摘要
利用羟甲基化三聚氰胺和γ-环氧丙氧基三甲氧基硅烷反应制备了三聚氰胺有机硅杂化物,并用FTIR、29S iNMR对其结构进行了表征。然后将其与环氧树脂共混固化,对固化物热性能、阻燃性、力学性能进行了分析。结果表明,该三聚氰胺有机硅杂化环氧树脂固化物不仅保持纯环氧树脂玻璃化转变温度,而且在空气和氮气中的热失重分析显示,高温区域的热稳定性及残碳率比纯环氧树脂高;三聚氰胺有机硅杂化环氧树脂固化物的极限氧指数达到30.2,与纯环氧树脂相比,该固化物的极限氧指数提高了43%左右,抗冲击强度有较大幅度的提高,当三聚氰胺有机硅杂化物的添加量为环氧树脂质量的5%时,环氧树脂固化物的抗冲击强度达到20.3 kJ/mol;扫描电子显微镜照片显示三聚氰胺有机硅杂化环氧树脂的韧性较纯环氧树脂有很大提高。
A novel hybrid of melamine and organosilicon was synthesized by the reaction between melamine of hydroxymethylation and glycidoxypropyltrimethoxysilane.The structure of the product was confirmed by FTIR and ^29SiNMR.Then the hybrid was introduced to epoxy resin in the curing procedure.Studies on properties of the cured epoxy resin revealed that the thermal properties,flame retardant and mechanical properties were improved simultaneously,compared with that of the controlled epoxy resin.The glass transition temperature of the cured epoxy resin was in the level of that for the controlled epoxy resin.Moreover,the thermal gravimetric analysis suggested that the thermal stability and the char yield of the cured epoxy resin containing hybrid of melamine and organosilicon was higher than that of the controlled epoxy resin in the hihger temperature range.The limited oxygen index（LOI） of the cured epoxy resin increased to 30.2,and increased by 43%,in comparison with LOI of the controlled epoxy resin,while the impact strength improved significantly,indicating by the impact strength of the cured epoxy resin containing the hybrid of melamine and organosilicon was 20.3 kJ/mol,when 5% the hybrid of melamine and organosilicon was added in the systerm.The scanning electronic morphology of cross-section also revealed that the toughness of the complex was improved.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2010年第3期284-288,共5页
Fine Chemicals
关键词
环氧树脂
杂化物
热性能
阻燃性
力学性能
橡塑助剂
epoxy resin
hybrid
thermal properties
flame retardant
mechanical properties
rubber and plastics auxiliaries
