Novel thermoplastic elastomer of reactive NR and PA6 blends

Rattanapane S., . and Seadan M., . and Luksameevanish V, . Novel thermoplastic elastomer of reactive NR and PA6 blends. pp. 205-219. ISSN 1511-1768

Relevant developments in polymer blends based on immiscible polymers have shown how efficient the amphiphilic species are in improving mechanical properties and morphological stabilisation through reactive reaction and dynamic vulcanisation on successive processing steps. However it appears that in blends of immiscible polymers the interfacial compatibilities of polymers are necessarily mixed before the dynamically vulcanised process to obtain good mechanical properties of thermoplastic elastomers. The induced reactivity in a single screw extrusion is based on a mixture of peroxide (Perkadox 14) reactive monomer (maleic anhydride) and activators (ZnO and stearic acid). The results confirm that a good level of reciprocal grafting occurred between NR and PA6. Their morphology showed a good interfacial adhesion with finer continuous phase of PA6. Dynamically vulcanised processes were done using several vulcanising systems on a single screw extruder. It showed that the suitable vulcanising agent was a phenolic resin (SP-1045). The produced thermoplastic elastomer showed a fine crosslinked dispersed phase NR which corresponded to good mechanical properties of high tensile strength and elongation at break. The PA6/NR reactive blend TPE containing PA6 40 and NR 60 had a tensile strengthlevel about 12 MPa with the elongation at break about 135. It also showed very good oil resistance at an ultra-high temperature of 200C.

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Abstract

Relevant developments in polymer blends based on immiscible polymers have shown how efficient the amphiphilic species are in improving mechanical properties and morphological stabilisation through reactive reaction and dynamic vulcanisation on successive processing steps. However it appears that in blends of immiscible polymers the interfacial compatibilities of polymers are necessarily mixed before the dynamically vulcanised process to obtain good mechanical properties of thermoplastic elastomers. The induced reactivity in a single screw extrusion is based on a mixture of peroxide (Perkadox 14) reactive monomer (maleic anhydride) and activators (ZnO and stearic acid). The results confirm that a good level of reciprocal grafting occurred between NR and PA6. Their morphology showed a good interfacial adhesion with finer continuous phase of PA6. Dynamically vulcanised processes were done using several vulcanising systems on a single screw extruder. It showed that the suitable vulcanising agent was a phenolic resin (SP-1045). The produced thermoplastic elastomer showed a fine crosslinked dispersed phase NR which corresponded to good mechanical properties of high tensile strength and elongation at break. The PA6/NR reactive blend TPE containing PA6 40 and NR 60 had a tensile strengthlevel about 12 MPa with the elongation at break about 135. It also showed very good oil resistance at an ultra-high temperature of 200C.

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Item Type:	Article
AGROVOC Term:	Elastomers
AGROVOC Term:	Natural rubber
AGROVOC Term:	Polymers
AGROVOC Term:	Mechanical properties
AGROVOC Term:	morphology
AGROVOC Term:	Vulcanization
AGROVOC Term:	Cross-linking
AGROVOC Term:	Tensile strength
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/23119

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