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在氢化丁苯共聚物13C-NMR谱脂肪碳部分谱带归属的基础上,根据各谱带的主要来源,推导出六个二单元浓度的计算公式。计算出二单元、一单元的相对含量,各结构单元的数均序列长度、嵌段含量和其它结构参数。加氢前后的1H-和13C-NMR谱的组成计算结果基本一致。初步探讨了作为粘度指数改进剂的氢化丁苯共聚物微观结构与性能的关系,为合成提供了依据。 相似文献
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he block copelymer of 6-- methyl-- morpholinedione and caprolactone have been synthesized based on the stepwise addition of 6 -- methyl -- morpholinedione to the hydroxyl end group of prepolymers using stannous octoate as a catalyst. Themolecular weight of pre-polymer of caprolactone was determined by the molar ratio of caprolactone and 1, 4-butanediol. The block structure was confirmed andcharacterized by means of 1H-- NMR, 13C-- NMR, IR, and GPC. The thermal analysis were also reported and compared with the random copolymers. 相似文献
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