Publication detail

Processing Degradation Index (PDI) – A Quantitative Measure of Processing Stability of Polypropylene

TOCHÁČEK, J. JANČÁŘ, J.

Original Title

Type

journal article in Web of Science

Language

English

Original Abstract

Multiple extrusion simulating thermo-mechanical processing conditions on a laboratory scale has commonly been accepted as a tool for assessing the processing stability of polypropylene. The graphical output of multiple extrusion is the processing curve (MFI vs. number of extrusions), the slope and position of which provide information on the extent of polymer degradation. Processing degradation index (PDI) has been proposed as the way of numerical processing of this curve, which allows expressing its position by means of a single parameter. The application of PDI then allows direct construction of plots showing the dependence of processing stability upon variables such as additives concentration, matrix composition, temperature or simply the origin of the polymer. PDI is a relative parameter and has always be related to the given machinery, temperature and number of extrusions.

Keywords

Degradation; Processing stability; Processing index; Multiple extrusion; Thermo-mechanical degradation; Melt processing; Polypropylene; PDI

Authors

TOCHÁČEK, J.; JANČÁŘ, J.

RIV year

2012

Released

4. 12. 2012

Publisher

Elsevier

Location

London, GB

ISBN

0142-9418

Periodical

POLYMER TESTING

Year of study

Number

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1115

Pages to

1120

Pages count

BibTex

@article{BUT96365,
  author="Jiří {Tocháček} and Josef {Jančář}",
  title="Processing Degradation Index (PDI) – A Quantitative Measure of Processing Stability of Polypropylene",
  journal="POLYMER TESTING",
  year="2012",
  volume="31",
  number="31",
  pages="1115--1120",
  doi="10.1016/j.polymertesting.2012.08.004",
  issn="0142-9418"
}