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Influence of phase structure on impact toughening of isotactic polypropylene by metallocene-catalyzed linear low-density polyethylene

✍ Scribed by N. Kukaleva; M. Jollands; F. Cser; E. Kosior

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
327 KB
Volume
76
Category
Article
ISSN
0021-8995

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✦ Synopsis

In the present study isotactic polypropylene (PP) and metallocene-catalyzed linear low-density polyethylene (mLLDPE) were blended together to obtain thermoplastic materials (compositions) with improved toughness. Structure-property relationships were determined for these compositions with the help of scanning electron microscopy (SEM). Special emphasis was made on tracing the morphological features that led to the optimum mechanical performance. A co-continuous type of structure was found to have much superior toughness as compared to a dispersed-matrix structural type, for blends comprised of the same components (PP and mLLDPE). The study showed the fascinating possibility of creating toughened PP blends by inducing a co-continuous structure.

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Comparison of structure and properties of conventional and “high-crystallinity” isotactic polypropylenes and their blends with metallocene-catalyzed linear low-density polyethylene. I. Relationships between rheological behavior and thermal and physical properties
✍ N. Kukaleva; F. Cser; M. Jollands; E. Kosior 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 189 KB 👁 2 views

The present study was conducted to compare the structure and properties of conventional and so-called "high-crystallinity" (hcr) polypropylene (PP) and to establish characteristic features of the latter that are responsible for its superior thermal and mechanical performance. Moreover, structure-pro