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Use of Rubber Process Analyzer for Characterizing the Molecular Weight Parameters of Natural Rubber

文献类型： 外文期刊

作者： Gao, Tianming 1 ; Xie, Ruihong 1 ; Zhang, Linghong 2 ; Gui, Hongxing 1 ; Huang, Maofang 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Agr Prod Proc Res Inst, Minist Agr, Key Lab Trop Crop Prod Proc, Zhanjiang 524001, Peoples R China

2.Chinese Acad Trop Agr Sci, Rubber Res Inst, Danzhou 571737, Peoples R China

期刊名称：INTERNATIONAL JOURNAL OF POLYMER SCIENCE （ 影响因子：2.642； 五年影响因子：3.004 ）

ISSN： 1687-9422

年卷期： 2015 年

页码：

收录情况： SCI

摘要： The aim of this work is to introduce a simple and rapid method for characterizing the molecular weight parameters and other molecular structure parameters of natural rubber (NR) using a rubber process analyzer (RPA). In this work, NR of different molecular weights was prepared by milling. Molecular weight parameters were measured by gel permeation chromatography coupled with laser light scattering (GPC-LLS) for comparison with RPA results. It was verified that increasing of milling time leads to a decrease of the number-average molecular weight ((M) over barn), weight-average molecular weight ((M) over bar (w)), and molecular weight distribution (MWD). The dynamic and rheological properties were evaluated on RPA by tests of strain sweep, frequency sweep, and stress relaxation. These results were used to characterize the average molecular weight, MWD, and viscosity of NR and were found to agree with those from GPC-LLS. This convenient and rapid technology for characterizing NR molecular weight parameters would be especially useful in the elastomer industry.

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