文献类型：期刊文献

中文题名：聚氨酯衍生物大单体对聚醋酸乙烯酯胶黏剂性能的影响

英文题名：Effect of Polyurethane Derivatives on Performance of Poly(vinyl acetate) Emulsion Adhesive

作者：邵艺芳[1];钱军[1];刘强[1];彭赛[1];寇文娟[1]

机构：[1]华东理工大学材料科学与工程学院特种功能高分子材料及相关技术教育部重点实验室,上海200237

年份：2019

卷号：45

期号：1

起止页码：31

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

语种：中文

中文关键词：聚氨酯衍生物;聚醋酸乙烯酯;胶黏剂;热稳定性;力学性能

外文关键词：PU derivative;poly(vinyl acetate);adhesive;thermal stability;mechanical performance

摘要：为了提升聚醋酸乙烯酯(PVAc)乳液胶黏剂的热性能和力学性能,制备了5种不同分子量的聚氨酯衍生物大单体,将其与醋酸乙烯酯等主单体进行半连续种子乳液共聚合,得到了5种聚氨酯衍生物大单体接枝改性的PVAc乳液胶黏剂。结果表明,随着聚氨酯衍生物大单体分子量的增大,改性后PVAc乳液胶黏剂体系内软段数目增多,玻璃化转变温度降低,粒径、乳胶膜的表面粗糙度及持黏力增大,热稳定性、初黏力及180°剥离强度先上升后下降;当多元醇为分子量600的聚乙二醇(PEG-600)时,聚氨酯衍生物大单体改性后的PVAc乳液胶黏剂的综合性能最佳。
To improve the thermal stability and mechanical performance of poly(vinyl acetate)(PVAc)emulsion adhesive,polyurethane(PU)derivatives were synthesized to prepare PVAc emulsion adhesives with core-shell structure by semi-batch seeded emulsion polymerization.PU derivatives were designed as soft shell and the PVAc as the hard core.Meanwhile,the effects of molecular weights of PU derivatives on the microstructure,thermal stability and mechanical performance of PVAc emulsion adhesive were investigated.The molecular weights of PU derivatives changed with the molecular weights of poly(ethylene glycol).The Fourier transform infrared spectroscopy(FT-IR),transmission electron microscopy(TEM),atomic force microscope(AFM)and particle size analyzer were employed to determine the chemical composition,microstructure and the surface roughness of PVAc emulsion adhesives.Gel content and differential scanning calorimeter(DSC)were used to analyze the relationship between the structures and properties of PVAc adhesives.The thermogravimetric analysis(TGA),180° peel force,loop tack and shear resistance were performed to identify the thermal stability and mechanical properties of PVAc emulsion adhesives.The results showed that with the increasing of the molecular weights of PU derivatives,the gel content and particle size of PVAc emulsion adhesive increased,and the thermal stability and adhesion strength of PVAc emulsion adhesive greatly enhanced,while the glass transition temperature(Tg)decreased.However,if the molecular weight of PU derivative was too big,the thermal stability and adhesion strength of PVAc emulsion adhesive decreased.Therefore,a PU derivative with optimal molecular weight to modify the PVAc emulsion adhesive was found,and the most proper molecular weight of poly(ethylene glycol)was 600.