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United States Department of Agriculture

Agricultural Research Service

Research Project: Guayule Rubber Crystallization Studies

Location: Crop Improvement & Utilization Research

2013 Annual Report


1a.Objectives (from AD-416):
To evaluate the extent of strain-induced crystallization present in guayule rubber (compared to Hevea-based NR and synthetics).


1b.Approach (from AD-416):
The approach will be to: 1) Prepare films of guayule natural rubber in the unvulcanized and vulcanized states, varying by composition of non-rubber constituents. 2) Measure physical and chemical properties related to composition and end-use performance. 3) Perform detailed studies of the rate and extent of strain-induced crystallization by synchrotron small-angle X-ray scattering (SAXS) and wide-angle X-ray diffraction (WAXD). This part of the project will leverage SUNY’s expertise and access to the Synchrotron Light Source at Brookhaven National Laboratory.


3.Progress Report:

Polymer-protein interactions are being studied so as to make guayule strain crystallize like conventional natural rubber(NR) from Hevea. The mechanical properties and extent of strain-induced crystallization (SIC) have been measured on four series of experimental blends. Generally, guayule natural rubber has lower SIC than Hevea rubber. This research supports Objective 2 of the parent project: Develop technologies to enable the domestic production of natural rubber and ricinoleate with properties as good as or better than existing sources for industrial applications.


Last Modified: 7/25/2014
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