Temperature Dependence of the Heat Capacity of Polymeric Compositions Based on Polyethylene (LDPE) with a Metal Oxide Filler

Abdusalam Vaxitovich Umarov,Haqberdi Eshmirzayevich Khamzaev,Bahodir Abdusamatovich Mirsalikhov

doi:10.11648/j.ajmie.20200501.11

Abdusalam Vaxitovich Umarov, Haqberdi Eshmirzayevich Khamzaev + Show 1 more

Open Access

https://doi.org/10.11648/j.ajmie.20200501.11

Copy DOI

Abstract

The temperature dependence of the heat capacity of polymer compositions based on polyethylene filled with copper nanoparticles was studied. Based on the analysis of the data obtained, a conclusion is made about structural rearrangements. A study of the thermal conductivity of the obtained polymer compositions with nanoscale fillers shows that various components of the filler have a significant effect on the thermal conductivity of the compositions, which is due to the ability of structure formation during their formation. Measurements of the temperature dependence of thermal conductivity and heat capacity indicate the presence of visible structural rearrangements in polymer compositions with metal oxide fillers. There are various methods in which constant temperature transitions of electrical conductivity, thermal conductivity and heat capacity are detected. e. structural restructuring of defective states of polymer compositions. It was found that the transition temperature depends on the degree of filling and crystallinity of the samples.

Highlights

It should be noted that the studies of thermophysical properties while filling with different % of filler (Cu, CdS) show that in the presence of Cu a smaller and homogeneous spherulite structure is formed than in the initial PE, indicating that Cu particles are effective nuclei of structure formation
It is known that in the field of thawing the molecular mobility of individual elements of the dynamic structure of polymer compositions, the change occurs on temperature coefficient of the studied characteristics - heat capacity and thermal conductivity, which is expressed as jumps on the temperature dependence curve
Given the quasi-one-dimensional structure of polymer chains and intermolecular interaction in close proximity of the nearest neighbors, the low-temperature heat capacity of polymer compositions can be described in terms of the Stockmeyer-Hecht model [1]

Summary

Introduction

It should be noted that the studies of thermophysical properties while filling with different % of filler (Cu, CdS) show that in the presence of Cu a smaller and homogeneous spherulite structure is formed than in the initial PE, indicating that Cu particles are effective nuclei of structure formation. Based on Polyethylene (LDPE) with a Metal Oxide Filler characterized by a temperature range in which the polymer in the form of a product retains the necessary mechanical strength and performance.

Results

Conclusion