气相法白炭黑对脱醇型硅酮胶的性能影响
2021-04-27潘聪陈炳耀彭小琴全文高韦远怡
潘聪 陈炳耀 彭小琴 全文高 韦远怡



摘 要:选择107 硅橡胶(α,ω- 二羟基聚二甲基硅氧烷)为基胶,选择气相法二氧化硅作为补强填料,添加适量的交联剂、偶联剂、催化剂等功能性助剂,研制一种有着优良的力学性能的脱醇型性硅酮胶。探究气相法白炭黑对脱醇型硅酮胶的稠度、拉伸强度、断裂伸张率和贮存期的影响。经试验发现,高比表面积的白炭黑对脱醇性硅酮胶的挤出性和补强效果更好;经过热贮处理后的气相法白炭黑能够提高脱醇型硅酮胶的贮存期。
关键词:107胶;气相法白炭黑;拉伸强度;贮存期
中图分类号:TQ436 文献标识码:A 文章编号:1001-5922(2021)08-0039-03
The effect of fumed silica on the performance of dealcoholized silicone rubber
Pan Cong1, Chen Bingyao1, Peng Xiaoqin1, Quan Wengao1, Wei Yuanyi2
(1.Guangdong Sanvo Chemical Industry Technology Co., Ltd., Zhongshan 528429, China; 2.Guangdong Sanvo Holdings Co., Ltd.,Zhongshan 528325,China)
Abstract:Choose 107 silicone rubber (α,ω-dihydroxy polydimethylsiloxane) as the base rubber, choose fumed silica as the reinforcing filler, and add an appropriate amount of crosslinking agent, coupling agent, catalyst and other functions Sex additives, developed a dealcoholized silicone rubber with excellent mechanical properties. Explore the effect of fumed silica on the consistency, tensile strength,elongation at break and storage period of dealcoholized silicone rubber. It is found through experiments that the high specific surface area white carbon black has better extrudability and reinforcing effect on the dealcoholized silicone rubber; the gas phase white carbon black after heat storage treatment can improve the storage period of the dealcoholized silicone rubber.
Key words:107 glue; fumed silica; tensile strength; storage period
0 引言
白炭黑即SiO2,最早是在1940年被德國化工公司迪高沙研发出来,原材料选择的是四氯化硅[1],通过高温火焰水解所制得,原生粒子的颗粒大小约7~40 nm。经过数十年的发展,后人们改进了气相法白炭黑的生产工艺,从而形成了多类型、多功能特性的产品树。气相法白炭黑来源广泛,有着高比表面积和纳米尺寸效应等的优点,已经成为补强材料的重要选择 [1]。通过白炭黑和聚合物基体所制得的材料,同时兼备两者的性能,在各个领域都有着广泛的应用 [2]。未经补强硅橡胶力学性能较差,实用价值低,因此在工业中,选择的补强材料一般是较高的比表面积气相法白炭黑,能明显增加硅橡胶的强度。气相法白炭黑不仅可以让硅橡胶产品力学性能有所提升,还能够硅橡胶产品的颜色呈现出多样化,满足不同领域的个性化需求[3]。……
