聚丙烯/尼龙6复合超微粉改性天然橡胶热氧老化降解动力学<br>Study on Thermal Oxidative Degradation Kinetics of the Blend of PA6-PP Ultra Fine Co-Powder and Natural Rubber

2011 ◽  
Vol 01 (01) ◽  
pp. 12-16
Author(s):  
李 志敏
Keyword(s):  
Natural Rubber ◽  
Degradation Kinetics ◽  
Oxidative Degradation ◽  
Thermal Oxidative Degradation ◽  
Kinetics Of

Kinetic Study of Oxidative Scission in Natural Rubber by Wallace Plasticity Measurements

1992 ◽  
Vol 65 (1) ◽  
pp. 1-6 ◽  
Author(s):  
L. H. Gan ◽  
S. C. Ng ◽  
K. K. Chee
Keyword(s):  
Activation Energy ◽  
Kinetic Parameter ◽  
Natural Rubber ◽  
Kinetic Data ◽  
Oxidative Degradation ◽  
Chain Scission ◽  
Thermal Oxidative Degradation ◽  
Diffusion Controlled ◽  
Kinetics Of ◽  
Diffusion Controlled Reaction

Abstract The kinetics of thermal oxidative degradation of natural rubber (NR) have been studied by Wallace plasticity measurements. On the basis of the Kotliar's model of random chain scission, an expression was derived to interpret the kinetic data collected over a range of temperatures from 80 to 160°C. It has been shown that the kinetic parameter resulting from the present analysis, indeed refers to a diffusion-controlled reaction with an overall activation energy estimated to be 135 ± 6 kJ · mol−1. In addition, the implications of plasticity retention index, which measures the oxidizability of NR, are discussed.

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