【作者】 陈桥；

【导师】 余鼎声；

【作者基本信息】 北京化工大学 ， 材料学， 2006， 博士

【摘要】 聚苯并噁嗪作为一类新型热固型树脂，具有很多优异性能，其是在传统酚醛树脂的基础上发展起来的。随着社会的发展，对材料性能的要求也不断提高，苯并噁嗪树脂作为高性能材料，其综合性能有待进一步提高。目前，对于树脂进行纳米改性是提高其性能的最为有效的手段之一，所以本文分别选用有机蒙脱土(OMMT)，多壁碳纳米管(MWNTs)和多面体低聚硅倍半氧烷(POSS)作为增强相，对苯并噁嗪树脂进行纳米改性研究。 本文首先利用原位法，首次研究了OMMT的引入对一种含有反应性烯丙基基团的新型苯并噁嗪——双(3-烯丙基-3，4-二氢-2H—1，3-苯并噁嗪基)异丙烷(ABZ)的合成，固化行为及最终固化产物(PABZ)性能的影响，制备出了PABZ／OMMT纳米复合材料。OMMT的引入对于ABZ单体的合成、固化温度没有明显的影响；但对体系中烯丙基交联有阻碍作用，使固化反应放热下降。与纯基体树脂相比，PABZ／OMMT纳米复合材料的储能模量，玻璃化转变温度和耐热性都有所提高。纳米复合材料的性能与蒙脱土的含量有密切关系，最佳蒙脱土含量为0.5～2％。 本文首次利用多壁碳纳米管(MWNTs)对于苯并噁嗪树脂进行改性。选择基于双(3-苯基-3，4-二氢化-2H-1，3-苯并噁嗪基)取代异丙烷这种单体(BZ)的聚合物为基体树脂(PBZ)。为了增强碳纳米管与基体树脂之间作用，首先对MWNTs进行了表面氧化处理，使其表面带有含氧基团(如羟基，羧基等)，进一步改性，使得异氰酸酯基团引更多还原

【Abstract】 Polybenzoxazine is a new kind of thermosetting resin, and has some excellent characteristics, which is developed from traditional phenolic resin. However, with the developing of the society and the increasing of the requirement of the properties of the materials, polybenzoxazine, as a high performance material, the comprehensive properties of it should be improved further. Therefore, in this dissertation, the organically modified montmorillonite (OMMT), multiwalled carbon nanotubes (MWNTs) and polyhedral oligomeric silsesquioxanes (POSS) were used as the reinforcement phases to modify the polybenzoxazine, respectively.Firstly, by using in suit method, the effect of OMMT on the synthesis and the curing behavior of the benzoxazine monomer containing allyl group—bis (3-allyl-3,4-dihydro-2H-1,3- benzoxaziny) isopropane (ABZ), and the properties of final polymer (PABZ) were studied , the novel PABZ/OMMT nanocomposite was prepared. In the presence of OMMT, there were little effect on the synthesis of monomer ABZ and the curing temperature of ABZ, but introduction of clay delayed the cross link of allyl in ABZ and the exotherm amount of the system decreased. With the introduction of OMMT, the storage modulus of the nanocomposite increased and the更多还原