Damping of vinyl acetate-n-butyl acrylate copolymers
Damping of vinyl acetate-n-butyl acrylate copolymers
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DOI：
10.1002/app.13266
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发表时间：
2004-02-05
影响因子：
3
通讯作者：
Huang, WG
中科院分区：
文献类型：
--
作者：
Chu, HH;Lee, CM;Huang, WG
本研究设计了一种室温光聚合工艺，主要将醋酸乙烯酯（VAc）与丙烯酸正丁酯（BA）共聚，制备具有压敏粘接性能的类橡胶阻尼片。用差示扫描量热仪和流变动力学分析的研究表明，每种共聚物都存在两个玻璃化转变温度。扫描电镜图显示，在70°c时，微相分离程度随退火时间的延长而增加。结果表明，由PBA块体组成的橡胶畴分散在由PVAc块体组成的玻璃畴中，形成了有效的阻尼实体。共聚物样品具有良好的阻尼性能，在一定温度范围内，δ峰值高达1.76-1.80，在相当宽的温度范围内，δ峰值为> 0.3。此外，含有较多VAc的共聚物往往具有较高的阻尼。(C) 2003 Wiley期刊有限公司植物学报，2004,31(2):393 - 398。
A photopolymerization process at room temperature was devised to copolymerize vinyl acetate (VAc) and n-butyl acrylate (BA) mainly to prepare rubber-like damping sheet bearing pressure-sensitive adhesive property in this study. The investigations using both the differential scanning calorimeter and rheometric dynamic analysis show the existence of two glass transition temperatures for each copolymer. The scanning electron microscopic pictures reveal that the degree of microphase separation increases with increasing annealing time at 70degreesC. It was suggested that the rubbery domain (formed by the PBA blocks) disperses in the glassy domain (constituted by the PVAc blocks), making an effective damping entity. Excellent damping was observed for the copolymer samples, with the tandelta peak values as high as 1.76-1.80 at a certain temperature range and with tandelta> 0.3 at quite wide temperature ranges. In addition, the copolymers containing more VAc tend to have the higher damping. (C) 2003 Wiley Periodicals, Inc. J Appl Polyrn Sci 91: 1396-1403,2004.