Journal
POLIMEROS-CIENCIA E TECNOLOGIA
Volume 24, Issue 2, Pages 143-148Publisher
ASSOC BRASIL POLIMEROS
DOI: 10.4322/polimeros.2014.044
Keywords
Microorganisms coagulation; natural rubber; rheological properties
Categories
Funding
- National Natural Science Foundation of China [50773013]
- National Key Technology Research and Development Program of China [2013BAF08B02]
- Key Science and Technology Program of Hainan Province of China [ZDXM20120090]
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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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