Study of Influence of Climatic Factors of North on Properties of Polymer Composite Textolites

Abstract

Influence of a very cold climate on properties of basalt and glass textolites made by an infusion method by successively laying a reinforcing material on a mold and impregnating with a three-component epoxy binder is studied. Full-scale climatic tests at an open proving ground during 2 years led to a decrease of ultimate tensile strength by 14% and an increase of ultimate bending strength by 18% for the basalt textolite, the increase of the ultimate tensile strength by 9% and the ultimate bending strength by 22% for the glass textolite. Conducted studies of changes of surface relief showed insignificant variations of average amplitude of inhomogeneities up to 0.4 μm for the basalt textolite and up to 4 μm for the glass textolite. The conducted studies of these materials demonstrated their resistance to the climatic influences in a region of the very cold climates, which is confirmed by a high level of preservation of their strength parameters.

Evaluation of the influence of storage conditions of dispersed fillers on the properties of composites based on them

“…For experimental studies, the most common dispersed fillers in the repair of machines were chosen as objects of study: mica, boron nitride, aluminum powder, and carboncontaining powder. These fillers are widely used in the repair of machines and make it possible to provide several operational properties of PCM [12,13]. The fillers were divided into 3 groups and kept in a standard polyethylene package for 6 months under various conditions.…”

“…The quality and complex operational properties of products made from PCM based on dispersed fillers, in addition to the correct choice of PCM components and strict adherence to production technology, are largely determined by the storage conditions of raw materials (dispersed fillers). The stability of the properties of dispersed fillers largely depends on the conditions of their storage, as well as on the intensity of the impact of various factors during storage [11,12].…”