文档介绍：毕业设计(论文)
题目
双酚A改性水溶性
酚醛树脂的研究
系(院)
化学与化工系
专业
应用化学
班级
学生姓名
学号
指导教师
职称
双酚A改性水溶性酚醛树脂
摘要
本论文以苯酚、甲醛为原料,在Ba(OH)2的催化下,合成了一种含有高羟甲基的甲阶酚醛树脂,并利用双酚A对酚醛树脂胶粘剂进行改性,得到了一种新型改性酚醛树脂胶粘剂,并在合成过程中考虑了反应温度、反应物料配比、催化剂用量、反应时间等因素对胶粘剂特性的影响。然后通过各种化学分析方法及测试手段对胶粘剂的各项指标进行检测,从而确定最佳的合成工艺。采用行业内要求分析了胶粘剂的游离酚和游离醛含量:通过红外光谱对各组分尤其是双酚A与其它反应物之间的相互作用进行了表征,为生产高强度的砂布用酚醛树脂提供了可靠的数据。最后初步探讨了双酚A改性酚醛树脂胶粘剂的反应机理。另外,将双酚A引入到分子结构中,提高了其耐热性尤其是瞬时耐高温性能,还可以改善韧性和抗湿性。本课题主要是针对涂敷磨料用酚醛树脂胶粘剂进行改性,经实验表明,所得改性酚醛树脂胶粘剂表干快,中低温固化后各项指标完全达到砂布用酚醛树脂胶粘剂的要求,具有较大的应用价值和实际意义。
关键词:酚醛树脂改性;双酚A;反应温度;反应时间;
Determination of Trace Copper in Potato by Two Phase Aqueous Extraction-Spectrophotometry
Abstract
A resole-type phenol—formaldehyde resin containing large number of hydromethyl groups was synthesized from phenol and aqueous formaldehyde using sodium hydroxide aS phenol—formaldehyde resins were developed from bisphenol A and polyvinyl effects of preparation condition such as the reaction temperature,mixing ratio of reactants,reaction time and the amount of catalyst were investigated during the a great variety of chemical analysis methods and modem instrumentalities were contents of free phenol and free formaldehyde were determined interactions among bisphenol,polyvinyl formal and other materials were examined by IR spectrum . content of polyvinyl formal was worked out bisphenol A was added into the resol’S structure, better tenacity,anti moisture and high—temperature resistant properties had been analysis results indicated that the modified phenol formaldehyde resins had met the requirement of emery cloth production.
Keywords:phenol—formaldehyde resin modification;bisphenol A;reaction time:reactivity temperature;
目录
目录 iii
第一章前言 1
1
1
2
3
第二章双酚A改性酚醛树脂胶黏剂 8
8
8
10
11
第三章实验部分 13
13
13
14
第四