Crystallization and melting of β-nucleated isotactic polypropylene

J. Varga, I. Mudra, G. W. Ehrenstein

Research output: Contribution to journalArticle

81 Citations (Scopus)

Abstract

Ca salts of suberic (Ca-Sub) and pimelic acid (Ca-Pim) were synthesized and used as β-nucleating agents in different grades of isotactic polypropylene (IPP). Propylene homo-, random- and block-copolymers containing these additives crystallize principally in pure β-modification as demonstrated in isothermal and non-isothermal crystallization experiments. Ca-Sub proved the most effective β-nucleating agent known, so far. It broadens the upper crystallization temperature range of pure β-IPP formation up to 140 °C. The effect of the additives on the crystallization and melting characteristics of the polymers was studied. The degree of crystallinity of the β-modification was found to be markedly higher than that of α-IPP. High temperature melting peak broadening was first observed and discussed in literary results regarding the same phenomenon for α-IPP.

Original languageEnglish
Pages (from-to)1047-1057
Number of pages11
JournalJournal of Thermal Analysis and Calorimetry
Volume56
Issue number3
Publication statusPublished - 1999

Fingerprint

Polypropylenes
Crystallization
polypropylene
Melting
melting
crystallization
Pimelic Acids
Salts
salts
block copolymers
propylene
Block copolymers
Propylene
Melting point
grade
crystallinity
Polymers
acids
Acids
polymers

ASJC Scopus subject areas

  • Chemical Engineering(all)

Cite this

Crystallization and melting of β-nucleated isotactic polypropylene. / Varga, J.; Mudra, I.; Ehrenstein, G. W.

In: Journal of Thermal Analysis and Calorimetry, Vol. 56, No. 3, 1999, p. 1047-1057.

Research output: Contribution to journalArticle

Varga, J. ; Mudra, I. ; Ehrenstein, G. W. / Crystallization and melting of β-nucleated isotactic polypropylene. In: Journal of Thermal Analysis and Calorimetry. 1999 ; Vol. 56, No. 3. pp. 1047-1057.
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