Curing and mechanical behavior of carboxylated NBR containing hygrothermally decomposed polyurethane

C. Radhesh Kumar, J. Karger-Kocsis

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Hygrothermally decomposed polyester-urethane (HD-PUR) has been added as modifier (up to 20 phr) to sulfur crosslinked carboxylated nitrile rubber (XNBR). The curing and mechanical characteristics of the XNBR have been investigated as a function of the HD-PUR loading in presence and absence of carbon black (CB). The addition of HD-PUR increased the cure rate of both unfilled and CB filled XNBR but resulted in compounds of lower crosslink density and thus of lower stiffness and strength. Based on infrared spectroscopic results it was speculated that the amine functionality of HD-PUR affected the formation of the ionic clusters formed by the reaction between the -COOH groups of XNBR and ZnO. This occurred likely via a coordination complex. Evidence was also found for the formation of -CONH- linkages. Both coordination complexing and chemical reaction between -COOH and -NH2 resulted in a lower overall "crosslinking degree" and as a consequence HD-PUR acted as plasticizer in XNBR.

Original languageEnglish
Pages (from-to)2231-2237
Number of pages7
JournalEuropean Polymer Journal
Volume38
Issue number11
DOIs
Publication statusPublished - Nov 2002

Fingerprint

urethanes
Polyesters
Polyurethanes
Urethane
polyesters
curing
Curing
Soot
Carbon black
Coordination reactions
Plasticizers
Nitriles
plasticizers
carbon
Coordination Complexes
nitriles
Rubber
crosslinking
rubber
Sulfur

Keywords

  • Carboxylated nitrile rubber (XNBR)
  • Hygrothermally decomposed polyurethane
  • Mechanical properties
  • Recycling
  • Vulcanization

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

Cite this

Curing and mechanical behavior of carboxylated NBR containing hygrothermally decomposed polyurethane. / Kumar, C. Radhesh; Karger-Kocsis, J.

In: European Polymer Journal, Vol. 38, No. 11, 11.2002, p. 2231-2237.

Research output: Contribution to journalArticle

@article{7652e6c4d5ca4d168a7b44c89a1ed398,
title = "Curing and mechanical behavior of carboxylated NBR containing hygrothermally decomposed polyurethane",
abstract = "Hygrothermally decomposed polyester-urethane (HD-PUR) has been added as modifier (up to 20 phr) to sulfur crosslinked carboxylated nitrile rubber (XNBR). The curing and mechanical characteristics of the XNBR have been investigated as a function of the HD-PUR loading in presence and absence of carbon black (CB). The addition of HD-PUR increased the cure rate of both unfilled and CB filled XNBR but resulted in compounds of lower crosslink density and thus of lower stiffness and strength. Based on infrared spectroscopic results it was speculated that the amine functionality of HD-PUR affected the formation of the ionic clusters formed by the reaction between the -COOH groups of XNBR and ZnO. This occurred likely via a coordination complex. Evidence was also found for the formation of -CONH- linkages. Both coordination complexing and chemical reaction between -COOH and -NH2 resulted in a lower overall {"}crosslinking degree{"} and as a consequence HD-PUR acted as plasticizer in XNBR.",
keywords = "Carboxylated nitrile rubber (XNBR), Hygrothermally decomposed polyurethane, Mechanical properties, Recycling, Vulcanization",
author = "Kumar, {C. Radhesh} and J. Karger-Kocsis",
year = "2002",
month = "11",
doi = "10.1016/S0014-3057(02)00122-2",
language = "English",
volume = "38",
pages = "2231--2237",
journal = "European Polymer Journal",
issn = "0014-3057",
publisher = "Elsevier Limited",
number = "11",

}

TY - JOUR

T1 - Curing and mechanical behavior of carboxylated NBR containing hygrothermally decomposed polyurethane

AU - Kumar, C. Radhesh

AU - Karger-Kocsis, J.

PY - 2002/11

Y1 - 2002/11

N2 - Hygrothermally decomposed polyester-urethane (HD-PUR) has been added as modifier (up to 20 phr) to sulfur crosslinked carboxylated nitrile rubber (XNBR). The curing and mechanical characteristics of the XNBR have been investigated as a function of the HD-PUR loading in presence and absence of carbon black (CB). The addition of HD-PUR increased the cure rate of both unfilled and CB filled XNBR but resulted in compounds of lower crosslink density and thus of lower stiffness and strength. Based on infrared spectroscopic results it was speculated that the amine functionality of HD-PUR affected the formation of the ionic clusters formed by the reaction between the -COOH groups of XNBR and ZnO. This occurred likely via a coordination complex. Evidence was also found for the formation of -CONH- linkages. Both coordination complexing and chemical reaction between -COOH and -NH2 resulted in a lower overall "crosslinking degree" and as a consequence HD-PUR acted as plasticizer in XNBR.

AB - Hygrothermally decomposed polyester-urethane (HD-PUR) has been added as modifier (up to 20 phr) to sulfur crosslinked carboxylated nitrile rubber (XNBR). The curing and mechanical characteristics of the XNBR have been investigated as a function of the HD-PUR loading in presence and absence of carbon black (CB). The addition of HD-PUR increased the cure rate of both unfilled and CB filled XNBR but resulted in compounds of lower crosslink density and thus of lower stiffness and strength. Based on infrared spectroscopic results it was speculated that the amine functionality of HD-PUR affected the formation of the ionic clusters formed by the reaction between the -COOH groups of XNBR and ZnO. This occurred likely via a coordination complex. Evidence was also found for the formation of -CONH- linkages. Both coordination complexing and chemical reaction between -COOH and -NH2 resulted in a lower overall "crosslinking degree" and as a consequence HD-PUR acted as plasticizer in XNBR.

KW - Carboxylated nitrile rubber (XNBR)

KW - Hygrothermally decomposed polyurethane

KW - Mechanical properties

KW - Recycling

KW - Vulcanization

UR - http://www.scopus.com/inward/record.url?scp=0036833182&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036833182&partnerID=8YFLogxK

U2 - 10.1016/S0014-3057(02)00122-2

DO - 10.1016/S0014-3057(02)00122-2

M3 - Article

VL - 38

SP - 2231

EP - 2237

JO - European Polymer Journal

JF - European Polymer Journal

SN - 0014-3057

IS - 11

ER -