有机硅材料
有機硅材料
유궤규재료
SILICONE MATERIAL
2013年
6期
419-422
,共4页
薛亮忠%林晓丹%马文石%罗钟瑜
薛亮忠%林曉丹%馬文石%囉鐘瑜
설량충%림효단%마문석%라종유
乙烯基三甲氧基硅烷%八聚乙烯基笼型倍半硅氧烷%点击反应%γ-巯丙基三乙氧基硅烷%室温硫化%硅橡胶%八聚 (三乙氧基硅丙巯基二亚甲基) 笼型倍半硅氧烷
乙烯基三甲氧基硅烷%八聚乙烯基籠型倍半硅氧烷%點擊反應%γ-巰丙基三乙氧基硅烷%室溫硫化%硅橡膠%八聚 (三乙氧基硅丙巰基二亞甲基) 籠型倍半硅氧烷
을희기삼갑양기규완%팔취을희기롱형배반규양완%점격반응%γ-구병기삼을양기규완%실온류화%규상효%팔취 (삼을양기규병구기이아갑기) 롱형배반규양완
octavinyloctasilsesquioxane%click chemistry%(γ-mercaptoprop-yl) triethoxysilane%room temperature cured%silicone rubber%octapoly ( triethoxysilcrylic thiol methylene ) cage siloxane
以乙烯基三甲氧基硅烷为原料，制备了八乙烯基笼型倍半硅氧烷（ OvPOSS ）；再与γ-巯丙基三乙氧基硅烷（ KH 580）进行巯基-烯点击反应，合成八聚（三乙氧基硅丙巯基二亚甲基）笼型倍半硅氧烷（ POSS-TEOST）；将POSS-TEOST加入室温硫化（ RTV）硅橡胶中，考察了其用量对RTV硅橡胶性能的影响。采用1 H/13 C/29 Si NMR、 FT-IR等对POSS-TEOST进行了表征，并研究了POSS-TEOST用量对RTV硅橡胶热性能、力学性能、硬度的影响。结果表明，在OvPOSS与KH 580的量之比为1∶8时， OvPOSS上8个乙烯基全部与巯基进行了反应；随着POSS-TEOST用量的增加，硅橡胶的热性能大幅度提升，氮气氛围中最大分解温度提高了75℃，在空气氛围中最大分解温度提高了124℃；此外，硅橡胶的拉伸强度和硬度分别提高了78％和55％。
以乙烯基三甲氧基硅烷為原料，製備瞭八乙烯基籠型倍半硅氧烷（ OvPOSS ）；再與γ-巰丙基三乙氧基硅烷（ KH 580）進行巰基-烯點擊反應，閤成八聚（三乙氧基硅丙巰基二亞甲基）籠型倍半硅氧烷（ POSS-TEOST）；將POSS-TEOST加入室溫硫化（ RTV）硅橡膠中，攷察瞭其用量對RTV硅橡膠性能的影響。採用1 H/13 C/29 Si NMR、 FT-IR等對POSS-TEOST進行瞭錶徵，併研究瞭POSS-TEOST用量對RTV硅橡膠熱性能、力學性能、硬度的影響。結果錶明，在OvPOSS與KH 580的量之比為1∶8時， OvPOSS上8箇乙烯基全部與巰基進行瞭反應；隨著POSS-TEOST用量的增加，硅橡膠的熱性能大幅度提升，氮氣氛圍中最大分解溫度提高瞭75℃，在空氣氛圍中最大分解溫度提高瞭124℃；此外，硅橡膠的拉伸彊度和硬度分彆提高瞭78％和55％。
이을희기삼갑양기규완위원료，제비료팔을희기롱형배반규양완（ OvPOSS ）；재여γ-구병기삼을양기규완（ KH 580）진행구기-희점격반응，합성팔취（삼을양기규병구기이아갑기）롱형배반규양완（ POSS-TEOST）；장POSS-TEOST가입실온류화（ RTV）규상효중，고찰료기용량대RTV규상효성능적영향。채용1 H/13 C/29 Si NMR、 FT-IR등대POSS-TEOST진행료표정，병연구료POSS-TEOST용량대RTV규상효열성능、역학성능、경도적영향。결과표명，재OvPOSS여KH 580적량지비위1∶8시， OvPOSS상8개을희기전부여구기진행료반응；수착POSS-TEOST용량적증가，규상효적열성능대폭도제승，담기분위중최대분해온도제고료75℃，재공기분위중최대분해온도제고료124℃；차외，규상효적랍신강도화경도분별제고료78％화55％。
High-purity octavinyloctasilsesquioxane ( OvPOSS) was obtained by hydrolysis and condensa-tion with vinyltriethoxysilane as the starting material .Then a new multi-ethoxy POSS ( POSS-TEOST ) was synthesized by reacting OvPOSS with (γ-mercaptopropyl) triethoxysilane (KH 580) via radical thiol addition click chemistry .The POSS-TEOST/PDMS composites were prepared by adding the POSS-TEOST into a RTV silicone rubber .The structure of the POSS-TEOST was characterized by 1 H/13 C/29 Si NMR and FT-IR.The effect of the POSS-TEOST on the thermal property , mechanical property and surface hardness of RTV silicone rubber was studied .Results show that the eight vinyl groups on the OvPOSS molecule reacted with the mercap-to groups completely at a mass ratio of OvPOSS to KH580 of 1∶8.As the mass of POSS-TEOST increases, the thermal property of silicone rubber is greatly improved , and the maximum decomposition temperatures in nitrogen and in air are increased by 75 ℃ and 124 ℃, respectively .In addition, the tensile strength and hardness of the silicone rubber are increased by 78%and 78%respectively .
