A new corona protection varnish was prepared by using epoxy/montmorillonite nanocomposite and pure epoxy resin as adhesives respectively.The adhesive with different amounts of organic montmorillonite（OMMT） was mixed...A new corona protection varnish was prepared by using epoxy/montmorillonite nanocomposite and pure epoxy resin as adhesives respectively.The adhesive with different amounts of organic montmorillonite（OMMT） was mixed with 1200 mesh silicon carbide（Si C） by different weight ratios.The surface states of the varnishes with various adhesives were observed by powerful optical microscope.Some properties of the varnishes were analyzed during the enduring time under 5kV/cm DC,such as the relation of change in nonlinear coefficient,natural surface resistivity,and surface temperature variation.The results showed that the amounts of OMMT had little effect on the natural surface resistance of the varnish but had important influence on the nonlinear property of the varnish.When the range of the OMMT content was 2wt% to 6wt%,the nonlinear coefficient of all materials with epoxy/OMMT nano-composite adhesive was higher than that with pure epoxy resin adhesive.The surface temperature of the varnish with epoxy/OMMT nanocomposite adhesive was all lower than that with the pure epoxy resin adhesive under high electrical field strength.展开更多
采用自由基聚合法合成了含环氧基丙烯酸树脂,并将该树脂与环氧树脂、聚酯树脂、填料、助剂等共混制备了低光泽粉末涂料。通过红外、分子量、扫描电镜、光泽度、铅笔硬度等测试,研究了引发剂用量对合成丙烯酸树脂性能的影响以及丙烯酸树...采用自由基聚合法合成了含环氧基丙烯酸树脂,并将该树脂与环氧树脂、聚酯树脂、填料、助剂等共混制备了低光泽粉末涂料。通过红外、分子量、扫描电镜、光泽度、铅笔硬度等测试,研究了引发剂用量对合成丙烯酸树脂性能的影响以及丙烯酸树脂中苯乙烯含量、不同树脂配比、固化剂的种类等对粉末涂料性能的影响。结果表明,在共混材料丙烯酸树脂的样品中,随着苯乙烯单体含量的增加,涂层的光泽度逐渐降低,由三种树脂共混制备的粉末涂料其涂层光泽度最低值可达6.6,铅笔硬度都在6 H 以上,附着力为0级,其综合性能得到了很大改善。展开更多
基金Funded by the Major State Basic Research Development Program of China(No.2010CB736208)the Planning Project of Hei Longjiang Province for Science and Technology(No.GC10A203)
文摘A new corona protection varnish was prepared by using epoxy/montmorillonite nanocomposite and pure epoxy resin as adhesives respectively.The adhesive with different amounts of organic montmorillonite（OMMT） was mixed with 1200 mesh silicon carbide（Si C） by different weight ratios.The surface states of the varnishes with various adhesives were observed by powerful optical microscope.Some properties of the varnishes were analyzed during the enduring time under 5kV/cm DC,such as the relation of change in nonlinear coefficient,natural surface resistivity,and surface temperature variation.The results showed that the amounts of OMMT had little effect on the natural surface resistance of the varnish but had important influence on the nonlinear property of the varnish.When the range of the OMMT content was 2wt% to 6wt%,the nonlinear coefficient of all materials with epoxy/OMMT nano-composite adhesive was higher than that with pure epoxy resin adhesive.The surface temperature of the varnish with epoxy/OMMT nanocomposite adhesive was all lower than that with the pure epoxy resin adhesive under high electrical field strength.
文摘采用自由基聚合法合成了含环氧基丙烯酸树脂,并将该树脂与环氧树脂、聚酯树脂、填料、助剂等共混制备了低光泽粉末涂料。通过红外、分子量、扫描电镜、光泽度、铅笔硬度等测试,研究了引发剂用量对合成丙烯酸树脂性能的影响以及丙烯酸树脂中苯乙烯含量、不同树脂配比、固化剂的种类等对粉末涂料性能的影响。结果表明,在共混材料丙烯酸树脂的样品中,随着苯乙烯单体含量的增加,涂层的光泽度逐渐降低,由三种树脂共混制备的粉末涂料其涂层光泽度最低值可达6.6,铅笔硬度都在6 H 以上,附着力为0级,其综合性能得到了很大改善。
