Publication detail

The role of organic phosphite primary structure in the overall stabilization performance in polypropylene

TOCHÁČEK, J. MATUŠKA, R. POLÁČEK, P. ŠTOHANDL, J.

Original Title

Type

journal article in Web of Science

Language

English

Original Abstract

The role of the primary P3+ functionality in the phosphite overall stabilization performance was reevaluated. Tris(2,4-di-t-Bu-phenyl)phosphite (P-1) and its oxidation product tris(2,4-di-t-Bu-phenyl) phosphate (P-1ox) were tested both alone and in the presence of hindered phenol during processing in polypropylene. Efficiencies were quantified using the processing degradation index (PDI). The position of the traditional multiple extrusion curve was determined by a single parameter, describing the degree of polymer degradation. Its reciprocal allowed calculating formulations relative efficiencies. It was shown that oxidation of P3+ into P5+ is responsible for 75 % phosphite stabilization performance, regardless phosphite acts alone or in combination with phenol. If P3+ is completely oxidized, stabilizer still works. For the residual performance, the reactions of 2,4-di-t-Bu-phenyl substituents (secondary structure), are responsible. Besides processing, reactions of P3+ also contribute to the long-term stability at 150 C. Once phosphite is oxidized, the secondary structure does not contribute to the long-term stability at all. © 2016 Elsevier Ltd. All rights reserved.

Keywords

Phosphite; Phosphate; Oxidation; Action mechanism; Processing

Authors

TOCHÁČEK, J.; MATUŠKA, R.; POLÁČEK, P.; ŠTOHANDL, J.

Released

1. 2. 2017

Publisher

Elsevier

Location

Velká Británie

ISBN

0142-9418

Periodical

POLYMER TESTING

Year of study

Number

State

United Kingdom of Great Britain and Northern Ireland

Pages from

126

Pages to

132

Pages count

BibTex

@article{BUT130309,
  author="Jiří {Tocháček} and Radek {Matuška} and Petr {Poláček} and Jiří {Štohandl}",
  title="The role of organic phosphite primary structure in the overall stabilization performance in polypropylene",
  journal="POLYMER TESTING",
  year="2017",
  volume="57",
  number="1",
  pages="126--132",
  doi="10.1016/j.polymertesting.2016.11.014",
  issn="0142-9418"
}