Reversible addition fragmentation transfer (RAFT) polymerization has attracted much attention, because its reaction mechanism has been well studied and it provides a facile approach to prepare the special functional polymer. Herein, mesoporous SBA-15 with pore size of 6 nm was employed as a “microreactor” for the RAFT solution polymerization of methyl methacrylate (MMA), glycidyl methacrylate (GMA) or styrene (St) using a xanthate as a chain transfer agent and AIBN as the initiator. The structures, morphologies and properties of the obtained polymers and in-situ composites were fully characterized. XPS results confirm the presence of sulfur in the obtained polymers, which indicates a RAFT polymerization mechanism. XRD observation found that the in-situ composites exhibited the similar two-dimensional hexagonal pore structures intrinsic to SBA-15. However, the specific surface area, pore size, and pore volumes of the composites decreased dramatically compared with the intrinsic SBA-15 morphology. N₂ adsorption studies of polymers synthesized from various monomer mixtures revealed differing properties with adsorption capacity in the order of GMA > MMA > St. The M_n and M_w of polymers produced from within SBA-15 were significantly higher than those produced external to the SBA-15 framework. Meanwhile, the molecular weight distributions of polymers constructed within the SBA-15 were narrower. Lastly, the thermal stability and glass transition temperature of the polymers constructed within the SBA-15 were notably enhanced.

可逆加成断裂转移（RAFT）聚合已经引起了广泛的关注，因为它的反应机理已经得到了很好的研究，并且为制备特殊功能聚合物提供了一种简便的方法。在此，使用孔径为6 nm的中孔SBA-15作为“微反应器”，使用黄原酸酯作为链转移剂进行甲基丙烯酸甲酯（MMA），甲基丙烯酸缩水甘油酯（GMA）或苯乙烯（St）的RAFT溶液聚合。 AIBN作为发起者。充分表征了所得聚合物和原位复合材料的结构，形态和性能。XPS结果证实了所得聚合物中硫的存在，这表明了RAFT聚合机理。XRD观察发现，原位复合材料表现出SBA-15固有的相似二维六角孔结构。但是，与固有的SBA-15形态相比，复合材料的比表面积，孔径和孔体积显着下降。ñ_2种由各种单体混合物合成的聚合物的吸附研究表明，其吸附容量具有不同的性质，即GMA> MMA>St。从SBA-15内生产的聚合物的M _n和M _w显着高于在SBA外部生产的聚合物的M _n和M _w。 -15框架。同时，在SBA-15内构建的聚合物的分子量分布较窄。最后，在SBA-15中构建的聚合物的热稳定性和玻璃化转变温度得到了显着提高。