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Paper Information

Journal:   IRANIAN POLYMER JOURNAL (ENGLISH)   July-Agust 2003 , Volume 12 , Number 4; Page(s) 305 To 313.
 
Paper: 

MELT RHEOLOGY OF ETHYLENE PROPYLENE DIENE RUBBER MODIFIED WITH PHOSPHORYLATED CASHEW NUT SHELL LIQUID PREPOLYMER

 
 
Author(s):  MENON A.R.R.*
 
* Regional Research Laboratory (CSIR),Thiruvananthapuram – 695 019, Kerala, India
 
Abstract: 
The melt rheology of Ethylene Propylene Diene Rubber (EPDM) before and after modification with 5 and 10 phr each of phosphorylated cashew nut shell liquid prepolymer (PCNSL) and spindle oil was studied using a capillary rheometer over a wide range of temperature and shear rates. The plasticizing effect of PCNSL in EPDM was evident from the progressive decrease in melt viscosity, consistency index, shear modulus and activation energy of melt flow with increase in dosage of PCNSL. The higher value of pseudoplasticity index and lower value of die swell ratio of PCNSL modified EPDM at lower temperatures and shear rates reflect probable improvement in processability during operations such as mixing and extrusion. The lower values of principal normal stress difference of PCNSL modified EPDM as against that of the unmodified EPDM indicate good compatibility between EPDM and PCNSL
 
Keyword(s): MELT RHEOLOGY, ETHYLENE PROPYLENE DIENE RUBBER, PHOSPHORYLATED CASHEW NUT SHELL LIQUID PREPOLYMER, PROCESSABILITY, COMPATIBILITY
 
References: 
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