Premium
Light‐scattering measurements on polyisoprene solutions. II. Rubber from fresh natural latex
Author(s) -
Allen P. W.,
Bristow G. M.
Publication year - 1961
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1961.070051703
Subject(s) - natural rubber , materials science , composite material , mastication , scanning electron microscope , scattering , light scattering , dynamic light scattering , electron microscope , polymer chemistry , optics , physics , biology , nanotechnology , nanoparticle , paleontology
The value of M̄ w for a sample of natural rubber from fresh latex of one clonal type is ∼2 × 10 6 . As the latex ages, M̄ w diminishes and the gel content increases. Solutions of samples which have been masticated in oxygen contain very small particles of rubber, the existence of which is demonstrated by both light‐scattering and electron‐microscope measurements. The particles are heterodisperse and have a mean diameter of about 1000 A. As a result of their small size they are swollen very little in good solvents. They originate from the gel phase and either they are a product of mastication or, more probably, they are latex particles which have survived mastication.