定义 中文名称： 沉淀分级 英文名称： precipitation fractionation 定义： 基于高分子在溶剂中溶解度的差别使高分子溶质按溶解度自小至大分离出若干级份的过程。 应用学科： 材料科学技术（一级学科）； 高分子材料（二级学科）
基于154个网页-相关网页
Lignin through dissolution - precipitation fractionation was divided into three 3 points, P1(pH=6)、P2(pH=5)、P3(pH=2),GPC analysis showed that Mw and Mw/Mn lower than raw material.
木质素通过溶解—沉淀分级,得到三个级分,P1(pH=6)、P2(pH=5)、P3(pH=2),产物经GPC测定显示,平均分子量与分散度都比原料有所降低。
参考来源 - 木质素季铵盐为模板制备SiO·2,447,543篇论文数据，部分数据来源于NoteExpress
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。
And by improving the craftwork of precipitation of PCS, the narrow molecular weight distribution of PCS was got.
本工作用甲苯作溶剂，乙醇作沉淀剂，用沉淀分级法，对溶聚丁苯橡胶（S-SBR）进行了分级。
Solution polymerized styrene-butadiene rubber ( S-SBR ) was fractionated by repeated precipitation method, using redistilled toluene as solvent and ethyl alcohol as precipitant.
采用高浓度醇溶液处理羊栖菜粉、稀酸提取、减压浓缩、乙醇分级沉淀和冷冻干燥等单元操作，可以获得褐藻糖胶产品。
The fucoidan product was obtained by pretreatment of algae powder with high concentration ethanol, diluted acid extraction, concentration under vacuum, ethanol precipitation and lyophilization.
应用推荐