2-乙基-4-甲基咪唑促进环氧-酸酐体系胶液结晶问题研究
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摘要
在一种自主研制的环氧树脂胶液使用过程中发现,胶桶内壁液面处有时会出现一层具有粘性的半固体状物质(称之为结晶)。为了解决胶液结晶问题,根据文献调研情况,开展了相关实验研究。实验研究结果表明:甲基四氢邻苯二甲酸酐(MeTHPA)与2-乙基-4-甲基咪唑(2,4-EMI)发生了胺解反应,生成了一种酰胺和羧酸,因其不溶于树脂体系而导致结晶;调整配制工艺,将2,4-EMI先加入环氧树脂中,并初步搅拌混合,之后再加入MeTHPA和助剂,混合均匀,则可以有效避免结晶现象的出现。
With the use of a kind of epoxy resin glue,a kind of adhesive half-solid matter appeared on the inside surface of resin barrel where was the resin surface,which was called crystallization. In order to solve the crystallization problem of resin matrix,consulting related reference was done in the paper,and related test research was developed at the same time. The results show that,the reason for the resin crystallization was that some unnecessary chemical reaction happened between Me THPA and 2,4-EMI,which produced a kind of acid amides and carboxylic acid. They could not dissolve in the resin system and thus produce a kind of crystallization chemical substance. The crystallization phenomenon can be avoided effectively when make-up process was modified,namely the 2,4-EMI was added to epoxy resin first,and then preliminary mixture was done,then MeTHPA and assistant agent was added sequentially.
With the use of a kind of epoxy resin glue,a kind of adhesive half-solid matter appeared on the inside surface of resin barrel where was the resin surface,which was called crystallization. In order to solve the crystallization problem of resin matrix,consulting related reference was done in the paper,and related test research was developed at the same time. The results show that,the reason for the resin crystallization was that some unnecessary chemical reaction happened between Me THPA and 2,4-EMI,which produced a kind of acid amides and carboxylic acid. They could not dissolve in the resin system and thus produce a kind of crystallization chemical substance. The crystallization phenomenon can be avoided effectively when make-up process was modified,namely the 2,4-EMI was added to epoxy resin first,and then preliminary mixture was done,then MeTHPA and assistant agent was added sequentially.
引文
[1]苏祖君,曾金芳,王华强.酸酐固化环氧树脂用促进剂评述[J].热固性树脂,2004(5):35-38.
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[7]李默宇,梁胜彪,孟庆云.碳纤维湿法缠绕用高模量高韧性环氧树脂基体[J].玻璃钢/复合材料,2009(2):72-77.
[8]芦武刚,吴肖萍.一种湿法成型用中高温固化高性能树脂基体[C]//中国核学会进展报告(第四卷).2015:153-158.
[9]李凤英,孙中子,蔡继杰,等.添加剂对环氧/酸酐/咪唑粘合剂固化行为的影响[J].化学工业与工程,1991(3):1-5.
[10]林益军,朱祖钊,全春生,等.固化促进剂对环氧树脂固化物性能的影响[J].热固性树脂,2011,26(4):22-25.
[11]胡玉明.环氧固化剂及添加剂[M].北京:化学工业出版社,2011:107-108.
[12]姚映钦.有机化学[M].武汉:武汉理工大学出版社,2005:213-214.
[13]朱明华.仪器分析[M].北京:高等教育出版社,2005:294-307.
[14]张美珍.聚合物研究方法[M].北京:中国轻工业出版社,2002:10-17.
[15]贺丽鹏,燕方龙,曹勃阳,等.苯胺和苯酚与环酐的酰胺化及酯化反应[J].吉林大学学报(理学版),2006,2(44):287-290.
[2]亢雅君,殷立新.环氧树脂中温固化促进剂评述[J].热固性树脂,1995(2):47-51.
[3]孙曼灵,郑水蓉,马玉春.环氧树脂固化促进剂(Ⅰ)-现状与前景[C]//中国环氧树脂应用技术学会“第十五次全国环氧树脂应用技术学会交流会暨华中分会第十三次年会”论文集.2011:11-14.
[4]孙曼灵,郑水蓉,马玉春.环氧树脂固化促进剂(Ⅱ)-环氧/酸酐体系的固化促进剂[C]//全国环氧树脂应用技术学会交流会暨学会西北地区分会学术交流会暨西安粘接技术协会学术交流会论文集.2012:29-47.
[5]何履平.促进剂对环氧树脂-酸酐体系固化反应的影响[C]//第六次全国环氧树脂应用技术学术交流会论文集.1995:64-66.
[6]何崇军,蔡立彬,崔英德.环氧树脂固化体系研究进展[J].广州化工,2002,4(30):109-111.
[7]李默宇,梁胜彪,孟庆云.碳纤维湿法缠绕用高模量高韧性环氧树脂基体[J].玻璃钢/复合材料,2009(2):72-77.
[8]芦武刚,吴肖萍.一种湿法成型用中高温固化高性能树脂基体[C]//中国核学会进展报告(第四卷).2015:153-158.
[9]李凤英,孙中子,蔡继杰,等.添加剂对环氧/酸酐/咪唑粘合剂固化行为的影响[J].化学工业与工程,1991(3):1-5.
[10]林益军,朱祖钊,全春生,等.固化促进剂对环氧树脂固化物性能的影响[J].热固性树脂,2011,26(4):22-25.
[11]胡玉明.环氧固化剂及添加剂[M].北京:化学工业出版社,2011:107-108.
[12]姚映钦.有机化学[M].武汉:武汉理工大学出版社,2005:213-214.
[13]朱明华.仪器分析[M].北京:高等教育出版社,2005:294-307.
[14]张美珍.聚合物研究方法[M].北京:中国轻工业出版社,2002:10-17.
[15]贺丽鹏,燕方龙,曹勃阳,等.苯胺和苯酚与环酐的酰胺化及酯化反应[J].吉林大学学报(理学版),2006,2(44):287-290.