Paper Information

Journal:   IRANIAN POLYMER JOURNAL (ENGLISH)   2004 , Volume 13 , Number 6; Page(s) 455 To 461.
 
Paper: 

STUDIES ON RHEOLOGICAL BEHAVIOUR OF THERMOPLASTIC ELSTOMER DERIVED FROM PVC AND NBR USING TORQUE RHEOMETRY

 
 
Author(s):  MOUSA A.*
 
* Department of Materials and Metallurgical Engineering, Al-Balqa Applied University, Salt-19117, Jordan
 
Abstract: 

Plasticized poly(vinyl chloride)/Nitrile butadiene rubber thermoplastic elastomers (PVC/NBR TPEs) were melt mixed using a Brabender Plasticorder. The rheological behaviour of PVC/NBR TPEs was evaluated using a Brabender Torque Rheometer. The plastogram of the PVC/NBR blend revealed that the mixing process was completed after 4 min, the blend was left to homogenize for further 4 min. The effect of rubber (NBR in this case) content on the rheological behaviour was evaluated, using the power law index (shear dependence of viscosity) and activation energy for viscous flow (temperature dependence of viscosity). The overall viscosity was found to decrease with the increase in NBR concentration. This might be related to plasticization role of NBR on PVC due to the dilution of the PVC viscosity phase. Furthermore, it has been found that the increase in rubber loading decreases the activation energy of the PVC/NBR formulation.

 
Keyword(s): RHEOLOGY, MELT FLOW INDEX, PLASTICIZER, NBR; PVC
 
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