Abstract
This paper reported the effect of starch-based additive (PSN), on the rheology, morphology and thermal behavior of low-density polyethylene (LDPE). PSN was a commercial masterbatch of corn starch and linear low-density polyethylene (LLDPE) in the ratio of 45/55. Compositions of LDPE/PSN blend ratios at 100/0, 80/20, 70/30 and 60/40 were prepared by melt blending. It was found that addition of PSN to LDPE decreased its storage modulus (G′), loss modulus (G′′) and dynamic viscosity (η′) especially at low frequency. Results of the loss tangent (tan δ) measurements indicated a tendency of forming a maximum in the low-frequency region for the samples with high PSN content. Effect of temperature on the viscosity indicated that Arrhenius-type relation with a single slope was followed by neat LDPE, while the LDPE filled with PSN followed a non-Arrhenius-type relation with multiple slopes. Differential scanning calorimeter results indicated that the blend was partially compatible. Thermogravimetric measurement results confirmed that no degradation could happen at the temperature of rheology tests. Scanning electron microscopy studies revealed that starch was uniformly distributed in the blend of LDPE and LLDPE.
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Sreekumar, P.A., Elanamugilan, M., Singha, N.K. et al. LDPE Filled with LLDPE/Starch Masterbatch: Rheology, Morphology and Thermal Analysis. Arab J Sci Eng 39, 8491–8498 (2014). https://doi.org/10.1007/s13369-014-1467-y
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DOI: https://doi.org/10.1007/s13369-014-1467-y