Preparation and properties of CO2-based polyurethane acrylate UV-curable resins

被引：0
作者：
Zhao, Mingming [1 ,2 ]
Bao, Junjie [1 ,2 ]
Huang, Yiping [1 ,2 ]
机构：
[1] School of Chemistry and Chemical Engineering, Anhui University, Anhui, Hefei
[2] Anhui Key Laboratory of Green Polymer Materials, Anhui Engineering Technology Research Center of Water-Based Polymer Materials, Anhui, Hefei
来源：
Jingxi Huagong/Fine Chemicals | 2024年 / 41卷 / 11期
关键词：
acrylate; carbon dioxide; functional materials; poly(propylene carbonate)diol; polyurethane; UV-curing;
D O I：
10.13550/j.jxhg.20231024
中图分类号：
学科分类号：
摘要：
A series of CO2-based polyurethane acrylate (PUA) UV-curable resins with different isocyanate hydroxyl ratio [the molar ratio of isocyanate group in dicyclohexylmethane diisocyanate (HMDI) to hydroxyl group in poly(propylene carbonate)diol (PPCD), the same below] were prepared using CO2 based-PPCD as soft segment, HMDI as hard segment, hydroxypropyl methacrylate (HPMA) as end-sealing agent and diluent, 2,4,6-trimethylbenzoyl-dimethylphenyl phosphine oxide (TMO) as photoinitiator, and irradiated by UV light to form PUA UV cured films. The effect of isocyanate hydroxyl ratio on the structure and properties of UV-curable resins and their films were investigated by FTIR, XRD, mechanical property, TGA and viscosity tests. The results showed that with the increase of isocyanate hydroxyl ratio, the water contact angle, hardness and tensile strength of PUA UV-curable films increased, while the viscosity of PUA UV-curable resin, and the water absorption and elongation at break of the films decreased. The PUA UV curable resin prepared with an isocyanate hydroxyl ratio of 2.0:1 (PUA-4 resin) and the corresponding PUA UV-curable film (PUA-4 film) showed the best comprehensive performances. The viscosity of PUA-4 resin was 1437 mPa·s. The tensile strength of PUA-4 film was 32.9 MPa, the elongation at break was 139.2%, the water contact angle was 86.9°, the water absorption rate for 24 h was 8.2%, and the Shore hardness was 94 HA. © 2024 Fine Chemicals. All rights reserved.
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页码：2433 / 2439
页数：6
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