Application Research of Pure Chemical Foaming Technology in the Development of Low Compressive Stress Relaxation Silicone Rubber Foam
Application of Pure Chemical Foaming Technology in the Development of Low Compressive Stress Relaxation Silicone Rubber Foam Materials Guo Fang Zhang Changsheng He Chuanlan Shi Yaogang Luo Shikai Wang Jianhua (Institute of Chemical Materials, China Academy of Engineering Physics, Sinyang 621900) Matching between agents and vulcanizing agents The effect of compressive stress relaxation on silicone rubber foams. At the same time, the effect of the foaming temperature and the secondary vulcanization time on the compressive stress relaxation of the foam was studied. The results show that the silicone rubber foam with lower compressive stress relaxation properties is successfully produced under the selected primary and secondary vulcanization foaming process conditions and suitable blowing agent and vulcanizing agent.
Silicone rubber foam material has the advantages of large compression deformation, aging resistance, wide temperature range, etc., and has attracted attention in various fields. The silicone rubber foam material with small compression stress relaxation and low compression set is the focus of research by researchers.
The research on silicone rubber foam with low compressive stress relaxation property is helpful for the rational design of the structure in the corresponding part, and the basic research on the physical index under the corresponding conditions, the development and actuality of the whole silicone rubber foam material. Applications and other important values ​​are Jiang Jie, Wu Qing. Research progress in atactic polypropylene. New chemical materials, 1999 Lu Huizhen. Trial trial production and quality improvement of block copolymerized polypropylene EPS30R.
(Continued from page 58) 3 Conclusion In the formulation system studied, the blowing agent and vulcanizing agent were used at a ratio of 6:1.5, and the vulcanization foaming curves of the two were the best. When the amount of the foaming agent is 6 parts, the compressive stress relaxation performance of the silicone rubber foam material is optimal at a single foaming temperature of 130 ° C and a secondary curing time of 20 min.
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