Jiao Xiaojiao, Song Yan, He Na, Wang Xiaojia, Huang Ming, Zhang Lu, Li Xiaocheng, Xu Jinchang, Chen Jie, Li Wenqing, Lai Guoqiao, Hua Xilin, Yang Xiongfa
College of Material, Chemistry, and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, China.
Hebei Houfeng Silicone Products Co., Ltd., Wenan County, Hebei 065000, China.
ACS Omega. 2022 Apr 6;7(15):12680-12689. doi: 10.1021/acsomega.1c06959. eCollection 2022 Apr 19.
High tensile strength UV-cured transparent materials are highly desired in optical devices. In this paper, high tensile strength UV-cured transparent castor oil-based polyurethane acrylates (PUAs) with a very high transmittance over 95% (400-800 nm) were prepared from UV-curable castor oil-based polyurethane acrylates (CO-PUAs) and mercapto silicone-containing hyperbranched polymers (HBPSHs) under UV irradiation. The tensile strengths of UV-cured transparent castor oil-based PUAs can reach 12.49 MPa, which is obviously higher than that of UV-cured CO-PUAs reported previously (0.7-10.20 MPa). The chemical structure of HBPSHs will play an important role in the mechanical performance of UV-cured silicone-modified materials, and it can be concluded that the more rigid the units of α,β-dihydroxyl derivatives used in the fabrication of HBPSHs are, the higher the mechanical strength and pencil hardness of the UV-cured materials will be.
光学器件中非常需要高拉伸强度的紫外线固化透明材料。本文通过紫外线固化的蓖麻油基聚氨酯丙烯酸酯（CO-PUAs）和含巯基有机硅的超支化聚合物（HBPSHs）在紫外线照射下制备了高拉伸强度的紫外线固化透明蓖麻油基聚氨酯丙烯酸酯（PUAs），其在400-800nm范围内具有超过95%的非常高的透光率。紫外线固化透明蓖麻油基PUAs的拉伸强度可达12.49MPa，明显高于先前报道的紫外线固化CO-PUAs的拉伸强度（0.7-10.20MPa）。HBPSHs的化学结构将对紫外线固化有机硅改性材料的机械性能起重要作用，可以得出结论，用于制备HBPSHs的α,β-二羟基衍生物的单元越刚性，紫外线固化材料的机械强度和铅笔硬度就越高。
