2005, Vol. 19

Issue (1): 8-14 DOI:

Research Articles

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四川大学高分子科学与工程学院高分子材料工程国家重点实验室

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;. . Chin J Mater Res, 2005, 19(1): 8-14.

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Abstract The immiscible poly(ethylene terephthalate) (PET)/polyethylene (PE) and polycarbonate (PC)/PE blends were examined to study the influence of high interfacial contact (pseudo--adhesion) on the tensile mechanical properties. The high interfacial contact originated from the difference in thermal contraction of the two polymers during cooling from the low processing temperature to room temperature. As a result of the pseudo-adhesion, the tensile strength and modulus of the PET/PE and PC/PE blends increase steadily with increasing PET and PC content. However, the increased values of the PC/PE blend are higher than those of the PET/PE blend at the same PET and PC concentration. The experimental values of the tensile strength for PC/PE blend are higher than those obtained from Takayanagi equation which is suitable for the blends with good interfacial adhesion. This indicates that in the absence of a compatibilizer, the interfacial interactions between the matrix and the dispersed phase can be improved by controlling the processing parameters, thus giving rise to the mechanical properties of the blending materials.

Key words: organic polymer materials blend high interfacial compressive stress morphology tensile properties

Received: 27 April 2004

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