Cargando…

Tuning the Curing Efficiency of Conventional Accelerated Sulfur System for Tailoring the Properties of Natural Rubber/Bromobutyl Rubber Blends

The state of cure and the vulcanizate properties of a conventional accelerated sulfur (CV) cured 50/50 blend of natural rubber (NR) and bromobutyl rubber (BIIR) were inferior. However, this blend exhibits a higher extent of cure with remarkable improvements in its mechanical properties, particularly...

Descripción completa

Detalles Bibliográficos
Autores principales: Pöschl, Marek, Gopi Sathi, Shibulal, Stoček, Radek
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9740831/
https://www.ncbi.nlm.nih.gov/pubmed/36499962
http://dx.doi.org/10.3390/ma15238466
_version_ 1784848164012949504
author Pöschl, Marek
Gopi Sathi, Shibulal
Stoček, Radek
author_facet Pöschl, Marek
Gopi Sathi, Shibulal
Stoček, Radek
author_sort Pöschl, Marek
collection PubMed
description The state of cure and the vulcanizate properties of a conventional accelerated sulfur (CV) cured 50/50 blend of natural rubber (NR) and bromobutyl rubber (BIIR) were inferior. However, this blend exhibits a higher extent of cure with remarkable improvements in its mechanical properties, particularly the tensile strength, modulus and hardness after curing with a combination of accelerated sulfur and three parts per hundred rubber (phr) of a bismaleimide (MF(3)). Moreover, with the use of 0.25 phr of dicumyl peroxide (DCP) along with the CV/MF(3) system, the compression set property of the CV-only cured blend could be reduced from 68% to 15%. The enhanced compatibility between NR and BIIR with the aid of bismaleimide via the Diels–Alder reaction was identified as the primary reason for the improved cure state and the mechanical properties. However, the incorporation of a certain amount of bismaleimide as a crosslink in the NR phase of the blend, via a radical initiated crosslinking process by the action of DCP, is responsible for the improved compression set properties
format Online
Article
Text
id pubmed-9740831
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-97408312022-12-11 Tuning the Curing Efficiency of Conventional Accelerated Sulfur System for Tailoring the Properties of Natural Rubber/Bromobutyl Rubber Blends Pöschl, Marek Gopi Sathi, Shibulal Stoček, Radek Materials (Basel) Article The state of cure and the vulcanizate properties of a conventional accelerated sulfur (CV) cured 50/50 blend of natural rubber (NR) and bromobutyl rubber (BIIR) were inferior. However, this blend exhibits a higher extent of cure with remarkable improvements in its mechanical properties, particularly the tensile strength, modulus and hardness after curing with a combination of accelerated sulfur and three parts per hundred rubber (phr) of a bismaleimide (MF(3)). Moreover, with the use of 0.25 phr of dicumyl peroxide (DCP) along with the CV/MF(3) system, the compression set property of the CV-only cured blend could be reduced from 68% to 15%. The enhanced compatibility between NR and BIIR with the aid of bismaleimide via the Diels–Alder reaction was identified as the primary reason for the improved cure state and the mechanical properties. However, the incorporation of a certain amount of bismaleimide as a crosslink in the NR phase of the blend, via a radical initiated crosslinking process by the action of DCP, is responsible for the improved compression set properties MDPI 2022-11-28 /pmc/articles/PMC9740831/ /pubmed/36499962 http://dx.doi.org/10.3390/ma15238466 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Pöschl, Marek
Gopi Sathi, Shibulal
Stoček, Radek
Tuning the Curing Efficiency of Conventional Accelerated Sulfur System for Tailoring the Properties of Natural Rubber/Bromobutyl Rubber Blends
title Tuning the Curing Efficiency of Conventional Accelerated Sulfur System for Tailoring the Properties of Natural Rubber/Bromobutyl Rubber Blends
title_full Tuning the Curing Efficiency of Conventional Accelerated Sulfur System for Tailoring the Properties of Natural Rubber/Bromobutyl Rubber Blends
title_fullStr Tuning the Curing Efficiency of Conventional Accelerated Sulfur System for Tailoring the Properties of Natural Rubber/Bromobutyl Rubber Blends
title_full_unstemmed Tuning the Curing Efficiency of Conventional Accelerated Sulfur System for Tailoring the Properties of Natural Rubber/Bromobutyl Rubber Blends
title_short Tuning the Curing Efficiency of Conventional Accelerated Sulfur System for Tailoring the Properties of Natural Rubber/Bromobutyl Rubber Blends
title_sort tuning the curing efficiency of conventional accelerated sulfur system for tailoring the properties of natural rubber/bromobutyl rubber blends
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9740831/
https://www.ncbi.nlm.nih.gov/pubmed/36499962
http://dx.doi.org/10.3390/ma15238466
work_keys_str_mv AT poschlmarek tuningthecuringefficiencyofconventionalacceleratedsulfursystemfortailoringthepropertiesofnaturalrubberbromobutylrubberblends
AT gopisathishibulal tuningthecuringefficiencyofconventionalacceleratedsulfursystemfortailoringthepropertiesofnaturalrubberbromobutylrubberblends
AT stocekradek tuningthecuringefficiencyofconventionalacceleratedsulfursystemfortailoringthepropertiesofnaturalrubberbromobutylrubberblends