CAJ | 학술논문

以乙烯基硅油、含氢硅油、导热填料、铂催化剂为原料，制成了空间级加成型双组分导热硅橡胶。研究了精制方法对乙烯基硅油真空质量损失率的影响以及填料种类、用量对硅橡胶性能的影响。结果表明，采用溶剂萃取法精制乙烯基硅油，可使乙烯基硅油的真空质量损失率降至0．47%，满足空间级材料的使用要求；硅橡胶的较佳配方是：黏度5000 mPa · s的乙烯基硅油100份，粒径5~8μm 的碳化硅240份，交联剂5份；在此条件下制得的加成型双组分导热硅橡胶的热导率为1．26 W/m·K、接触热导率在15000 W/m2·K以上、拉伸强度为1．68 MPa、真空质量损失率为0．27%、可凝挥发物质量分数为0．02%
이을희기규유、함경규유、도열전료、박최화제위원료，제성료공간급가성형쌍조분도열규상효。연구료정제방법대을희기규유진공질량손실솔적영향이급전료충류、용량대규상효성능적영향。결과표명，채용용제췌취법정제을희기규유，가사을희기규유적진공질량손실솔강지0．47%，만족공간급재료적사용요구；규상효적교가배방시：점도5000 mPa · s적을희기규유100빈，립경5~8μm 적탄화규240빈，교련제5빈；재차조건하제득적가성형쌍조분도열규상효적열도솔위1．26 W/m·K、접촉열도솔재15000 W/m2·K이상、랍신강도위1．68 MPa、진공질량손실솔위0．27%、가응휘발물질량분수위0．02%
The two-component space-grade addition cure thermal conductive silicone rubber was prepared with vinyl silicone oil, thermal-conductive filler, Pt catalyst and methyl hydro-silicone oil as the basic materi-als. The purifying method, types and contents of the fillers were discussed on the vacuum mass loss of vinyl silicone oil. Results showed that the total mass loss ( TML) of the polysiloxane extracted by n-hexane/alcohol component solvent was 0. 47%, which could meet the requirement of NASA. The silicone rubber was made by 100 phr of hydro-silicone oil with viscosity of 5 000 mPa·s, 240 phr of silicon carbide with particle size of 5~8 μm, and 5 phr of crosslinking agent. Thus, the silicone rubber with SiC had the thermal conductivity of 1. 26 W/m·K, contact heat-conduction coefficient above 15 000W/m2·K, tensile strength of 1. 68 MPa, TML of 0 . 27%, and mass fraction of CVCM was 0 . 02%.