排序方式: 共有5条查询结果,搜索用时 15 毫秒
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对顺丁橡胶浓溶液作了较为深入的研究,主要讨论了分子量分布和支化因子与顺丁橡胶浓溶液流动行为的关系。用倒沉淀分级的方法进行了大量分级,得到分子量分布较窄的试样;对这些试样用GPC-自动粘度计联用的方法测定了分子量、分子量分布和支化因子,同时用同轴圆筒式粘度计及落球方法测定了这些试样的浓溶液粘度。 相似文献
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偶联剂对玻璃纤维/环氧树脂基复合材料介电性能的影响 总被引:2,自引:0,他引:2
偶联剂对玻璃纤维/环氧树脂基复合材料介电性能的影响陈平刘胜平张明艳(哈尔滨理工大学电工材料系哈尔滨150040)关键词环氧树脂基复合材料,介电性能,偶联剂,浸润性玻璃纤维/环氧树脂基复合材料(GFRP)具有优异的电气和力学性能.然而孔隙的存在强烈地... 相似文献
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乙酰丙酮金属络合物对酸酐固化环氧树脂体系潜伏性促进作用的研究 总被引:4,自引:0,他引:4
A transition metal acetylacetone was studied as latent accelerator in the curing of anhydride cured epoxy resin by DSC, TEA, and rotation viscometer technique. The results reveal that the metal acetylacetone serves as an latent accelerator for anhydride curable epoxy resin system, and the rate of curing is found to increase with enhanced concentrations of the metal chelate. The system provides very fast gel time at 160-180℃ and combined with very good storage stability (> two months). Curing kinetic studies reveal that the overall suring process follows first order kinetics. The electrical,mechanical and thermal properties of cured com-pound of epoxy resin system catalyzed by the MT(acac)n and BDMA accelerator and cured by anhydride was also studied and compared in this paper. 相似文献
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本工作用GPC-Automatic Viscometer方法测定了顺丁胶样的分子量、分子量分布和支化因子,用同轴圆筒粘度计及落球法测定了顺丁胶浓溶液的粘度,主要研究了分子量分布和长链支化对顺丁胶浓溶液非牛顿流动的影响。提出了描述不同分子量分布的顺丁胶浓溶液粘度的切变速率依赖性的简单公式,并讨论了长链支化对顺丁胶浓溶液非牛顿流动的影响。 相似文献
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