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Material Properties and Influence of Molecular Weight and Testing Rate on Adhesion Properties of Epoxidized Natural Rubber-Based Adhesives

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Abstract

The effect of molecular weight and testing rate on peel and shear strength of epoxidized natural rubber (ENR-50)-based adhesive was investigated using petro resin as the tackifier. Toluene and polyethylene terephthalate were used as the solvent and substrate respectively. Peel and shear strength were determined by a Llyod Adhesion Tester operating at different rates of testing. Result shows that peel strength and shear strength increases up to an optimum molecular weight of 4.2 × 104 g/mol of ENR-50. This observation is attributed to the combined effects of wettability and mechanical strength of rubber for peel strength. For shear strength, it is ascribed to the optimum cohesive and adhesive strength. Both peel strength and shear strength increases with increasing rate of testing, an observation which is associated to the viscoeslastic response of the adhesive. Thermal study, SEM and FTIR study confirms the miscibility of tackifier with ENR-50.

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Abbreviations

ASTM:

American Society for Testing and Materials

AO-80:

3,9-bis[1,1-dimethyl-2{β-(3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy}ethyl]-2,4,8,10-tetraoxaspiro[5,5]-undecane

ENR:

Epoxidized natural rubber

NR:

Natural rubber

PET:

Polyethylene terephthalate

PVP:

Poly (vinylpyrrolidone)

PSA:

Pressure-sensitive adhesive

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Acknowledgments

The authors acknowledge the research grant (FRGS) and post doctoral funding provided by Universiti Sains Malaysia that has resulted in this article.

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  1. Division of Bio-Resource, Paper and Coatings Technology, School of Industrial Technology, Universiti Sains Malaysia, 11800, Penang, Malaysia

    Imran Khan & B. T. Poh

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Correspondence to Imran Khan.

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Khan, I., Poh, B.T. Material Properties and Influence of Molecular Weight and Testing Rate on Adhesion Properties of Epoxidized Natural Rubber-Based Adhesives. J Polym Environ 20, 132–141 (2012). https://doi.org/10.1007/s10924-011-0369-2

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