凝胶渗透色谱-激光光散射法测定甲基-乙烯基-苯基硅橡胶相对分子质量及其分布 |
Determination of Molecular Weight and Its Distribution of MPVQ by Gel Permeation Chromatography-Laser Light Scattering Method |
投稿时间:2018-03-24 修订日期:2018-03-24 |
DOI:10.12136/j.issn.1000-890X.2019.03.0230 |
中文关键词: 甲基-乙烯基-苯基硅橡胶 凝胶渗透色谱-激光光散射联用 相对分子质量 相对分子质量分布 |
英文关键词: polymethulphenyl-vinyl silicone rubber gel permeation chromatography-laster light scattering molecular weight molecular weight distribution |
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中文摘要: |
采用凝胶渗透色谱(GPC)-激光光散射(LLS)联用测定甲基-乙烯基-苯基硅橡胶(MPVQ)相对分子质量及其分布。确定测定条件如下:溶剂 甲苯,测试温度 25 ℃,流速 1 mL·min-1,试样溶液质量浓度 4 mg·mL-1,进样量 50 μL,测定MPVQ的折光指数增量(dn/dc为(0.058 9±0.002 5) mL·g-1;MPVQ数均相对分子质量和重均相对分子质量测定的相对标准偏差分别为3.97%和1.52%,GPC-LLS法具有较高的准确度和精密度。 |
英文摘要: |
The molecular weight and its distribution of polymethylphenyl-vinyl silicone rubber(MPVQ)were determined by gel permeation chromatography(GPC)-laser light scattering(LLS) method. The testing conditions were as follows:solvent toluene,test temperature 25 ℃,flow speed 1 mL·min-1,sample solution mass concentration 4 mg·mL-1,injection volume 50 μL,and the dn/dc value of MPVQ was (0.058 9±0.002 5) mL·g-1.The relative standard deviations of the number average molecular weight and weight average molecular weight were 3.97% and 1.52%,respectively. This study showed that GPC-LLS method had high accuracy and precision. |
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