Annealing of the β‐modification of polypropylene

J. Varga, Ferenc Tóth, D. O. Hummel

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

Expressive memory effect has been proven in the course of the annealing of the β‐modification of polypropylene (β‐PP). The character of the structural changes taking place in β‐PP during annealing strongly depends on the thermal history. In dependence on the thermal history βα or ββ‐recrystallization takes place during thermal treatment. In case the annealing starts from the crystallization temperature β‐PP is recrystallized into a more perfect structure with higher melting point ‐ similarly to thermodynamically stable modifications. The samples cooled below a certain temperature before subjected to annealing transform partly or fully into the α‐modification. The βα‐recrystallization tendency prevalent on the effect of recooling can be reduced or eliminated with the aid of stepwise annealing with decreasing temperature steps.

Original languageEnglish
Pages (from-to)213-223
Number of pages11
JournalMakromolekulare Chemie. Macromolecular Symposia
Volume5
Issue number1
DOIs
Publication statusPublished - 1986

Fingerprint

Polypropylenes
polypropylene
Annealing
annealing
histories
Crystallization
Temperature
melting points
temperature
Melting point
tendencies
Heat treatment
crystallization
Data storage equipment
Hot Temperature

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

Cite this

Annealing of the β‐modification of polypropylene. / Varga, J.; Tóth, Ferenc; Hummel, D. O.

In: Makromolekulare Chemie. Macromolecular Symposia, Vol. 5, No. 1, 1986, p. 213-223.

Research output: Contribution to journalArticle

Varga, J. ; Tóth, Ferenc ; Hummel, D. O. / Annealing of the β‐modification of polypropylene. In: Makromolekulare Chemie. Macromolecular Symposia. 1986 ; Vol. 5, No. 1. pp. 213-223.
@article{3073e8542b0a471e8e5119c65a24144c,
title = "Annealing of the β‐modification of polypropylene",
abstract = "Expressive memory effect has been proven in the course of the annealing of the β‐modification of polypropylene (β‐PP). The character of the structural changes taking place in β‐PP during annealing strongly depends on the thermal history. In dependence on the thermal history βα or ββ‐recrystallization takes place during thermal treatment. In case the annealing starts from the crystallization temperature β‐PP is recrystallized into a more perfect structure with higher melting point ‐ similarly to thermodynamically stable modifications. The samples cooled below a certain temperature before subjected to annealing transform partly or fully into the α‐modification. The βα‐recrystallization tendency prevalent on the effect of recooling can be reduced or eliminated with the aid of stepwise annealing with decreasing temperature steps.",
author = "J. Varga and Ferenc T{\'o}th and Hummel, {D. O.}",
year = "1986",
doi = "10.1002/masy.19860050120",
language = "English",
volume = "5",
pages = "213--223",
journal = "Macromolecular Symposia",
issn = "1022-1360",
publisher = "Wiley-VCH Verlag",
number = "1",

}

TY - JOUR

T1 - Annealing of the β‐modification of polypropylene

AU - Varga, J.

AU - Tóth, Ferenc

AU - Hummel, D. O.

PY - 1986

Y1 - 1986

N2 - Expressive memory effect has been proven in the course of the annealing of the β‐modification of polypropylene (β‐PP). The character of the structural changes taking place in β‐PP during annealing strongly depends on the thermal history. In dependence on the thermal history βα or ββ‐recrystallization takes place during thermal treatment. In case the annealing starts from the crystallization temperature β‐PP is recrystallized into a more perfect structure with higher melting point ‐ similarly to thermodynamically stable modifications. The samples cooled below a certain temperature before subjected to annealing transform partly or fully into the α‐modification. The βα‐recrystallization tendency prevalent on the effect of recooling can be reduced or eliminated with the aid of stepwise annealing with decreasing temperature steps.

AB - Expressive memory effect has been proven in the course of the annealing of the β‐modification of polypropylene (β‐PP). The character of the structural changes taking place in β‐PP during annealing strongly depends on the thermal history. In dependence on the thermal history βα or ββ‐recrystallization takes place during thermal treatment. In case the annealing starts from the crystallization temperature β‐PP is recrystallized into a more perfect structure with higher melting point ‐ similarly to thermodynamically stable modifications. The samples cooled below a certain temperature before subjected to annealing transform partly or fully into the α‐modification. The βα‐recrystallization tendency prevalent on the effect of recooling can be reduced or eliminated with the aid of stepwise annealing with decreasing temperature steps.

UR - http://www.scopus.com/inward/record.url?scp=84994985659&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84994985659&partnerID=8YFLogxK

U2 - 10.1002/masy.19860050120

DO - 10.1002/masy.19860050120

M3 - Article

AN - SCOPUS:84994985659

VL - 5

SP - 213

EP - 223

JO - Macromolecular Symposia

JF - Macromolecular Symposia

SN - 1022-1360

IS - 1

ER -