Abstract
The cross-link density of DCP-cured natural rubber uniaxially deformed to various extension ratios at room temperature was measured. The cross-link density decreased characteristically with increasing extension ratio. A new model for the structure of the network is proposed in order to explain this decrease in cross-link density. The model can give a new interpretation of the stress-strain behavior of rubber vulcanizates. The birefringence of stretched rubber vulcanizates was determined using a polarizing microscope. The observed birefringence, Δt, can generally be factored into two parts: One is the birefringence of the amorphous phase, Δta; the other is the birefringence due to the strain-induced crystalline phase, Δtc; In the present paper, it has become feasible to separate Δt into Δta and Δtc.
Original language | English |
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Pages (from-to) | 535-547 |
Number of pages | 13 |
Journal | Journal of Macromolecular Science, Part B |
Volume | 23 |
Issue number | 4-6 |
DOIs | |
Publication status | Published - 1984 Aug 1 |
ASJC Scopus subject areas
- Chemistry(all)
- Condensed Matter Physics
- Polymers and Plastics
- Materials Chemistry