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分别采用介孔分子筛SBA-15原位聚合及SBA-15负载催化剂原位聚合的方法,制备聚双环戊二烯(PDCPD)/SBA-15复合材料.比较不同制备方法对PDCPD/SBA-15力学性能的影响,运用XRD、TEM、TG、SEM等研究了SBA-15的增强机理.研究结果表明,采用原位聚合的方法制备的复合材料,SBA-15孔道中的双环戊二烯(DCPD)单体难以发生聚合反应,生成PDCPD分子链,致使SBA-15与PDCPD界面作用力弱且发生团聚,导致复合材料的力学性能没有明显改善.采用SBA-15负载催化剂,原位聚合的方法制备的复合材料,PDCPD分子链可在SBA-15孔道大量生成,提高了PDCPD基体与SBA-15的界面作用力,阻止SBA-15团聚,使得复合材料的拉伸强度明显改善,在2%SBA-15添加量下,复合材料的拉伸强度较PDCPD提高24.5%,其热稳定性也有明显改善.
Polycyclic dicyclopentadiene (PDCPD) / SBA-15 composites were prepared by in-situ polymerization of mesoporous molecular sieves SBA-15 and in-situ polymerization of SBA-15 supported catalysts respectively.Comparison of different preparation methods for PDCPD / SBA-15 mechanics The mechanism of SBA-15 enhancement was studied by XRD, TEM, TG and SEM.The results showed that the dicyclopentadiene (DCPD) in the SBA-15 pores of the composites prepared by in situ polymerization, The monomer is difficult to occur polymerization, resulting PDCPD molecular chain, resulting in SBA-15 and PDCPD interface force is weak and agglomeration, resulting in the mechanical properties of the composite did not significantly improve the use of SBA-15 supported catalyst prepared by in situ polymerization The PDCPD molecular chain can be formed in a large amount in the SBA-15 channel, which enhances the interfacial interaction between the PDCPD matrix and SBA-15 and prevents the agglomeration of SBA-15. The tensile strength of the composites increases significantly. The tensile strength of the composites increased by 24.5% compared with that of PDCPD under the added amount, and the thermal stability of the composites also improved obviously.