Prediction of tensile modulus of semicrystalline polymers from a single melting curve recorded by calorimetry
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This work introduces an easy calculation method, which results in the elastic modulus of semicrystalline polymers from data obtained from a single melting curve recorded by calorimetry. It is well known that the mechanical properties of semicrystalline polymers depend on the crystalline structure; however, the number of direct correlations between crystalline structure and mechanical properties is limited. The melting and crystallization of the polymers studied in this work were measured using calorimetry; the mechanical properties were estimated by tensile tests on the standard shape specimens. Good agreement was found between the calculated and measured modulus values, indicating that the correlation is reliable. In addition, the method was tested for polypropylene and polyamide-6 which proves clearly that the correlation reported here is generally valid for semicrystalline polymers.
KeywordsTensile modulus Crystalline structure Melting curve Prediction
This work was supported by the ÚNKP-17-4-III and ÚNKP-17-3-I New National Excellence Program of the Ministry of Human Capacities. The authors would like to acknowledge the MOL Petrochemicals for the special set of iPP samples.
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