| Determination of Molecular Weight and Its Distribution of MPVQ by Gel Permeation Chromatography-Laser Light Scattering Method |
| Received:March 24, 2018 Revised:March 24, 2018 |
| DOI：10.12136/j.issn.1000-890X.2019.03.0230 |
| Key Words: polymethulphenyl-vinyl silicone rubber；gel permeation chromatography-laster light scattering；molecular weight；molecular weight distribution |
| Author Name | Affiliation | E-mail | | TAN Limin* | The 42nd Institute of the Fourth Academy of CASC | 358957343@qq.com | | LI Shenghua | The 42nd Institute of the Fourth Academy of CASC | | | WANG Min | The 42nd Institute of the Fourth Academy of CASC | | | ZHANG Yuanyuan | The 42nd Institute of the Fourth Academy of CASC | |
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| Abstract: |
| 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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