有机硅改性丙烯酸树脂的研究.pdf

西北工业大学
硕士学位论文
有机硅改性丙烯酸树脂的研究
姓名:杨玉玮
申请学位级别:硕士
专业:应用化学
指导教师:张爱波
20070301
两北T业大学硕十学位论文
摘要
有机硅聚合物具有优异的耐候性、耐玷污性和耐高低温性,高度的疏水性,
良好的透气性等被广泛应用。将有机硅引入有机合成树脂中,可使有机硅和有
机合成树脂的性能更加完善,这对有机硅和有机合成树脂工业发展具有重大的
意义。因此有机硅改性有机树脂是近年来研究的热点。丙烯酸树脂具有优良的
粘附性和良好的力学性能、化学稳定性,而且原料来源丰富、成本低廉。但丙
烯酸树脂对温度极为敏感而且耐水性和耐玷污性差。因此利用有机硅改性,可
大大改善丙烯酸树脂的性能。
本文利用有机硅采用物理和化学方法对丙烯酸树脂进行改性研究。
通过Fox方程设计丙烯酸树脂的玻璃化温度(理论值)以确定各类丙烯酸
单体的配比,对所得到的丙烯酸树脂性能进行了讨论分析。结果表明Tg-25℃
的丙烯酸树脂性能较好。
采用Y-甲基丙烯酰氧基丙基三甲氧基硅烷(KH-570)单体,在催化剂作
用下利用水解缩聚的方法制备了聚有机硅氧烷。通过红外分析判定合成产物的
组成结构,研究了水解时间对合成产物性能影响。研究表明,水解所得聚合
物可满足要求。
将聚有机砫氧烷和丙烯酸树脂物理共混,通过SEM研究共混物的相容情
况,通过各项性能分析研究了物理共混改性的效果。结果表明,当有机硅含量
为8%时,有机硅聚合物均匀地分教在丙烯酸树脂中,而且综合性能最好。
利用含双键的有机硅单体y-甲基丙烯酰氧基丙基三甲氧基硅烷(KH-570)
与丙烯酸(酯)单体自由基共聚合,通过化学方法对丙烯酸树脂进行改性。通
过R和'HNMR进行结构表征,通过SEM研究产物的相态,通过各项性能分
析确定有机硅单体含量,探讨化学改性的效果,并比较物理改性和化学改性两
种方法影响效果。结果表明KH-570的双键与丙烯酸(酯)单体的双键发生了
聚合,丙烯酸树脂分子链上通过化学反应连接了有机硅单体。产物是均一相的,
当有机硅含量为10%时的聚合物性能最好。
物理共混法和化学改性法都能改进丙烯酸树脂的性能。改性后的树脂具有
丙烯酸树脂和有机砫聚合物的优点。具有优异的粘接性、耐水性、耐玷污性、
耐酸碱盐性、耐热性和力学性能。比较物理改性和化学改性两种方法的改性效
果,证明了化学改性能够更好地提高丙烯酸树脂的性能。
摘要
关键词;有机硅,丙烯酸树脂,物理共混,化学改性
两北业大学硕十士学位论文
Abstract
Polysilicone has been widely used in weather resistance, solution resistance, high
and low temperature resistance, high hydrophobicity property and high air permea
bility property. Polysilicone is used to improve the properties of other synthetic
resins. This is of great significance in both polysilicone and synthetic resins industry
So recent years more and more people do the researches about modifying synthetic
with polysilicone. Acrylate resin has many good properties, such as excellent
adhesive character, mechanical charact- er, chemical stability, rich material and low
cost. But it is sensitive to temperature, it has poor hydrophobicity property and
olution resistance. So modified by polysilicone, acrylate resins properties can be
improved
In this paper, two methods, physical blends and chemical modification, were used
to modify acrylate resin by polysilicone
Acrylate monomer ratio was computed by Fox equation which was used to design
the glass temperature(theoretical value)of acrylate resin. Acrylate resin's properties.
were discussed and analysed. The result showed that acrylate resin had the best
properties when T=25 C
Polysilicone was prepared by hydrolytic pol merization of Y-methacryoxypropytri
methoxysilane(kh-570)in condition of catalyzer. FTR was used to determinant the
structure of product. The effects of hydrolytic time on the capacity of products were
studied. According to the analysis of their properties, the product whose hydrolytic
time was 9h met demand
Polysilicone and acrylate resin were blended uniformly. The compatibility of
blends was researched using SEM. The best proportion and effect of physical blends
was discussed from the analysis of their properties. The result showed that, when the
content of polysilicone was 8%, polysilicone can uniformly disperse into acrylate
resin. It had the best properties
Chemical modification was carried out by the radical polymerization of KH-570
and acrylate monomer. The structure was studied using IR and HNMR. The phase