Influence of level of interaction on the mechanical and dynamic mechanical properties of thermoplastic elastomers

Bhowmick Anil K., . and Jha Abhijit, . Influence of level of interaction on the mechanical and dynamic mechanical properties of thermoplastic elastomers. pp. 215-222. ISSN 0127-7065

Nylon-6 and acrylate rubber (ACM) were melt-blended in a Brabender Plasticorder at 220C and 40 r.p.m. rotor speed. The reactive nature of the blend is reflected in the mixing torque behaviour of the blends at different compositions. The solubility characteristics of the blends in formic acid solution gives an approximate idea of the amount ofnylon-6 grafted onto ACM and vice-versa. The influence of interaction between the two polymers on the mechanical and the dynamic mechanical properties of the blends are analysed in details and the results are interpreted on the basis of the formation of nylon-ACM graft copolymer at the interfaces. The dynamic mechanical thermal analysis (DMTA) reveals a two-phase morphological structure indicating incompatibility of the blend components. The grafting reaction results in dramatic increase in both the storage modulus and the Youngs modulus of blends. The presence of grafted rubber chains is reflected in the secondary transition of the rubber loss peak at higher temperature. Also a substantial improvement in the damping properties of the blends in the service temperature range (i.e. 25C to 175C) is revealed from the DMTA results. The dynamic vulcanisation of the ACM phase during melt-mixing improves the elongation at break values of the blends.

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Abstract

Nylon-6 and acrylate rubber (ACM) were melt-blended in a Brabender Plasticorder at 220C and 40 r.p.m. rotor speed. The reactive nature of the blend is reflected in the mixing torque behaviour of the blends at different compositions. The solubility characteristics of the blends in formic acid solution gives an approximate idea of the amount ofnylon-6 grafted onto ACM and vice-versa. The influence of interaction between the two polymers on the mechanical and the dynamic mechanical properties of the blends are analysed in details and the results are interpreted on the basis of the formation of nylon-ACM graft copolymer at the interfaces. The dynamic mechanical thermal analysis (DMTA) reveals a two-phase morphological structure indicating incompatibility of the blend components. The grafting reaction results in dramatic increase in both the storage modulus and the Youngs modulus of blends. The presence of grafted rubber chains is reflected in the secondary transition of the rubber loss peak at higher temperature. Also a substantial improvement in the damping properties of the blends in the service temperature range (i.e. 25C to 175C) is revealed from the DMTA results. The dynamic vulcanisation of the ACM phase during melt-mixing improves the elongation at break values of the blends.

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Item Type:	Article
AGROVOC Term:	Elastomers
AGROVOC Term:	Mechanical properties
AGROVOC Term:	Polymers
AGROVOC Term:	Rubber
AGROVOC Term:	Compressibility
AGROVOC Term:	Blending
AGROVOC Term:	Vulcanization
AGROVOC Term:	Grafting
AGROVOC Term:	Mixing
AGROVOC Term:	Temperature
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/23349

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