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《合成橡胶工业》[ISSN:1000-1255/CN:62-1036/TQ]

期数:

2024年2期

页码:

87-92

栏目:

出版日期:

2024-03-15

文章信息/Info

Title:

Preparation and properties of condensed flame retardant ceramic silicone rubber

文章编号:

1000-1255（2024）02-0087-06

作者:

储甜甜; 邢叔文; 李子阳; 刘润竹; 张孝阿?鄢; 王成忠; 张军营

北京化工大学 材料科学与工程学院/碳纤维及功能高分子教育部重点实验室，北京 100029

Author(s):

CHU Tian-tian;  XING Shu-wen;  LI Zi-yang;  LIU Run-zhu;  ZHANG Xiao-a;  WANG Cheng-zhong;  ZHANG Jun-ying

College of Materials Science and Engineering / Key Laboratory of Carbon Fiber and Functional Polymers of Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China

关键词:

硅橡胶; 脱氢缩合; 陶瓷化; 物理机械性能; 阻燃性能; 热稳定性能

Keywords:

silicone rubber;  dehydrogenation condensation;  ceramization;  physical and mechanical property;  flame retardancy;  thermal stability

分类号:

TQ 333.93

DOI:

DOI:10.19908/j.cnki.ISSN1000-1255.2024.02.0087

文献标识码:

A

摘要:

以α，ω-端羟基聚硅氧烷为基体、复合陶瓷粉和气相白炭黑为填料，通过脱氢缩合制备了阻燃陶瓷化硅橡胶，考察了复合陶瓷粉用量、生胶侧基种类和烧蚀温度对阻燃陶瓷化硅橡胶性能的影响。结果表明，当复合陶瓷粉用量为120份（质量）时，含侧甲基的107硅橡胶的各项物理机械性能几乎同时达到最佳，拉伸强度4.69 MPa，扯断伸长率686%，邵尔A硬度48，弯曲强度12.29 MPa。相比于107硅橡胶和含侧苯基的108硅橡胶，由含侧甲基乙烯基的109硅橡胶制备的陶瓷化硅橡胶具有更好的热稳定性，1 000 ℃下的残炭质量分数高达86%；具有更优异的阻燃性能，极限氧指数为49.5%，垂直燃烧等级为V-0级；同时还具有更低的成瓷温度，在600 ℃时成瓷效果良好。

Abstract:

Flame retardant ceramic silicone rubber was prepared by dehydrogenation condensation using α,ω-hydroxy-terminated polysiloxane as matrix, and composite ceramic powder and fumed silica as fillers. The effects of the amount of composite ceramic powder, type of raw rubber side groups and ablation temperatures on the properties of the flame retardant ceramic silicone rubber were investigated. The results showed that the physical and mechanical properties of 107 silicone rubber containing side methyl group were almost the best when the amount of composite ceramic powder was 120 phr (mass), the tensile strength was 4.69 MPa, elongation at break was 686%, Shore A hardness was 48 and flexural strength was 12.29 MPa. Compared with 107 silicone rubber and 108 silicone rubber containing pendant phenyl group, the ceramic silicone rubber prepared from 109 silicone rubber containing pendant methyl vinyl group had better thermal stability, and the residual carbon mass fraction of composite up to 86% at 1 000 ℃. The ceramic silicone rubber from 109 silicone rubber had better flame retardancy, the limiting oxygen index was 49.5%, and the vertical combustion grade was V-0. In addition, it had a lower ceramization temperature and a good ceramization effect at 600 ℃.

参考文献/References

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备注/Memo

备注/Memo:

航天化学动力技术重点实验室开放基金资助项目（STACPL 120201 B 07）；山东省重大科技创新工程项目（2019 JZZY 020232）。

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更新日期/Last Update: 1900-01-01