Rheometer Evidences for the Co-Curing Effect of a Bismaleimide in Conjunction with the Accelerated Sulfur on Natural Rubber/Chloroprene Rubber Blends
The rheometer curing curves of neat natural rubber (NR) and neat chloroprene rubber (CR) with maleide F (MF) exhibit considerable crosslinking torque at 180 °C. This indicates that MF can crosslink both these rubbers via Alder-ene reactions. Based on this knowledge, MF has been introduced as a co-cr...
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doaj-ea815c556c244637875efd3bbf4e6e042021-05-31T23:25:59ZengMDPI AGPolymers2073-43602021-05-01131510151010.3390/polym13091510Rheometer Evidences for the Co-Curing Effect of a Bismaleimide in Conjunction with the Accelerated Sulfur on Natural Rubber/Chloroprene Rubber BlendsMarek Pöschl0Shibulal Gopi Sathi1Radek Stoček2Ondřej Kratina3Centre of Polymer Systems, Tomas Bata University in Zlín, Třida Tomáše Bati 5678, 760 01 Zlín, Czech RepublicCentre of Polymer Systems, Tomas Bata University in Zlín, Třida Tomáše Bati 5678, 760 01 Zlín, Czech RepublicCentre of Polymer Systems, Tomas Bata University in Zlín, Třida Tomáše Bati 5678, 760 01 Zlín, Czech RepublicCentre of Polymer Systems, Tomas Bata University in Zlín, Třida Tomáše Bati 5678, 760 01 Zlín, Czech RepublicThe rheometer curing curves of neat natural rubber (NR) and neat chloroprene rubber (CR) with maleide F (MF) exhibit considerable crosslinking torque at 180 °C. This indicates that MF can crosslink both these rubbers via Alder-ene reactions. Based on this knowledge, MF has been introduced as a co-crosslinking agent for a 50/50 blend of NR and CR in conjunction with accelerated sulfur. The delta (Δ) torque obtained from the curing curves of a blend with the addition of 1 phr MF was around 62% higher than those without MF. As the content of MF increased to 3 phr, the Δ torque was further raised to 236%. Moreover, the mechanical properties, particularly the tensile strength of the blend with the addition of 1 phr MF in conjunction with the accelerated sulfur, was around 201% higher than the blend without MF. The overall tensile properties of the blends cured with MF were almost retained even after ageing the samples at 70 °C for 72 h. This significant improvement in the curing torque and the tensile properties of the blends indicates that MF can co-crosslink between NR and CR via the Diels–Alder reaction.https://www.mdpi.com/2073-4360/13/9/1510rubbercuringbismaleimidetensile strengthDiels–Alder reaction |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Marek Pöschl Shibulal Gopi Sathi Radek Stoček Ondřej Kratina |
spellingShingle |
Marek Pöschl Shibulal Gopi Sathi Radek Stoček Ondřej Kratina Rheometer Evidences for the Co-Curing Effect of a Bismaleimide in Conjunction with the Accelerated Sulfur on Natural Rubber/Chloroprene Rubber Blends Polymers rubber curing bismaleimide tensile strength Diels–Alder reaction |
author_facet |
Marek Pöschl Shibulal Gopi Sathi Radek Stoček Ondřej Kratina |
author_sort |
Marek Pöschl |
title |
Rheometer Evidences for the Co-Curing Effect of a Bismaleimide in Conjunction with the Accelerated Sulfur on Natural Rubber/Chloroprene Rubber Blends |
title_short |
Rheometer Evidences for the Co-Curing Effect of a Bismaleimide in Conjunction with the Accelerated Sulfur on Natural Rubber/Chloroprene Rubber Blends |
title_full |
Rheometer Evidences for the Co-Curing Effect of a Bismaleimide in Conjunction with the Accelerated Sulfur on Natural Rubber/Chloroprene Rubber Blends |
title_fullStr |
Rheometer Evidences for the Co-Curing Effect of a Bismaleimide in Conjunction with the Accelerated Sulfur on Natural Rubber/Chloroprene Rubber Blends |
title_full_unstemmed |
Rheometer Evidences for the Co-Curing Effect of a Bismaleimide in Conjunction with the Accelerated Sulfur on Natural Rubber/Chloroprene Rubber Blends |
title_sort |
rheometer evidences for the co-curing effect of a bismaleimide in conjunction with the accelerated sulfur on natural rubber/chloroprene rubber blends |
publisher |
MDPI AG |
series |
Polymers |
issn |
2073-4360 |
publishDate |
2021-05-01 |
description |
The rheometer curing curves of neat natural rubber (NR) and neat chloroprene rubber (CR) with maleide F (MF) exhibit considerable crosslinking torque at 180 °C. This indicates that MF can crosslink both these rubbers via Alder-ene reactions. Based on this knowledge, MF has been introduced as a co-crosslinking agent for a 50/50 blend of NR and CR in conjunction with accelerated sulfur. The delta (Δ) torque obtained from the curing curves of a blend with the addition of 1 phr MF was around 62% higher than those without MF. As the content of MF increased to 3 phr, the Δ torque was further raised to 236%. Moreover, the mechanical properties, particularly the tensile strength of the blend with the addition of 1 phr MF in conjunction with the accelerated sulfur, was around 201% higher than the blend without MF. The overall tensile properties of the blends cured with MF were almost retained even after ageing the samples at 70 °C for 72 h. This significant improvement in the curing torque and the tensile properties of the blends indicates that MF can co-crosslink between NR and CR via the Diels–Alder reaction. |
topic |
rubber curing bismaleimide tensile strength Diels–Alder reaction |
url |
https://www.mdpi.com/2073-4360/13/9/1510 |
work_keys_str_mv |
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