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聚对苯二甲酸乙二醇酯(PET)具有较为优良的综合性能,但也存在一些不足之处,例如其耐光老化性、对水汽阻隔性、耐水解性、可热封性、耐热性及光学性能等还不是十分理想,故普通聚酯膜对于太阳能电池背板、平板显示屏用光学膜、高档电子电器绝缘膜及ITO导电膜等新的应用领域则达不到使用要求。本文简述了对聚酯的改性方法,包括化学改性和物理改性。 相似文献
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聚对苯二甲酸乙二醇酯(PET)具有较为优良的综合性能,但也存在一些不足之处,例如其耐光老化性、对水汽阻隔性、耐水解性、可热封性、耐热性及光学性能等还不是十分理想,故普通聚酯膜对于太阳能电池背板、平板显示屏用光学膜、高档电子电器绝缘膜及ITO导电膜等新的应用领域则达不到使用要求。本文简述了对聚酯的改性方法,包括化学改性和物理改性。 相似文献
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科学技术的发展对材料的高功能化、高强度化和复合化提出了更加苛刻的要求。因此,作为可以满足上述要求的有效手段的材科表面改性技术的改进和发展,颇受关注。产业受经济变化和发展的影响,以往的那种“重厚长大”型产业已不断失去国际竞争力,而且逐步向“轻薄短小”型产业转变和过渡。当然,这种转变不单单局限于产品形状的改 相似文献
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《网络聚合物材料通讯》2007,6(3):21-23
通过粘度、超声速率及折射率研究氯仿中的环氧/不饱和聚酯混合物的可混性;应用于防水材料的不饱和聚酯树脂的组成;反复使用的聚乙烯基对苯二酯中得到的乙烯基酯存在下的不饱和聚酯压缩特性及固化性能;环氧聚合物改性光敏性不饱和聚酯的制备;耐热双马来酰亚胺改性不饱和聚酯树脂;用于生产储存稳定的不饱和聚酯树脂的含引发剂的微胶囊. 相似文献
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离子注入技术改性聚合物薄膜在电子及电器工程中有着巨大的潜在应用价值。综述了近年来聚合物薄膜经离子注入后在导电性能,光学性能,导磁性能及表面力学机械性能等方面的最新进展。分析了注入离子与聚合物相互作用的物理过程,并指出了该领域存在的问题及发展方向。 相似文献
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随着高分子复合材料的广泛应用,界面性能成为影响其综合表现的重要因素。紫外-臭氧辐射法(UVO)是一种简单经济的表面改性工艺,可激发高分子表面分子链,从而赋予其不同于本体性能的表面特性(如表面润湿性、与其他材料的界面相容性等),也为进一步的界面偶联提供反应位点。本文首先概述了国内外学者在电子、生物医疗等领域中采用UVO工艺改性不同种类高分子材料(聚酯类高分子材料、聚烯烃高分子材料、有机硅高分子材料、合成橡胶、纺织材料)表面的研究现状及相应研究成果;在此基础上,梳理了改性高分子材料表面与不同种类硅烷偶联剂(甲基丙烯酰氧基、环氧基、氨基、巯基硅烷偶联剂)的反应条件及复合材料界面性能;最后,对UVO工艺未来可能的应用空间进行了展望。 相似文献
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不饱和聚酯复合材料的改性研究 总被引:2,自引:0,他引:2
综述了不饱和聚酯复合材料改性方面的最新发展.介绍了不饱和聚酯复合材料在表面、界面、低收缩改性以及天然纤维和无机物增强方面的研究,并着重介绍了不饱和聚酯/层状硅酸盐蚋米复合材料的制备和性能. 相似文献
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The toughening effect of reactive liquid rubber additions on two polyester resin systems has been investigated. Fracture toughness and crack propagation behaviour have been studied, using the double torsion test. Toughness, as defined by fracture surface energy for crack initiation, increased with rubber content. The magnitude of the increase was dependent upon rubber-resin compatibility. The most successful system, incorporating an experimental butadiene-acrylonitrile rubber, showed an eight-fold increase in toughness, compared with the unmodified resin. Other proprietary systems showed more modest increases. Modulus and heat distortion temperature were also investigated for the different rubber-resin systems. In all cases, some deterioration in these properties was seen. The experimental rubber caused a reduction in resin modulus comparable with that produced by proprietary rubbers; heat distortion temperature in the experimental system was relatively little affected. The experimental rubber also affected the stress-strain behaviour of the resin. Resin modified with the experimental rubber yielded and deformed plastically, in contrast with the unmodified material, which behaved in a brittle manner. 相似文献
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The microstructures of two polyester resin systems, with reactive liquid rubber additions incorporated, were investigated using electron microscopy. Fracture surface morphologies of failed fracture toughness specimens were examined using scanning electron microscopy. The fine structures of unfractured toughened resins were examined by imaging ultra thin sections in the transmission electron microscope. Three of the four rubber additives investigated produced, upon curing, a dispersion of second-phase rubber-rich particles in the polyester resin matrix. The fourth additive, which was more compatible with polyester than the other three, did not produce any detectable particle dispersion upon curing, even at relatively high concentrations. The fine structures of the particle distribution were found to be highly dependent upon both rubber and resin formulations. Rubber additions modified the mode of fracture observed in double torsion tests of polyester resins, from continuous crack propagation to slip-stick, and distinctive changes in fracture surface morphology were observed. In zones of crack arrest and slow stable crack growth, crack blunting occurred and highly deformed structures were seen on the fracture surface. In one system, this zone was split into two distinct regions, due to crack blunting and the initiation of new, sharp cracks. In zones of rapid crack growth, there was no evidence of crack blunting. The amount of crack blunting was highly dependent upon speed of testing. 相似文献
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我国海洋工程装备制造业正处在生存与发展的关键阶段,防腐涂层是降低基材腐蚀速率、提升其服役寿命最有效的方式之一。导电聚合物涂层由于其绿色环保、制备简单等优点及独特的导电与防腐机制,使其在金属腐蚀防护领域得到了广泛的应用。本文归纳总结了导电聚合物涂层的防腐机制,介绍了采用化学氧化和电化学合成两种方法制备导电聚合物涂层的现状,重点阐述了导电聚合物涂层的掺杂改性、共聚改性、分层设计3种改性技术对涂层耐蚀性能的提升效果,最后提出了导电聚合物涂层在腐蚀防护领域可能存在的研究热点和发展趋势。 相似文献
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