INFLUENCE OF
SOAKING ON GIVEN PHYSICAL PROPERTIES AND STRUCTURE OF PA/PP MIXTURES
Technical
University of Czestochowa, Department of Polymer Processing and Production
Management, Czestochowa, Poland
ABSTRACT
Investigation
results for mixtures of polyamide 6 (Tarnamid T-27) with polypropylene (Malen P
J 400) have been presented. Mixtures with content of 30, 50, and 70% of
polyamide in relation to the polypropylene with compatibilization agent
(Polibond 3150) in a quantity of 2% have been produced.
Vicat
softening temperature, heat deflection temperature (HDT) under load, melt flow
index and absorptivity of water have been researched as well as mechanical
properties, such as tensile strength, Young’s modulus, hardness and impact
strength according to Charpy have been tested. Investigations of
crystallization degree by means of X-ray radiographic method as well as
investigations of the structure using scanning microscope have been conducted.
Investigations
have been conducted for the mixtures before as well as after soaking.
It
has been found that increase in content of polyamide in the mixture usually
results in an increase in researched properties of PA/PP mixtures. Heat
treatment, i.e. soaking, causes an increase in the Vicat softening temperature,
heat deflection temperature under load, melt flow index and has a significant
influence on mechanical properties of the mixture. These properties mostly
increase, with the exception of those for impact strength.
Keywords: mixtures, mechanical / heat
properties, soaking, crystallization, structure