Study on Hydrogen Bonding of Moisture-curable Polyurethane Adhesive during Natural Aging

Hong-cui SHI; Li-qing SONG; Bo ZHANG; Zu-qiu MAO; Wei-qin YAO; Guo-zhang MA

doi:10.14028/j.cnki.1003-3726.2021.08.005

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Study on Hydrogen Bonding of Moisture-curable Polyurethane Adhesive during Natural Aging

更新时间：2022-08-30

- Study on Hydrogen Bonding of Moisture-curable Polyurethane Adhesive during Natural Aging
- Polymer Bulletin Vol. 34, Issue 8, Pages: 36-43(2021)
- 作者机构：
  
  山西省应用化学研究所(有限公司),涂装高分子功能材料山西省重点实验室,太原 030027
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2021.08.005
  CLC：
- Published：20 August 2021，
  
  Received：14 January 2021，
  
  Revised：18 June 2021，
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Hong-cui SHI, Li-qing SONG, Bo ZHANG, Zu-qiu MAO, Wei-qin YAO, Guo-zhang MA. Study on Hydrogen Bonding of Moisture-curable Polyurethane Adhesive during Natural Aging. [J]. Polymer Bulletin 34(8):36-43(2021)
DOI：

Hong-cui SHI, Li-qing SONG, Bo ZHANG, Zu-qiu MAO, Wei-qin YAO, Guo-zhang MA. Study on Hydrogen Bonding of Moisture-curable Polyurethane Adhesive during Natural Aging. [J]. Polymer Bulletin 34(8):36-43(2021) DOI： 10.14028/j.cnki.1003-3726.2021.08.005.

摘要

采用聚氧化丙烯二醇(PPG)、二苯基甲烷二异氰酸酯(MDI-50)、1

4-丁二醇(BDO)及二月桂基二丁基锡(T-12)

双吗啉基二乙基醚(DMDEE)与自制复合催化剂

获得3种不同催化剂作用下的湿固化聚氨酯胶粘剂。通过FTIR对自然陈化过程中氨酯羰基氢键化和脲羰基氢键化进行分析

采用T-剥离测试陈化过程粘结强度。结果表明

陈化过程中

随着游离氨酯羰基减少

氢键化氨酯羰基增多

而游离脲羰基与氢键化脲羰基没有明显的相关性。使用T-12、DMDEE

随着陈化时间延长

聚氨酯胶粘剂微相分离程度增强

总氢键化程度增大

而使用复合催化剂

作用相反。聚氯酯胶粘剂粘结强度与总氢键化程度及氢键化脲羰基相关。

Abstract

A number of moisture-curable urethane prepolymers(MCPU)were synthesized by propyleneglycol(PPG)

4'-diphenylmethane diisocyanate (MDI-50)

4-butanediol (BDO )

using Lauryl dibutyltin (T-12)

2- dimorpholinodiethylether(DMDEE)

self-made composite catalyst

respectively. Fourier transform infrared spectroscopy was used to characterize the assignment of hydrogen bonds of urethane carbonyl groups and urea carbonyl groups during natural ageing in MCPUs. In addition

the adhesion strength of the cured polyurethane adhesive was determined by tensile shear strength test. The result showed that natural ageing the number of hydrogen bonding urethane groups was raised with the decrease of free urethane groups

no significant relationship free urea carbonyl groups and hydrogen bonding urea groups. Total hydrogen bonding was increased by one kind of catalyst(T-12

DMDEE)nature ageing processes

at the same time microphase separation was promoted. Or reduced by self-made composite catalyst. The adhesion strength was correlation between total hydrogen bonding degree and hydrogen bonding urea groups.

关键词

湿固化聚氨酯胶粘剂催化剂自然陈化氢键作用

Keywords

Moisture-curablePolyurethane adhesiveCatalystNatural ageingHydrogen bond

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