光固化甲基丙烯酸异冰片酯-水性聚氨酯的制备及性能研究

doi:10.3969/j.issn.0253-2417.2021.03.010

摘要/Abstract

摘要：

将甲基丙烯酸异冰片酯（IBOMA）、丙烯酸丁酯（BA）与市售的水性聚氨酯（WPU）共混并通过光固化使丙烯酸单体混合物（IBOMA/BA）在水性聚氨酯中进行共聚，制备了一系列IBOMA与BA改性水性聚氨酯（IMAWPU）膜，当IBOMA用量为0、1%、2%和4%时分别制得IMAWPU-0、IMAWPU-1、IMAWPU-2和IMAWPU-3。采用红外光谱（FT-IR）对固化后的水性聚氨酯（WPU和IMAWPU）结构进行了表征，并利用SEM、AFM、TG和DSC分析了水性聚氨酯形貌及其性能，结果表明：IBOMA与BA在水性聚氨酯中发生了共聚，随着IBOMA用量的增加，水性聚氨酯的表面粗糙度增加，初始分解温度由185℃增加到了195℃，热稳定性增加，玻璃化转变温度（T_g）提高。随着IBOMA用量的增加，水性聚氨酯的交联密度增加，拉伸强度逐渐增加，其中IMAWPU-2的性能较优，与纯WPU相比拉伸强度由0.9 MPa提升到了9.3 MPa，吸水率由178%下降到了31%，膜硬度由2B增加到了2H，交联密度由0.058 mmol/cm³增加到6.36 mmol/cm³。

关键词: 甲基丙烯酸异冰片酯, 共聚, 刚性环, 水性聚氨酯

Abstract:

Isobornyl methacrylate(IBOMA) and butyl acrylate(BA) were blended with waterborne polyurethane(WPU), by which these monomers(IBOMA/BA) copolymerized in waterborne polyurethane irradiated by UV light forming a series of IBOMA and BA modified waterborne polyurethane(IMAWPU) films. With the same approach, IMAWPU-0, IMAWPU-1, IMAWPU-2, IMAWPU-3 were prepared with the amount of IBOMA of 0, 1%, 2% and 4%, respectively. The structure of the cured waterborne polyurethane(WPU and IMAWPU) was characterized by FT-IR, and the morphology and performance of the waterborne polyurethane were analyzed. The results of FT-IR, SEM, AFM, and DSC showed that IBOMA and BA were copolymerized in waterborne polyurethane. With the increase of IBOMA content, the surface roughness, initial decomposition temperature as well as the thermal stability, and glass transition temperature of waterborne polyurethane increased. The initial decomposition temperature increased from 185℃ to 195℃. The performance research showed that with the increase of IBOMA content, the crosslinking density and tensile strength of waterborne polyurethane increased gradually, and the performance of IMAWPU-2 was better. Compared IMAWPU-2 with pure WPU, the tensile strength increased from 0.9 MPa to 9.3 MPa, the water absorption decreased from 178% to 31%, the pencil hardness increased from 2B to 2H, and the crosslinking density increased from 0.058 mmol/cm³ to 6.36 mmol/cm³.

Key words: isobornyl methacrylate, copolymerization, rigid ring, waterborne polyurethane

中图分类号:

TQ35

董阜豪, 钱约翰, 王钰棋, 林详宇, 徐徐, 王石发. 光固化甲基丙烯酸异冰片酯-水性聚氨酯的制备及性能研究[J]. 林产化学与工业, 2021, 41(3): 71-76.

Fuhao DONG, Yuehan QIAN, Yuqi WANG, Xiangyu LIN, Xu XU, Shifa WANG. Preparation and Performance of UV-curable Isobornyl Methacrylate-waterborne Polyurethane[J]. Chemistry and Industry of Forest Products, 2021, 41(3): 71-76.

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参考文献 19

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