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Dynamic mechanical properties of VAMAS polycarbonate/polyethylene blends
Author(s) -
Wippler C.
Publication year - 1990
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760301715
Subject(s) - polycarbonate , materials science , composite material , linear low density polyethylene , polyethylene , extrusion , ultimate tensile strength , polymer blend , polymer , dynamic mechanical analysis , copolymer
As part of the Versailles Project on Advanced Materials and Standards Technical Working Party on Polymer Blends, the dynamic mechanical properties of polycarbonate/linear low density polyethylene (PC/LLDPE) blends were measured. Ten laboratories participated in the round robin tests. As a whole, the inter‐laboratory agreement of data is good, particularly when results are obtained using the same apparatus (especially a Rheovibrom DDV‐III EA). The results clearly show the nonmiscibility of the parent components. The influence of frequency is also obvious but difficult to characterize because of the narrowness of the frequency range explored. The Takayanagi model applies very well for the calculation of the storage moduli as a function of composition and morphology. The most specific result is probably that of the processing orientation effect: There is no visible influence of flow orientation on dynamic tensile moduli of the parent polymers, but there is a significant difference in the moduli measured in the direction of extrusion and in the transverse direction for the blends at temperatures above 0°C. The difference is greatest for the high PE‐concentration blend.