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Effect of EPDM on Cellular Morphology of PP Structural Foam

Xiang‐Bin Xu

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Abstract

With capillary rheometer,dynamic rheometer,differential scanning calorimeter(DSC)and metalloscope,the effect of ethylene propylene diene monomer(EPDM) on melt property of EPDM/PP blends,relative crystallinity of polypropylene(PP)and cell morphology were studied.The results showed that melt strength and relative crystallinity of PP/EPDM blend employed with low content EPDM(≤10 wt%) were lower than the pure PP,meanwhile,the viscosity of the blend melt was rarely influenced by EPDM.When content of EPDM was 9.5(wt)%,an cellular foam PP with cell density of 2.3×105cells/cm3 and cell size of about 90μm was prepared,owing to the promotion of cell nucleation on the interface of PP/EPDM and decreasing of crystallinity of PP/EPDM blend.

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What this paper is about

With capillary rheometer,dynamic rheometer,differential scanning calorimeter(DSC)and metalloscope,the effect of ethylene propylene diene monomer(EPDM) on melt property of EPDM/PP blends,relative crystallinity of polypropylene(PP)and cell morphology were studied.The results showed that melt strength and relative crystallinity of PP/EPDM blend employed with low content EPDM(≤10 wt%) were lower than the pure PP,meanwhile,the viscosity of the blend melt was rarely influenced by EPDM.When content of EPDM was 9.5(wt)%,an cellular foam PP with cell density of 2.3×105cells/cm3 and cell size of about 90μm was prepared,owing to the promotion of cell nucleation on the interface of PP/EPDM and decreasing of crystallinity of PP/EPDM blend.

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Available abstract

With capillary rheometer,dynamic rheometer,differential scanning calorimeter(DSC)and metalloscope,the effect of ethylene propylene diene monomer(EPDM) on melt property of EPDM/PP blends,relative crystallinity of polypropylene(PP)and cell morphology were studied.The results showed that melt strength and relative crystallinity of PP/EPDM blend employed with low content EPDM(≤10 wt%) were lower than the pure PP,meanwhile,the viscosity of the blend melt was rarely influenced by EPDM.When content of EPDM was 9.5(wt)%,an cellular foam PP with cell density of 2.3×105cells/cm3 and cell size of about 90μm was prepared,owing to the promotion of cell nucleation on the interface of PP/EPDM and decreasing of crystallinity of PP/EPDM blend.

Key concepts: Materials science, Crystallinity, Polypropylene, Composite material, Morphology (biology), Differential scanning calorimetry, EPDM rubber, Nucleation

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