凝胶色谱法测定氟醚橡胶相对分子质量及其分布
董雅卓,冀克俭,侯倩倩,许峰,张文申,宋磊,李胜凯
山东非金属材料研究所,济南 250031
Determination of the molecular weight and distribution of fluoroether rubber by gel permeation chromatography
董雅卓,冀克俭,侯倩倩,许峰,张文申,宋磊,李胜凯
Shandong Nonmetallic Materials Institute, Jinan 250031, China
摘要:采用凝胶色谱法测定氟醚橡胶的相对分子质量及其分布。分别对单检测器(示差检测器)及三检测器(示
差-光散射-黏度检测器)进行了方法研究。确立了以四氢呋喃为流动相,PLgel MIXED-B 两柱串联,柱温为40 ℃,流量为1 mL/min 的分析条件。利用本法测定聚苯乙烯标准物质的相对分子质量,测定值相对标准偏差均小于3%(n=6),数均相对分子质量相对误差小于10%,重均相对分子质量相对误差绝对值小于1%。
Abstract:The molecular weight and distribution of fluoroether rubber were measured by gel permeation
chromatography. Methods involved single-detector GPC(differential refractive index detector) and three-detector
GPC(refractive index-light scattering-viscosity detectors) were studied. The experimental conditions were that the tetrahydrofuran as flow phase, flow rate of 1 mL/min. Two Plgel Mixed-B columns in series were used with column temperature of 40 ℃. The relative deviation for molecular weight of polystyrene standard material determined by two methods were less than 3% (n=6), the relative error of number average relative molecular mass was less than 10%, and the absolute value of the relative error of weight-average relative molecular mass was less than 1%.
关键词:凝胶色谱;相对分子质量;氟醚橡胶;三检测器
Keywords:gel permeation chromatography; molecular weight; fluoroether rubber; three-detector
基金:国防科工局技术基础项目(JSJL2017208A013)
本文引用格式:
董雅卓,冀克俭,侯倩倩,等. 凝胶色谱法测定氟醚橡胶相对分子质量及其分布[J]. 化学分析计量,2021,30(3):27.
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