Assertion: bumper | /r/MadeOf | block pe-pp copolymer
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text: This different behavior could be associated with the different copolymers which bumpers are made with: block PE-PP copolymer (sample A) improves the compatibility EPM/PP better than copolymer made by PE sequences with PP scattered units (samples B, C) because PP segments in the segmented copolymer are highly compatible with the matrix and can induce formation of very small domains of a finely dispersed PE phase in PP, with improvement in impact strength .