Huang Zhendong, Jin Biqiang, Wu Haitao, Zeng Zihang, Huang Minghui, Wu Jinrong, Liao Lusheng, Zheng Jing
State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China.
Guangdong Provincial Key Laboratory of Nature Rubber Processing, Agricultural Products Processing Research Institute of Chinese Academy of Tropical Agricultural Science, Zhanjiang 524001, China.
Materials (Basel). 2022 Jun 3;15(11):3983. doi: 10.3390/ma15113983.
We propose a simple but rapid strategy to fabricate self-crosslinked dual-crosslinking elastomers (SCDCEs) with high mechanical properties. The SCDCEs are synthesized through one-pot copolymerization of Butyl acrylate (BA), acrylic amide (AM), and 3-Methacryloxypropyltrimethoxysilane (MEMO). Both the amino group on AM and the methoxy group on MEMO can be self-crosslinked after polymerization to form a dual-network crosslink consisting of hydrogen bonds crosslink and Si-O-Si covalent bonds crosslink. The SCDC endow optimal elastomer with high mechanical properties (the tensile strength is 6MPa and elongation at break is 490%) as the hydrogen bonds crosslink can serve as sacrificial construction to dissipate stress energy, while covalent crosslinking networks can ensure the elasticity and strength of the material. These two networks also contribute to the recoverability of the elastomers, leading them to recover their original shape and mechanical properties after being subjected to deformation in a short time.
我们提出了一种简单但快速的策略来制备具有高机械性能的自交联双交联弹性体（SCDCEs）。SCDCEs是通过丙烯酸丁酯（BA）、丙烯酰胺（AM）和3-甲基丙烯酰氧基丙基三甲氧基硅烷（MEMO）的一锅法共聚合成的。AM上的氨基和MEMO上的甲氧基在聚合后都可以自交联，形成由氢键交联和Si-O-Si共价键交联组成的双网络交联。由于氢键交联可以作为牺牲结构来耗散应力能量，而共价交联网络可以确保材料的弹性和强度，SCDC赋予了最佳弹性体高机械性能（拉伸强度为6MPa，断裂伸长率为490%）。这两个网络也有助于弹性体的可恢复性，使其在短时间内受到变形后能够恢复其原始形状和机械性能。
