Unusual low temperature relaxation behavior of crosslinked acrylonitrile-butadiene co-polymer

Debdipta Basu; Shib Shankar Banerjee; Subhas Chandra Debnath; Mikhail Malanin; Lyaysan Amirova; Philippe Dubois; Gert Heinrich; Amit Das

doi:10.1016/j.polymer.2020.123309

Unusual low temperature relaxation behavior of crosslinked acrylonitrile-butadiene co-polymer

Debdipta Basu^*
, Shib Shankar Banerjee
, Subhas Chandra Debnath
, Mikhail Malanin
, Lyaysan Amirova
, Philippe Dubois
, Gert Heinrich
, Amit Das

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

13 Citations (Scopus)

Abstract

Conventional crosslinking of rubbers (using sulphur and peroxide vulcanization) usually leads to covalent rubber network junctions. The present article reports about a new unconventional crosslinking of acrylonitrile butadiene copolymer (NBR) by zinc chloride (ZnCl₂). This crosslinked NBR displayed very interesting relaxation properties below the glass transition temperature. In this work, detailed chemical mechanistic pathways were suggested and correlated with the low-temperature relaxation dynamics of the crosslinked material. Fourier-transform infrared spectroscopy analysis clearly indicated a coordination effect between zinc and nitrile groups. At lower temperatures, beside the glass transition, another relaxation process (β relaxation) was detected. Interestingly, a hydrolyzed crosslinked sample showed even two other additional relaxation processes. The origin of such relaxations was critically discussed from the viewpoints of modification of the polymer chains as well as low molecular weight fragments of the polymer.

Original language	English
Article number	123309
Number of pages	10
Journal	Polymer
Volume	212
Early online date	2020
DOIs	https://doi.org/10.1016/j.polymer.2020.123309
Publication status	Published - 6 Jan 2021
Publication type	A1 Journal article-refereed

Funding

Some parts of the work were supported by the Priority Programme “Soft Material Robotic Systems” (SPP 2100) from Deutsche Forschungsgemeinschaft (DFG) . The authors want to acknowledge the following people from Leibniz-Institut für Polymerforschung Dresden e.V.: Ms. Sabina Krause for the thermal analyses, Ms. M. Auf der Landwehr for the SEM-EDX, and S. Wießner, K.W. Stoeckelhuber for their fruitful discussions. We wish to also acknowledge the constructive and critical scientific discussion offered by Prof. Dr. Chayan Das, VNIT Nagpur.

Keywords

Coordination complex in elastomer
Low temperature relaxation dynamics
Metathesis
Nitrile rubber
Zinc chloride

Publication forum classification

Publication forum level 1

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Materials Chemistry

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10.1016/j.polymer.2020.123309

Cite this

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title = "Unusual low temperature relaxation behavior of crosslinked acrylonitrile-butadiene co-polymer",

abstract = "Conventional crosslinking of rubbers (using sulphur and peroxide vulcanization) usually leads to covalent rubber network junctions. The present article reports about a new unconventional crosslinking of acrylonitrile butadiene copolymer (NBR) by zinc chloride (ZnCl2). This crosslinked NBR displayed very interesting relaxation properties below the glass transition temperature. In this work, detailed chemical mechanistic pathways were suggested and correlated with the low-temperature relaxation dynamics of the crosslinked material. Fourier-transform infrared spectroscopy analysis clearly indicated a coordination effect between zinc and nitrile groups. At lower temperatures, beside the glass transition, another relaxation process (β relaxation) was detected. Interestingly, a hydrolyzed crosslinked sample showed even two other additional relaxation processes. The origin of such relaxations was critically discussed from the viewpoints of modification of the polymer chains as well as low molecular weight fragments of the polymer.",

keywords = "Coordination complex in elastomer, Low temperature relaxation dynamics, Metathesis, Nitrile rubber, Zinc chloride",

author = "Debdipta Basu and Banerjee, \{Shib Shankar\} and \{Chandra Debnath\}, Subhas and Mikhail Malanin and Lyaysan Amirova and Philippe Dubois and Gert Heinrich and Amit Das",

