Technical Paper Archive


This site contains all papers presented at Rubber Division, ACS Technical Meetings from 2000-2018. Meetings prior to 2000 are incomplete and papers are added as they are digitized.


For older papers not listed here, please send your request, including Meeting Year, Title, Author, and Paper # to: cbrady@rubber.org


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Nanomatrix Structure of Natural Rubber

Kawahara  seiichi

Event: 185th Technical Meeting
Location: Louisville, KY
Date: March 24, 2014
Author: Seiichi Kawahara
Paper Number:

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  • Sparks-Thomas Award, Presentation Slides
    The morphology of natural rubber was observed by transmission electron microscopy and focused ion beam-scanning electron microscopy. Nanomatrix of non-rubber components such as proteins and phospholipids was found to be inherently formed in natural rubber, in which natural rubber particles of about 1 μm in average diameter were dispersed. The nanomatrix of non-rubber components disappeared after removing proteins from natural rubber, whereas it thickened after increasing the amount proteins. Viscoelastic properties of natural rubber were dependent upon the nanomatrix of non-rubber components: that is, the lager the amount of proteins (the thicker the thickness of nanomatrix), the higher the storage modulus. The outstanding mechanical properties of natural rubber were related to the formation of nanomatrix structure.

    Papers from 185th Technical Meeting

    Items from 185th Technical Meeting