Study on Molecular Weight of Natural Rubber with Different Initial Moisture Contents Dried by Microwave

In this article, the molecular weight of wet Natural Rubber (NR) with different initial moisture contents, 3.80%, 10.05%, 19.76%, respectively, dried by microwave at frequency of 2450MHz was investigated using GPC. It can be seen from the results that an obvious trend of Mn and Mw changes was presented. With the increment of initial moisture contents, Mn and Mw decreased gradually. The molecular weight distribution (d) increased with the initial moisture contents increment, but quite closer to each other.