Premium
The distribution coefficient of oil and curing agent in PP/EPDM TPV
Author(s) -
Lei Caihong,
Huang Xianbo,
Ma Fangzhong
Publication year - 2007
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.955
Subject(s) - materials science , differential scanning calorimetry , curing (chemistry) , peroxide , composite material , thermoplastic , melting point , plastics extrusion , temperature coefficient , raw material , chemical engineering , polymer chemistry , organic chemistry , thermodynamics , chemistry , physics , engineering
Abstract The distribution coefficients of oil and curing agent in PP/EPDM TPV were calculated by measuring the melting point of the PP phase using differential scanning calorimetry (DSC). The PP/EPDM TPV was prepared by using a twin screw extruder and a peroxide curing agent was used. The peroxide induces the degradation of PP, resulting in the decrease of T m . The oil in PP phase also decreases the Tm. Based on the T m difference among pure PP and PP/EPDM TPV before and after extraction by cylcohexane, the calculated oil distribution coefficient is 0.537. The addition sequence of PP, oil, and curing agent has a significant effect on the T m and the calculated curing agent distribution coefficient is 0.52. Both of the coefficients are less than 1. Based on the calculation of the two coefficients, a rationale design of thermoplastic vulcanizate (TPV) can be made by proper control of raw materials, addition sequence, and processing parameters. Copyright © 2007 John Wiley & Sons, Ltd.