塑料科技2025，Vol.53Issue(2)：38-42,5.DOI:10.15925/j.cnki.issn1005-3360.2025.02.007
端羟基聚丁二烯改性水性聚氨酯的合成及性能研究
Synthesis and Properties Study of Water-based Polyurethane Modified by Hydroxy-terminated Polybutadiene
罗晓岚 1付洪娥 2王奥 2史健泽 2孙玉宸 2王新 1郝永胜3
作者信息
- 1. 沈阳化工大学材料科学与工程学院,辽宁 沈阳 110142||沈阳化工研究院有限公司,辽宁 沈阳 110020
- 2. 沈阳化工研究院有限公司,辽宁 沈阳 110020
- 3. 沈阳化工大学材料科学与工程学院,辽宁 沈阳 110142
- 折叠
摘要
Abstract
The prepolymer was synthesized using hydroxyl-terminated polybutadiene(HTPB),poly(butylene adipate)(PBA2000),isophorone diisocyanate(IPDI),1,4-butanediol(BDO),ethylenediamine(EDA),and 2,2-dimethylolpropionic acid(DMPA)as the main raw materials.The prepolymer was then neutralized with triethylamine(TEA)to obtain HTPB-modified waterborne polyurethane.In the prepolymerization process,the molar ratio of isocyanate group(—NCO)and hydroxyl group(—OH)in the polyol was fixed 2.3∶1,the content of DMPA was 3.8%,and the waterborne polyurethane emulsion with a solid content of 38%(measured value)was finally prepared by adjusting the proportion of HTPB in the polyol.The effects of HTPB content in polyols on the particle size of emulsion,storage stability of emulsion,water resistance,mechanical properties,thermal stability were studied.The results show that with the gradual increase of the proportion of HTPB in polyols,the average particle size of waterborne polyurethane emulsion also increases,the stability gradually decreases,the glass transition temperature decreases first and then increases,and the lowest glass transition temperature can reach-46.84℃.The water absorption of the produced polyurethane films first increases and then decreases,while the water resistance first decreases and then increases,and the elongation at break and low-temperature flexibility both increase with the increase of the proportion of HTPB in the polyol.关键词
端羟基聚丁二烯/水性聚氨酯/低温柔韧性/改性聚氨酯Key words
Hydroxy terminated polybutadiene/Waterborne polyurethane/Low temperature flexibility/Modified polyurethane分类
化学化工引用本文复制引用
罗晓岚,付洪娥,王奥,史健泽,孙玉宸,王新,郝永胜..端羟基聚丁二烯改性水性聚氨酯的合成及性能研究[J].塑料科技,2025,53(2):38-42,5.
