天然橡胶的粘度、松弛和稳定性

The Open Macromolecules Journal Pub Date : 2009-10-23 DOI:10.2174/1874343900903010041

J. Maláč

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引用次数: 10

摘要

研究了未老化和烘箱老化SMR - L天然橡胶试样的穆尼粘度和穆尼弛豫。粘度表征为ML(1+4) 100°C，应力松弛率表征为幂律M = k (t) a的指数a。随着140℃高温时效时间的延长，黏度和应力松弛率均呈下降趋势。因此，可以通过穆尼粘度和穆尼松弛试验来研究天然生胶的老化，所得结果足够灵敏，可用于表征天然生胶的稳定性。

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Viscosity, Relaxation and Stability of Natural Rubber

Mooney viscosity and Mooney relaxation of unaged and oven aged SMR L natural rubber samples were stud- ied. The viscosity was characterized by ML (1+4) 100°C and the rate of stress relaxation by the exponent a in a power law M = k (t) a . With the increasing time of oven aging at 140°C the decrease of both viscosity and stress relaxation rate expo- nent were observed. Aging of raw natural rubber can therefore be studied by Mooney viscosity and Mooney relaxation tests and obtained results are sensitive enough to be used for characterization of raw natural rubber stability.

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The Open Macromolecules Journal

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