窄分子量分布 narrow molecular weight distribution 天然顺式聚异戊二烯；天然橡胶 natural cis-polyisoprene 固有拉伸比；自然拉伸比 natural draw ratio .
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And by improving the craftwork of precipitation of PCS, the narrow molecular weight distribution of PCS was got.
并改进了逐步沉淀分级工艺，对PCS进行沉淀分级，得到了窄分布的分级样品。
The controlling methods of polymeric dispersant with low polymerization degree and narrow molecular weight distribution were introduced.
介绍了低聚合度、窄分子量分布的聚合物分散剂的控制方法。
The graft copolymer of cationic starch and APAM with narrow molecular weight distribution was prepared and used for dry-strengthening agent.
用阳离子淀粉接枝窄相对分子质量阴离子聚丙烯酰胺制备干增强剂。
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