有机硅丙烯酸酯共聚乳液压敏胶的合成与性能研究.pdf

苏州大学
硕士学位论文
有机硅丙烯酸酯共聚乳液压敏胶的合成与性能研究
姓名:邢朋
申请学位级别:硕士
专业:材料学
指导教师:谢洪德
20090501
有机硅丙烯酸酯共聚乳液压鳅胶的合成与性能研究
中文摘要
中文摘要
乳液型丙烯酸酯压敏胶由于不用溶剂,无污染,操作方便,安全等优点,具
有极快的发展速度,但是普遍存在着内聚力不足、耐水性差、剥离强度和初粘力
不够等缺点,其性能有待于进一步改进。本文以3一甲基丙烯酰氧丙基三甲氧基硅
烷(MPTS)、丙烯酸酯类单体为原料,制备了有机硅改性聚丙烯酸酯压敏胶。利用
有机硅中Si-0键能大、表面能低等特点来改善聚丙烯酸酯压敏胶的耐水性,耐
热性等性能。
采用有机硅单体延迟滴加及添加水解抑制剂等技术,有效防止3一甲基丙烯酰
氧丙基三甲氧基硅烷MPTS)在乳液聚合过程中的过度水解及缩合反应。利用红外
谱图分析发现,这两种手段配合使用,可有效地抑制有机硅氧烷的水解。同时,
研究了反应性乳化剂2一丙烯酰胺一2一甲基丙磺酸(AMPS)的反应活性、压敏胶的
粘结性能及耐水性。实验结果表明AMPS在乳液聚合中有较大程度反应,其对压
敏胶性能影响较大,特别是耐水性能有较大提高。
分别考察了乳化体系、引发剂、温度、功能单体和有机硅单体用量在制备有
机硅改性丙烯酸酯共聚乳液中对聚合稳定性的影响,并对所制备的有机硅改性丙
烯酸乳液压敏胶的组成、粒径大小及分布等进行了表征,研究了各因素对压敏
胶粘结性能的影响。重点考察了有机硅单体用量对压敏胶初粘、持粘、180°剥离强
度的影响。结果表明,当有机硅单体总量为单体的1%左右,聚合过程稳定,压敏
胶的综合性能得到提高。
关键词:有机硅反应性乳化剂乳液聚合压敏胶
作者:邢朋
指导老师:谢洪德
有机硅丙烯酸酯共聚乳液压胶的合成与性能研究
英文摘要
Preparation and Properties of Organosiloxane and
Acrylate Copolymeric Emulsion
Pressure-sensitive Adhesive
Abstract
The emulsion pressure sensitive adhesive is developed fast because of unused
solvent, no pollution, operating expediently It's defects are the low cohesion force, bad
resistance to water, low racking strength and so on, so the properties of emulsion
pressure sensitive adhesive need to be improve further. In this thesis, silicone modified
polyacrylate emulsion was prepared via seeded emulsion polymerization. AS
organosiloxane has large Si-o bond energy, low surface energy, the acrylate resins
modified with these monomers can show better performance
By using techniques of delaying addition of organosilicon monomer and a
hydrolysis inhibi or, the hydrolysis and condensation of 3-(rimethoxysilyl)propyl
methacrylate during polymerization can be effectively prevented. And by the reactivity
of the reactive emulsifier 2-acrylamido-2-methylpropanesulfonic acid(AMPS), the
adhesive bonding properties and water resistance of PSA were investigated. The results
indicate that the reactive emulsifier has been reacted to a large degree and it has a great
effect on the properties of PSA
The effect of surfactant system, initiator, temperature, functional monomer, ratio of
acrylate and content of siloxane on the stable polymerization process were investigated,
therefore, the basic processing parameters and production formula were determined
The composition and properties such as particle morphology, particle size and its
distribution of the obtained silicone-acrylate latex were characterized. Adhesion
properties were assessed by peel and holding power and tack adhesion testing in
accordance with MPTS mass. The result showed that when MPTS mass fraction is 1%