Improving the rheological and mechanical properties of polypropylenegraft-maleic anhydride (PP-MA) by chain extending

The present work provides improved low melt flow rate (MFR) PP-MA by chain extension, ADR۴۳۶۸ was used as the epoxy chain extender. The results showed that the torque of reactive mixingenhanced with increasing ADR content, this means the reaction of epoxy with maleic anhydridegroups. Then the rheological study was performed, by adding chain extender, the deviation ofterminal behavior and increasing the loss and storage modulus was observed . In addition, themechanical properties indicated that the presence of ADR leads to the no change in young’s modulus,increase in tensile stress and the elongation at break, so that the elongation in sample with[epoxy]/[MA]=۲ had increased ten times compared to PP-MA without ADR.

کلیدواژه ها:

chain extension ، PP-graft-maleic anhydride ، Epoxy chain extender