Rheological behavior of raw natural rubber coagulated by microorganisms
AUTOR(ES)
Wang, Zhifen, Luo, Wenjie, Fang, Lin, Liao, Shuangquan, Li, Lefan, Lin, Hua, Li, Sidong, He, Canzhong
FONTE
Polímeros
DATA DE PUBLICAÇÃO
2014
RESUMO
Tests of the strain sweep, frequency sweep and stress relaxation for raw natural rubber coagulated by microorganisms (NR-m) and raw natural rubber coagulated by acid (NR-a) were carried out with the use of a rubber process analyzer (RPA). The results showed that the storage torque, complex viscosity of NR-m were higher than those of NR-a while the loss factor was lower. The effect of temperature on viscosity of raw NR was studied following the Arrhenious-Frenkel-Eyring model. The viscous flow behavior of NR-m was poorer than those of NR-a. Furthermore, stress relaxation measurements of raw NR showed a longer period of relaxation for NR-m.
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