In:
Macromolecular Symposia, Wiley, Vol. 377, No. 1 ( 2018-02)
Abstract:
The effect of ethylene content, in a range between 8 and 11 mol%, and distribution on the solid‐state morphology of five impact polypropylene copolymers (IPC) have been studied via SEM, fractionation and microstructural characterization via gel permeation chromatography (GPC), high‐temperature thermal‐gradient interaction chromatography (HT‐TGIC), and differential scanning calorimetry (DSC). All copolymers display heterophasic morphology, with rubbery droplets randomly distributed in a predominant i PP matrix. While the mass fraction of amorphous ethylene‐propylene rubber molecules is very similar for all IPC studied, the size of the droplets increases from 0.6 to 1.1 μm with increasing ethylene content. This change in droplet size is correlated with changes in the composition of the crystalline ethylene‐propylene (CEP) component extracted via fractionation.
Type of Medium:
Online Resource
ISSN:
1022-1360
,
1521-3900
DOI:
10.1002/masy.201700046
Language:
English
Publisher:
Wiley
Publication Date:
2018
detail.hit.zdb_id:
283775-4
detail.hit.zdb_id:
2038549-3
