\r冯亚凯^{1, 2}，孟凡成¹，赵敬棋³，申景博\r³\r
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AuthorsHTML:\r冯亚凯^{1, 2}，孟凡成¹，赵敬棋³，申景博\r³\r
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AuthorsListE:\rFeng Yakai ^{1, 2}，Meng Fancheng¹，Zhao Jingqi³，Shen Jingbo\r³\r
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AuthorsHTMLE:\rFeng Yakai ^{1, 2}，Meng Fancheng¹，Zhao Jingqi³，Shen Jingbo\r³\r
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Unit:\r\r1. 天津大学化工学院，天津 300072；\r
\r\r2. 天津化学化工协同创新中心，天津 300072；
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\r3. 天津莱尔德电子材料有限公司，天津300457\r
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Unit_EngLish:\r1. School of Chemical Engineering and Technology，Tianjin University，Tianjin 300072，China；
2. Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)，Tianjin 300072，China；
3. Tianjin Laird Electronic Materials Co.，Ltd.，Tianjin 300457，China\r
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Abstract_Chinese:\r以乙烯基硅油为基础聚合物，以含氢硅油为交联剂，在Karstedt’s 催化剂的作用下，制备出加成型有机硅弹性体，并对体系的凝胶时间、固化反应历程、弹性体的交联密度和形成的交联网络进行了系统的表征．同时，探究了不同Si—H 含量的交联剂对固化后弹性体的渗油量、表面黏性和力学性能的影响．体系的固化反应历程通过差示扫描量热法来评价，交联密度通过测试弹性体在甲苯中的溶胀度得出，采用索氏提取法提取样品中可溶性物质，弹性体的渗油量通过析出失重法来表征，表面黏性通过测试样品与离型膜的剥离强度来评价．结果表明，以低Si—H 含量的含氢硅油为交联剂时，体系的凝胶时间较长，交联密度低，形成的交联网络更加完善，进而导致弹性体的渗油量明显降低，表面黏性和断裂伸长率显著增大，但其力学强度较差，从而限制了其进一步的应用．采用高、低Si—H 含量的含氢硅油并用的方式，通过调节两种交联剂的摩尔比例，制备得到了不同表面黏性的弹性体，并且可以调控弹性体的渗油量和力学性能，使其可以满足不同场合的使用要求．\r
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Abstract_English:\rAdditional silicone elastomers were prepared using vinyl-terminated silicone oil as base polymer，hydrogen-containing silicone oil as cross-linking agent, and platinum as Karstedt’s catalyst. Then，the gelation time，curing reaction process，cross-linking density，and cross-linked network of the elastomer were systematically investigated. Meanwhile，the effect of cross-linkers with different Si—H contents on the final material，including its oil bleeding，surface stickiness，and mechanical properties，were analyzed. The curing reaction process was evaluated using differential scanning calorimetry. The cross-linking density of the elastomer was deduced via the swelling method using toluene. The soluble matter in the sample was characterized using the Soxhlet extraction method. The oil bleeding was confirmed using the weight loss method，and the surface stickiness was assessed by peel strength between elastomer and release film. Results showed that when the hydrogen-containing silicone oil with low Si—H content was used as cross-linking agent，the gelation time of the system increased，but the cross-linking density decreased and the formed cross-linking network was perfect. Consequently, the ultimate properties of elastomers were distinctly different. The oil bleeding of the elastomer decreased significantly，and the surface stickiness and elongation at break were improved markedly. However，the mechanical strength of the elastomer was poor，which limited its further applications. Elastomers with different surface stickiness could be prepared by changing the ratio of hydrogen-containing silicone oil with different Si—H contents. Meanwhile，the oil bleeding and mechanical properties of the elastomer could also be adjusted；thus，it could meet the requirements under different conditions.\r
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Keyword_Chinese:交联剂；Si—H 含量；渗油；表面黏性；力学性能\r

Keywords_English:cross-linker；Si—H content；oil bleeding；surface stickiness；mechanical property\r


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