【作者】 刘阳；

【导师】 陈春海；

【作者基本信息】 吉林大学 ， 化学工程（专业学位）， 2019， 硕士

【摘要】 本文采用亲核取代法,以1,3-双(4-氟苯甲酰基)苯与联苯二酚在碱性金属盐碳酸钠催化的条件下,以二苯砜作溶剂对其进行逐步缩合,经该反应后再缩聚得到了一系列具有不同分子量的间位联苯型聚芳醚酮(命名:PEDEKm K)粉末样品,并制备了无定型和结晶两种类型的薄膜样品,并以同样方法制备的聚醚醚酮(PEEK)薄膜样品为参照,通过热失重分析(TGA)、动态热机械分析(DMA)、热机械分析(TMA)、毛细管流变、熔体质量流动速率、平板流变、差示扫描量热分析(DSC)以及力学性能等分析手段,对所有合成的聚合物样品进行了热性能及力学性能的研究。研究结果表明这种加工树脂不仅具有与聚醚醚酮(PEEK)一样耐热性、良好的热稳定性和优异的机械性能,并且这种加工树脂在大大提高了材料玻璃化转变温度(Tg)的同时,熔点(Tm)还远远低于聚醚醚酮(PEEK),因此该树脂具有比聚醚醚酮(PEEK)更高的使用温度和更好的加工性能。在对树脂进行全面的评价之后,选取出其中一种流动性能优异的PEDEKm K树脂样品,然后将其与碳纤维复合制备了预浸料及其复合材料层压板,利用万能试验机及超声扫描显微镜对复合材料层压板的力学性能及界面结合情况进行了初步研究,充分的验证了PEDEKm K材料可以作为碳纤维复合材料的树脂基体并同时也验证了制备工艺的可行性。更多还原

【Abstract】 In this paper,nucleophilic substitution method is used,a series of meta-biphenyl polyaryletherketone(PEDEKm K)powder with different molecular weights were obtained by the polycondensation of 1,3-bis(4-fluorobenzoyl)benzene and biphenyldiol with sodium carbonate as catalyst and diphenyl sulfone as the solvent.Meanwhile,both amorphous and crystalline film samples were also achieved,and polyetheretherketone(PEEK)film sample as a reference were prepared in the same way.The thermal and mechanical properties of all synthesized polymer samples were studied via thermogravimetric analysis(TGA),dynamic thermomechanical analysis(DMA),thermomechanical analysis(TMA),capillary rheology,melt mass flow rate,plate rheology,differential scanning calorimetry(DSC).The results showed that the processed resin not only hadthe similarheat resistance,good thermal stability and excellent mechanical properties as polyetheretherketone(PEEK),but also possessedhigher glass transition temperature(Tg).At the same time,the melting point(Tm)is much lower than polyetheretherketone(PEEK),so the resin hada higher operating temperature and better processing properties than polyetheretherketone(PEEK).After comprehensive evaluation of the resin,one of the PEDEKm K resin samples with excellent flow properties was selected,and then the prepreg and its composite laminate were prepared by combining the selected resin with carbon fiber,and the composite material was scanned by universal testing machine and ultrasonic scanning microscope.The mechanical properties and interface bonding of the laminates were preliminarily studied.It was fully verified that the PEDEKm K material can be used as the resin matrix of the carbon fiber composite material and also verified the feasibility of the preparation process.更多还原