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含三苯基膦结构聚芳酰胺的合成与性能研究
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摘要
聚芳酰胺是一类重要的高性能高分子材料,因其突出的耐热性和力学性能,被广泛应用于航空航天、电子电气、膜材料和交通运输等领域。成为高分子材料领域研究的热点之一。
     本文首先合成了含磷单体双(对羧苯基)苯基氧化膦(BCPPO),并通过红外光谱、核磁共振和DSC等对其结构进行了表征。
     将主链含磷单体BCPPO分别与4,4’-二氨基二苯基甲烷(DDM)、对苯二胺(PPDA)、4,4’-二氨基二苯砜(DDS)和4,4’-二氨基二苯醚(ODA)通过Yamazaki膦酰化法进行聚合反应;研究了合成反应条件,如反应温度、反应时间和反应浓度等因素对聚芳酰胺特性粘度的影响;用红外光谱、核磁共振和元素分析等对聚合物进行了结构表征;使用DSC测定了聚合物的玻璃化转变温度,使用TGA对聚合物进行了热失重分析,并测定了含磷聚芳酰胺在有机溶剂中的溶解性,结果表明,在主链上引入磷元素可以提高聚芳酰胺的玻璃化转变温度,具有较高的热稳定性并改善了它的溶解性;另外还对合成的聚芳酰胺进行了成膜性实验,发现其具有良好的成膜性。对聚合物薄膜进行了力学性能测试,结果表明,聚合物薄膜具有较好的力学性能。对聚合物薄膜进行了接触角测量,结果表明,共聚可使聚合物的亲水性减弱,从而抵御潮湿的能力增强,在实际应用中有利于保持聚合物的力学性能和稳定性。
     本文还合成了主链含磷二胺单体双(3-氨基苯基)苯基氧化膦(BAPPO),并对它的合成和纯化路线进行了研究,并研究了合成条件,如反应温度,反应时间等因素对产率的影响。采用红外光谱和DSC对合成产物的结构进行了表征。
Aromatic polyamides are one of the most important high-performance polymers. Due to their excellent thermal stability and outstanding mechanical properties, aromatic polyamides are widely used in the aerospace, transportation, electrical and electronic industries and so on. Research in the field of polymeric materials has become one of the hot spots.
     Phosphorus containing monomer, bis(4-carboxyphenyl) phenyl phosphine oxide (BCPPO), was synthesized and then characterized by FT-IR, NMR and DSC.
     Four novel aromatic polyamides were synthesized by BCPPO separately with 4,4'-diaminodiphenyl methane(DDM), p-phenylenediamine(PPDA),4,4'-Diaminodiphenyl sulfone(DDS) and 4,4'-Diaminodiphenyl ether(ODA) by Yamazaki phosphorylation reaction. The influences of reaction conditions such as reaction temperature, reaction time, and concentration of reactants on polymerization were studied. The structure of the polymers were characterized by FT-IR,1-NMR,31P-NMR and elemental analysis, and the properties were characterized by DSC, TGA and solubility test. Which indicates that in the main chain on the introduction of phosphorus can improve aromatic polyamides glass transition temperature, has high thermal stability and improve its solubility. The aromatic polyamides posses well film ability and the properties of the thin film of polymers were tested, which indicates they possesses excellent mechanics property, contact angle test indicates that copolymerization polymer can weaken the hydrophilic and enhance the ability to resist moisture, which has conducive to maintaining the mechanical properties and the stability of polymers in practical applications.
     The novel phosphorus-containing diamide monomer, Bis(3-aminophenyl) pheny phosphine oxide(BAPPO), was synthesized. The synthesis and purification of route and the influences of reaction conditions such as reaction temperature and reaction time on yield were studied and characterized by FT-IR and DSC.
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