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Correlations between composition and crystallinity of LDPE/HDPE blends

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Abstract

DMTA, DSC, WAXS and density were used to quantify the crystallinity and crystallite dimensions of specific grades of LDPE/HDPE blends. In virtue of the close agreement of the results obtained with the three techniques, an average degree of crystallinity was calculated, allowing the establishment of quantitative relationships between composition and crystallinity, and shifting of the α-relaxation. Dimensions along the 110 and 200 planes were also correlated with shifting of the α-transition.

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Acknowledgements

Authors would like to acknowledge Prof. Maria Teresa Bruno for the important contribution in NMR analyses of the polyethylenes. We also thank CAPES, CNPq, UFPR, COPEL and LACTEC, for financial support.

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Authors and Affiliations

  1. Instituto de Tecnologia para o Desenvolvimento LACTEC, C. P. 19067, CEP 81531-990, Curitiba, PR, Brazil

    Marilda Munaro

  2. Departamento de Química, Universidade Federal do Paraná, C.P. 19081-990, CEP 81531-990, Curitiba, PR, Brazil

    Leni Akcelrud

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  1. Marilda Munaro
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  2. Leni Akcelrud
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Correspondence to Leni Akcelrud.

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Munaro, M., Akcelrud, L. Correlations between composition and crystallinity of LDPE/HDPE blends. J Polym Res 15, 83–88 (2008). https://doi.org/10.1007/s10965-007-9146-2

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  • DOI: https://doi.org/10.1007/s10965-007-9146-2

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