Phase structure and adhesion properties of acrylic block copolymer/tackifier blends as nanocomposite-like pressure-sensitive adhesives

编号 020030401

推送时间 20210816

研究领域 林产化工 

年份 2021 

类型 期刊 

语种 英语

标题 Phase structure and adhesion properties of acrylic block copolymer/tackifier blends as nanocomposite-like pressure-sensitive adhesives

来源期刊 JOURNAL OF APPLIED POLYMER SCIENCE

期 第304期

发表时间 20210713

关键词 adhesives;  copolymers;  surfaces and interfaces;  viscosity and viscoelasticity; 

摘要 In a blend of acrylic block copolymer consisting of poly(methyl methacrylate) and poly(n-butyl acrylate) blocks and a special rosin ester resin (RE) tackifier as a model pressure-sensitive adhesive (PSA), RE exists in two states: as nm-sized agglomerated particles (A) and as dissolved molecules (B). The effect of A and B ratio on the PSA properties were investigated using REs with four different weight-average molecular weights (M(w)s) in the range from 680 to 1700. The formation of A increased with increasing of M-w because of lowering of miscibility. The glass transition temperature increased with increasing of M-w. The tack at lower temperatures and the fracture energy were improved by B, whereas the tack at higher temperatures was improved by A. A and B enhanced the cohesive strength and the wettability of PSA, respectively. However, the improvement of cohesive strength by the RE with highest M-w was remarkably low. This seems to be caused by the larger size of agglomerated particles. H-1 pulse nuclear magnetic resonance analysis was useful for estimating the degree of A formation. The model PSA investigated in this study was nanocomposite-like.

服务人员 尚玮姣

服务院士 宋湛谦

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