Page 202 - 《精细化工》2023年第2期

第 40 卷第 2 期 精 细 化 工 Vol.40, No.2
20 23 年 2 月 FINE CHEMICALS Feb. 2023

黏合剂
长烷基链对水性聚氨酯在非极性

基材上附着力的影响

丁李钰 1,2 ，黄毅萍 1,2* ，鲍俊杰 1,2 ，刘 皓 1,2

（1. 安徽大学 化学化工学院，安徽 合肥 230601；2. 安徽省绿色高分子材料重点实验室，水基高分子
材料安徽省工程技术研究中心，安徽 合肥 230601）

摘要：以聚己二酸新戊二醇酯（PNA）、二聚酸聚酯多元醇（BY3026）、异佛尔酮二异氰酸酯（IPDI）为主要原
料制备了一系列侧链含长链烷基的水性聚氨酯（WPU）乳液并制成胶膜。通过 FTIR、DSC 表征了胶膜的
结构和热性能，测试了乳液粒径及胶膜的力学性能、吸水率、接触角以及其在双向拉伸聚丙烯薄膜（BOPP）
上的附着力。结果表明，当 m(BY3026)∶m(PNA)从 0∶1 增加到 3∶5，WPU 乳液粒径增大，胶膜的耐水性
增强，表面能先减小后增大，拉伸强度和断裂伸长率从 52.6 MPa 和 2607.2%分别降低至 38.7 MPa 和 1911.2%。
2
当 m(BY3026)∶m(PNA)=2∶5 时，制备的 WPU 胶膜表面能为 35.43 mJ/m ，WPU 乳液在 BOPP 薄膜上的 T-剥
离强度为 2.98 N/25 mm。
关键词：水性聚氨酯；二聚酸聚酯多元醇；双向拉伸聚丙烯薄膜；表面能；黏合剂
中图分类号：TQ323.8 文献标识码：A 文章编号：1003-5214 (2023) 02-0424-06

Effect of long alkyl side chain on adhesion of waterborne
polyurethane on non-polar substrate

1,2
1,2
1,2
DING Liyu , HUANG Yiping 1,2* , BAO Junjie , LIU Hao
（1. College of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, Anhui, China; 2. Anhui Key
Laboratory of Green Polymer Materials, Water-based Polymer Materials Anhui Engineering Technology Research
Center, Hefei 230601, Anhui, China）

Abstract: A series of waterborne polyurethane emulsions containing long alkyl side chains were prepared
from polyneopentyl adipate (PNA), dimer acid polyester polyol (BY3026) and isophorone diisocyanate
(IPDI). The structure and thermal property of the films were characterized by FTIR and DSC. The particle
size of the emulsions, mechanical strength, water absorption rate, contact angle of the films and their
adhesion on biaxially oriented polypropylene film (BOPP) were then tested and analyzed. The results
showed that when m(BY3026)∶m(PNA) increased from 0∶1 to 3∶5, both the particle size of the
emulsion and the water resistance of the film increased, and the surface energy first decreased and then
increased, while the tensile strength and elongation at break decreased from 52.6 MPa and 2607.2% to 38.7
MPa and 1911.2%, respectively. The polyurethane prepared with m(BY3026)∶m(PNA)=2∶5 exhibited
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the best compatibility with BOPP film, with the surface energy of 35.43 mJ/m , and the T-peel strength on
BOPP film of 2.98 N/25 mm.
Key words: waterborne polyurethane; dimer acid polyester polyols; biaxially oriented polypropylene films;
surface energy; adhesivess

收稿日期：2022-07-19; 定用日期：2022-09-15; DOI: 10.13550/j.jxhg.20220678
基金项目：安徽省高校科学研究项目（KJ2018ZD004）
作者简介：丁李钰（1996—），女，硕士生，E-mail：2398170078@qq.com。联系人：黄毅萍（1966—），男，教授，E-mail：yphuang2001@
sina.com。