【作者】 董春法；

【导师】 王重辉；

【作者基本信息】 武汉理工大学 ， 复合材料学， 2009， 硕士

【摘要】 环氧树脂具有粘接强度高、稳定性好、收缩率小、机械强度高以及优良的的电绝缘性和良好的加工性,因此在国民经济的各个领域中被广泛的应用,例如多种金属与非金属材料的粘结、耐腐蚀涂料、电气绝缘材料、玻璃钢/复合材料等。但是环氧树脂也存在着一些不足,使其应用范围受到了限制。人们试图通过改性的方法来增加环氧树脂的性能。其中添加微粒子到环氧树脂固化物的体系中是一种有效的方法。本文通过往工业环氧树脂或是实验室合成的环氧树脂中里添加疏水性微粒子WS-12,使得环氧树脂固化物的综合力学性能得到提高。另外纯环氧树脂固化物是亲水性物质,但添加的微粒子WS-12具有很强的疏水性能,因此添加微粒子WS-12的环氧固化物的疏水性能得到很大的提高。在环氧树脂应用中,固化剂占有十分重要的位置。纯环氧树脂在一般条件下并不会固化,只有加入固化剂,组成配方树脂,并在一定的条件下进行固化反应,使其具有优良的性能。因此,对普通的环氧固化剂的改性是环氧树脂的应用研究的一个方向之一。本论文通过往普通环氧固化剂中加入一定量的增强剂,让其在一定的条件下反应几个小时。使得普通环氧固化剂的分子键增长,同时在它的分子链上加入一些能与环氧基反应的官能团。从而达到改性环氧树脂固化剂的目的。改性后的环氧固化剂与环氧树脂在一定条件下固化反应,由于其能与环氧树脂反应基团增多,交联密度增大。因此与环氧树脂生成立体网状结构的固化物具有更好的力学性能,使得环氧树脂的性能得到体现。大多数环氧树脂都不溶于水,只溶于芳香烃及酮类等有机溶剂。而有机溶剂易燃、易爆、有毒、污染环境等缺点给储运和施工带来了很多不便。因此,我们在普通的环氧树脂的大分子上引入各种强亲水基团,如羟基、羧基或者使之醚化,从而使得环氧树脂具有水溶性或者自乳化功能。同时,这种改性后的水性环氧树脂本身也是一种非离子表面活性剂,它的应用也有待研究。更多还原

【Abstract】 Epoxy resin has the feature of high adhesion strength,steady in performance, low shrinkage,high mechanical strength,good resistance to electricity and good processability.It is widely used in many fields of national economy.For instance,it is used as agglutination agent of metallic material and non-metallic material corrosion resistance coating,insulating material,glass fiber reinforced plastics/ compound material.But epoxy resin also has some defect,which restricted its apply field.People tried to increase its function by the method of modification.Among them,adding particle to epoxy resin system is one of the effective methods.The main body of the paper is to add WS-12 particle to the synthetical epoxy resin or industrial epoxy resin, their mechanical properties increased greatly.Besides,pure epoxy resin is hydrophilic, but WS-12 particle has very strong hydrophobic property,so epoxy resin adding WS-12 particle has improved hydrophobic property.In the application of epoxy resin,curing agent is very important.Pure epoxy resin under general condition can not be solidified.Only when adding a curing agent, composing formula resin,under certain condition,can it be solidified,making it has mechanical strength.Therefore,curing agent’s modification is one of the main directions of epoxy resin’s study.This paper lengthen general curing agent’s molecule chain by the fact that adding certain amounts of reinforcing agent to the curing system,making them react several hours under certain condition.At the same time it adds a few function groups to the chain that is reactive to epoxy group,successfully changing curing agent’s nature.The curing agent after modification can react to epoxy resin under certain condition,its cross-linking density increased since the function groups which can react to epoxy resin increase.So the three dimensional solidification has much better mechanical properties,conforming feasible epoxy resin.A majority of epoxy resin is insoluble in water,dissolve in organic solvents such as aromatic hydrocarbon and ketone.But organic solvents have some shortcomings such as inflammable,easy to explode,easy to deleterious,contaminating environment, which cause much inconvenience to the storation and transportation and construction of the curing agent.Therefore,we put hydrophilic group into regular epoxy resin molecule,such as hydroxy,carboxyl or etherification of making.Then this feasible epoxy resin is water soluble or has self emulsification function.At the same time,this hydrophilic epoxy resin is also a kind of nonionic surface-active agent,its application remains to be studied.更多还原