二氧化碳基聚氨酯丙烯酸酯紫外光固化树脂的制备

Preparation of Carbon Dioxide based Polyurethane Acrylate UV Curing Resin

摘要:

以CO2基聚碳酸亚丙酯二醇(PPCD)、二环己基甲烷二异氰酸酯(HMDI)、甲基丙烯酸羟丙酯(HPMA)、2,4,6-三甲基苯甲酰基-二甲苯基氧化膦(TMO)等原料制备了系列CO2基聚氨酯丙烯酸酯紫外光固化树脂(PUA)。通过FTIR、XRD、力学、TG、黏度等测试分析了紫外光固化树脂的结构与性能。结果表明,随着HMDI中异氰酸酯与PPCD中羟基的摩尔比n(-NCO):n(-OH)的增大,PUA样品膜的接触角、硬度和拉伸强度增大,树脂黏度、膜吸水率和断裂伸长率下降。当n(-NCO):n (-OH)为2:1时制备的紫外光固化树脂(PUA-4)综合性能最好,胶膜拉伸强度为32.9MPa,断裂伸长率为139.2%,接触角为86.9°,24h吸水率为8.20%,邵氏硬度为94HA。

Abstract:

A series of CO2 based polyurethane acrylate UV cured resins (PUA) were prepared using CO2 based poly(propylene carbonate) diol (PPCD), dicyclohexylmethane diisocyanate (HMDI), hydroxypropyl methacrylate (HPMA), 2,4,6-trimethylbenzoyl-dimethylphenyl phosphine oxide (TMO) and other materials. The structure and properties of UV cured resin were analyzed through tests such as FTIR, XRD, mechanics, TG and viscosity. The results showed that as the molar ratio n(- NCO):n(- OH) of isocyanates in HMDI to hydroxyl groups in PPCD increased, the contact angle, hardness and tensile strength of the PUA membrane increased, while the resin viscosity, film water absorption and elongation at break decreased. When the n(- NCO):n(- OH) was 2:1, the UV curable resin (PUA-4) showed the best comprehensive performance with the film tensile strength of 32.9 MPa and elongation at break of 139.2%. The contact angle of the film was 86.9°, the 24h water absorption was 8.20% and the Shore hardness was 94HA.