硅橡胶
材料科学
天然橡胶
硫化
流变学
复合材料
聚二甲基硅氧烷
共价键
动态力学分析
硅酮
傅里叶变换红外光谱
化学工程
聚合物
化学
有机化学
工程类
作者
Jiang Zhao,Nan Jiang,Dongsheng Zhang,Bo He,Xian Chen
出处
期刊:Polymers
[MDPI AG]
日期:2020-05-24
卷期号:12 (5): 1196-1196
被引量:19
标识
DOI:10.3390/polym12051196
摘要
Polyborosiloxane gel (PBS-gel) with shear hardening properties was prepared by cross-linking boric acid and hydroxyl-terminated polydimethylsiloxane through B–O–Si dynamic covalent bonding. The prepared PBS gel was mixed with methyl vinyl silicone rubber (MVQ), and a benzoyl peroxide (BPO) cross-linking agent was added to vulcanize the silicone rubber. At the same time, the gel molecules were co-vulcanizing with MVQ to produce molecular cross-linking. The effects of PBS-gel on the damping properties of silicone rubber were analyzed by dynamic rheological test, Fourier transform infrared spectroscopy and dynamic mechanical analysis. The results demonstrated that the damping performance of MVQ/PBS rubber is greatly improved and the rubber has a tanδ > 0.3 in the range of −25~125 °C. The shear-hardening gel is uniformly dispersed in the system, due to the combined action of covalent bonds and intermolecular forces, which act as an active molecular chain that can efficiently dissipate and transfer energy inside the silicone rubber.
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