Ultrastructure of rubber particles in PA 80 latex. II. Effects of storage
1989
Samsidar H. | Gomez, J. B. | Rama Rao, P. S.
As a result of the sensitivity of PA 80 latex to 5% KMnO4 fixation in differentiating vulcanised and unvulcanised particles or zones of these particles, this method was again used to find the effects of storage. Latices examined were from various stages of vulcanisation which have been stored for one and six months. Vulcanisation as judged from the increase in intensity of staining of the particle interior was found to be progressive during storage even when the stage of vulcanisation was preliminary i.e. when the dispersion mixture was just added. The shell thickness of the rubber particles too is increased. Evidence from elsewhere has shown that there is an increase in free and total sulphur and gel content on storage. The electron microscopic results are consistent with these findings.
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