note = "Funding Information: Some parts of the work were supported by the Priority Programme {\textquotedblleft}Soft Material Robotic Systems{\textquotedblright} (SPP 2100) from Deutsche Forschungsgemeinschaft (DFG) . The authors want to acknowledge the following people from Leibniz-Institut f{\"u}r Polymerforschung Dresden e.V.: Ms. Sabina Krause for the thermal analyses, Ms. M. Auf der Landwehr for the SEM-EDX, and S. Wie{\ss}ner, K.W. Stoeckelhuber for their fruitful discussions. We wish to also acknowledge the constructive and critical scientific discussion offered by Prof. Dr. Chayan Das, VNIT Nagpur. Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

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AU - Basu, Debdipta

AU - Banerjee, Shib Shankar

AU - Chandra Debnath, Subhas

AU - Malanin, Mikhail

AU - Amirova, Lyaysan

AU - Dubois, Philippe

AU - Heinrich, Gert

AU - Das, Amit

N1 - Funding Information: Some parts of the work were supported by the Priority Programme “Soft Material Robotic Systems” (SPP 2100) from Deutsche Forschungsgemeinschaft (DFG) . The authors want to acknowledge the following people from Leibniz-Institut für Polymerforschung Dresden e.V.: Ms. Sabina Krause for the thermal analyses, Ms. M. Auf der Landwehr for the SEM-EDX, and S. Wießner, K.W. Stoeckelhuber for their fruitful discussions. We wish to also acknowledge the constructive and critical scientific discussion offered by Prof. Dr. Chayan Das, VNIT Nagpur. Publisher Copyright: © 2020 Elsevier Ltd Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2021/1/6

Y1 - 2021/1/6

N2 - Conventional crosslinking of rubbers (using sulphur and peroxide vulcanization) usually leads to covalent rubber network junctions. The present article reports about a new unconventional crosslinking of acrylonitrile butadiene copolymer (NBR) by zinc chloride (ZnCl2). This crosslinked NBR displayed very interesting relaxation properties below the glass transition temperature. In this work, detailed chemical mechanistic pathways were suggested and correlated with the low-temperature relaxation dynamics of the crosslinked material. Fourier-transform infrared spectroscopy analysis clearly indicated a coordination effect between zinc and nitrile groups. At lower temperatures, beside the glass transition, another relaxation process (β relaxation) was detected. Interestingly, a hydrolyzed crosslinked sample showed even two other additional relaxation processes. The origin of such relaxations was critically discussed from the viewpoints of modification of the polymer chains as well as low molecular weight fragments of the polymer.

AB - Conventional crosslinking of rubbers (using sulphur and peroxide vulcanization) usually leads to covalent rubber network junctions. The present article reports about a new unconventional crosslinking of acrylonitrile butadiene copolymer (NBR) by zinc chloride (ZnCl2). This crosslinked NBR displayed very interesting relaxation properties below the glass transition temperature. In this work, detailed chemical mechanistic pathways were suggested and correlated with the low-temperature relaxation dynamics of the crosslinked material. Fourier-transform infrared spectroscopy analysis clearly indicated a coordination effect between zinc and nitrile groups. At lower temperatures, beside the glass transition, another relaxation process (β relaxation) was detected. Interestingly, a hydrolyzed crosslinked sample showed even two other additional relaxation processes. The origin of such relaxations was critically discussed from the viewpoints of modification of the polymer chains as well as low molecular weight fragments of the polymer.

KW - Coordination complex in elastomer

KW - Low temperature relaxation dynamics

KW - Metathesis

KW - Nitrile rubber

KW - Zinc chloride

U2 - 10.1016/j.polymer.2020.123309

DO - 10.1016/j.polymer.2020.123309

M3 - Article

AN - SCOPUS:85097721089

SN - 0032-3861

VL - 212

JO - Polymer

JF - Polymer

M1 - 123309

ER -

Unusual low temperature relaxation behavior of crosslinked acrylonitrile-butadiene co-polymer

Abstract

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Keywords

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