Phase morphology and thermal behavior of PP/metallocene ultralow density polyethylene blends

Polypropylene without any modification is too brittle for any use at sub-ambient temperatures. Blends of polypropylene with various ULDPE resins were made to investigate how much the material toughness could be improved and what affect the modifier had on the-structure of the composite. DSC analysis of these materials indicates that the crystallinity of these modifiers has been significantly retarded. It is proposed that there is an amorphous shell around the modifier particle because it exhibited a lower heat of fusion than expected.