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化学工程及工艺专业毕业论文

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毕业设计说明书(论文)毕业设计说明书(论文)中文摘要环氧树脂是一种重要的热固性树脂,因其具有良好的综合性能和工艺性而在复合材料、胶黏剂和涂料行业中有着不可代替的作用然而,其固化物脆性大、耐热性差难以满足日益发展的工程技术要求,限制了环氧树脂进一步应用随着高新技术的不断发展,对环氧树脂提出了越来越高的要求,因而也就不断推动着高性能环氧树脂的研究开发本论文研究的三酚基甲烷缩水甘油醚是一种耐高温环氧树脂,这种树脂具有良好的韧性和加工性能,可广泛用于高性能复合材料、封装材料等领域本文以苯酚和对羟基苯甲醛为原料合成三酚基甲烷,再以三酚基甲烷与环氧氯丙烷(ECH)缩合制备三酚基甲烷缩水甘油醚通过不同条件的对比,得出制备三酚基甲烷缩水甘油醚的最佳工艺选用酰亚胺作为固化剂,得到具有良好机械性能和粘接强度的耐高温环氧胶黏剂实验研究合成出了单体三酚基甲烷以及三酚基甲烷缩水甘油醚,并采用FTIR、HPLC、NMR等手段进行了表征,还对THPM单体的环氧值、熔点以及环氧树脂的剪切强度等基本性能进行了研究同时创新性的发现并采用二氯甲烷和乙醇溶液来提纯THPM单体结果表明该环氧树脂的环氧值为0.551,HPLC图表明三酚基甲烷单体纯度是98.98%。

关键词 耐高温环氧树脂 三酚基甲烷缩水甘油醚 苯酚 对羟基苯甲醛 环氧氯丙烷毕业设计说明书(论文)外文摘要Title Studies of Synthetic Techniques of Tri (4-hydroxyphenyl) Methane Glycidyl Ether with Phenol and Parahydroxy BenzaldehydeAbstractEpoxy resin is an important thermosetting resin .As we known that epoxy resins were widely used as adhesives and matrix resin in composites. However, most thermosetting resin for many disadvantages, such as the great brittleness in the cured state and low heat-resistance, so it’s difficult to fit for the requirements of the developing engineering technology and restricts its application in some special occasion.The article introduces tri(4-hydroxyphenyl) methane ether is a high temperature resistant epoxy resin .It has excellent tenacity and process ability, and it is widely used as high performance composite and encapsulation materials .The article mainly studies the syntheses of tri(4-hydroxyphenyl) methane with phenol and parahydroxy benzaldehyde tri(4-hydroxyphenyl) methane glycidyl ether with the tri(4-hydroxyphenyl) methane and chloropropane. Comparing the diffirent condition of the reaction, the optimum synthetic techniques of superior quatily of tri(4-hydroxyphenyl) methane glycidyl ether is given.High temperature resistant epoxy adhesives had been proved to have good mechanical properties and bonding strength because they combined the advantages of epoxy resin and polyimide resin by mixing of the two resin with complementary properties.Experimental study of synthesis of monomer tri(4-hydroxyphenyl) methane and tri(4-hydroxyphenyl) methane glycidyl ether,deeply studied on the basic performance of THPM monomer and epoxy resin by measuring FTIR, HPLC, NMR, epoxy value, melting point and shear strength. And innovatively adopting dichloromethane and ethanol solution to purification THPM monomer. Results show that the epoxy value of THPMGE is 0.551 and HPLC spectra indicates tri(4 –hydroxyphenyl ) methane monomer purity is 98.98%.Keywords heat resistant epoxy resin tri(4-hydroxyphenyl) methane glyci dyl ether phenol parahydroxy benzaldehyde chloropropane 本科毕业设计说明书(论文) 第 I 页 共 II 页 目 次1绪论………………………………………………………………………11.1 引言………………………………………………………………………………11.2 环氧树脂概况……………………………………………………………………11.2.1 环氧树脂定义…………………………………………………………………11.2.2 环氧树脂的发展历史…………………………………………………………21.2.3 环氧树脂的分类………………………………………………………………41.2.4 环氧树脂的产量与应用………………………………………………………61.3 高耐热环氧树脂发展趋势………………………………………………………81.3.1 新型环氧树脂…………………………………………………………………81.3.2 新结构的耐高温固化剂……………………………………………………121.3.3无机纳米复合材料的开发………………………………………………… 131.4 合成三酚基甲烷缩水甘油醚工艺的意义……………………………………141.4.1合成三酚基甲烷(THPM)单体………………………………………………141.4.2 THPMGE的目的和意义………………………………………………………152 实验部分…………………………………………………………………………162.1 实验原料………………………………………………………………………162.1.1 合成原料……………………………………………………………………162.1.2固化剂………………………………………………………………………162.1.3 实验设备……………………………………………………………………172.2 THPMGE环氧树脂合成…………………………………………………………182.2.1 三酚基甲烷的合成…………………………………………………………182.2.2三酚基甲烷缩水甘油醚的合成……………………………………………192.3 性能测试………………………………………………………………………192.3.1 环氧值………………………………………………………………………202.3.2 熔点…………………………………………………………………………212.3.3 红外光谱……………………………………………………………………222.3.4 高效液相色谱………………………………………………………………222.3.5核磁共振测定………………………………………………………………223 结果与讨论………………………………………………………………………223.1合成工艺………………………………………………………………………223.1.1三酚基甲烷(THPM)单体合成工艺以及新提纯方法…………………………… 223.1.2三酚基甲烷缩水甘油醚的合成…………………………………………233.2 THPM单体的表征……………………………………………………………233.2.1熔点表征……………………………………………………………………233.2.2红外光谱表征………………………………………………………………243.2.3 高效液相色谱表征…………………………………………………………253.2.4 核磁共振表征 ………………………………………………………………263.3 三酚基甲烷缩水甘油醚的环氧值…………………………………………… 273.3.1 ECH和三酚基甲烷的摩尔比对反应产物的影响…………………………273.2.2 NaOH的用量、浓度对反映的影响…………………………………………283.4 需要进一步研究解决的问题………………………………………………………30结论…………………………………………………………………………………31致谢…………………………………………………………………………………32参考文献……………………………………………………………………………33 本科毕业设计说明书(论文) 第 1 页 共 35页1 绪论1.1引言环氧树脂(epoxy resins)是一种环氧低聚物(epoxy olygomer),简写为EP,与固化剂(hardener)反应时便可形成三维网状的热固性塑料。

环氧树脂由于具有较好的热稳定性、绝缘性、粘附性、良好的力学性能、成型工艺性能以及低成本等优势,广泛应用于电子元器件的黏接、封装以及印制线路板的制作领域,成为目前最为重要的电子化学材料之一随着电子工业的发展[1],对EP材料的耐热性、耐湿性提出更苛刻的要求,开发高耐热型环氧树脂具有十分重要的价值[2]环氧树脂固化物耐热性主要取决于环氧树脂本身的分子骨架结构,同时与固化剂、固化工艺、交联情况以及使用改性填料。

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