Nopol as a member of the terpene family is a biorenewable substrate and used widely for the modification of materials. In this work, a series of bio-based cationic photopolymerizable polysiloxane oxacyclobutanes based on nopol with different silicone chain lengths (Nopol-Si_n, n = 3, 6, 9) were synthesized. They show good photopolymerization properties and are able to boost the photopolymerization of aliphatic epoxy monomer 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate (E4221). The final conversions of the epoxy group and oxetane group of E4221/Nopol-Si_n systems are 79.5% and about 69.0%, respectively. Cured films of E4221/Nopol-Si_n systems exhibit better hydrophobicity, thermostability and tensile properties compared with that of pure E4221 due to the saturated rigid bridge ring, and flexible and thermostable polysiloxane chain. The water contact angle of E4221/Nopol-Si_n systems reaches up to 98.7^o. With the increase of polysiloxane chain length, thermostability and tensile properties of E4221/Nopol-Si_n systems are boosted, whereas glass transition temperature (T_g) is decreased. Moreover, with the increase of Nopol-Si₉ content, thermostability and tensile properties of E4221/Nopol-Si₉ system present a trend of rise first and then decline, whereas T_g is continuously reduced. Furthermore, the cured film of E4221/Nopol-Si₃ system has excellent yellowing resistance.

Nopol 作为萜烯家族的一员，是一种生物可再生基材，广泛用于材料的改性。在这项工作中，合成了一系列基于具有不同有机硅链长的 nopol (Nopol-Si _n , n  = 3, 6, 9)的生物基阳离子光聚合聚硅氧烷氧杂环丁烷。它们显示出良好的光聚合性能，能够促进脂肪族环氧单体 3,4-环氧环己基甲基 3,4-环氧环己烷羧酸酯 (E4221) 的光聚合。E4221/Nopol-Si _n体系的环氧基和氧杂环丁烷的最终转化率分别为 79.5% 和约 69.0%。E4221/Nopol-Si _n固化膜与纯 E4221 相比，由于饱和的刚性桥环以及柔性和热稳定的聚硅氧烷链，系统表现出更好的疏水性、热稳定性和拉伸性能。E4221/Nopol-Si _n体系的水接触角高达 98.7 ^o。随着聚硅氧烷链长的增加，E4221/Nopol-Si _n体系的热稳定性和拉伸性能提高，而玻璃化转变温度（T _g）降低。此外，随着Nopol-Si ₉含量的增加，E4221/Nopol-Si ₉体系的热稳定性和拉伸性能呈现先上升后下降的趋势，而T _g不断减少。此外，E4221/Nopol-Si ₃系固化膜具有优异的耐黄变性。