Towards phase transformation toughened semicrystalline polymers

Research output: Contribution to journalArticle

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Abstract

Phase transformation toughening (PTT), characterized by a transition from a metastable to a stable crystalline phase and associated with volume expansion, is widely used for toughness improvement of metals and ceramics. The essential prerequisites of this toughening concept are met also for semicrystalline polymers since they are polymorphous and capable to undergo transformation from one crystalline phase to an other under mechanical stresses. The transition is, however, mostly connected to volume contraction, i.e. just the opposite what is being exploited in toughened steels and ceramics. It was argued that an irreversible transformation from a less dense crystalline phase to a more dense one could also be beneficial for toughness upgrading in polymers. This transition is combined with changes in lamellar and molecular level resulting in a "strain-hardened" microstructure, that can be considered as the best possible response of the polymer upon mechanical loading ("adaptive" toughening). The main advantage of the PTT concept is that toughness improvement is achieved without incorporation of foreign materials which is the guarantee of easy recycling.

Original languageEnglish
Pages (from-to)119-124
Number of pages6
JournalPolymer Bulletin
Volume36
Issue number1
Publication statusPublished - 1996

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Toughening
toughness
phase transformations
Polymers
Phase transitions
Toughness
polymers
Crystalline materials
ceramics
upgrading
recycling
contraction
Steel
steels
Recycling
microstructure
expansion
Metals
metals
Microstructure

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics

Cite this

Towards phase transformation toughened semicrystalline polymers. / Karger-Kocsis, J.

In: Polymer Bulletin, Vol. 36, No. 1, 1996, p. 119-124.

Research output: Contribution to journalArticle

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