Published Paper Details:

In order to investigate the dynamical behaviour of a semi-crystalline polymer was studied at low temperatures by calculating the total lattice thermal conductivities of four samples of polyethylene with 0.43 , 0.56 0.71 and 0.81 different degrees of crystalline and temperatures between 2 K and 10 K. The contributions of the crystalline and non crystalline natures and their percentage contributions were taken into account can be visualised with the fact that has been able to interpret numerous and largely divergent physical properties of semi-crystalline polymer .At low temperature the temperature reliance of cross section warm conductivity of semi-crystalline polymer. In a semi-crystalline polymer, phonons are dispersed by a mix of two procedures .In this treatment the lattice thermal conductivity of polyethylene was in excellent quantitative agreement with the experimental data and showed a strong crystallinity dependence, with a distinctive cross-over point at about 2 K. As the temperature builds, this conductivity expands all the more gradually, and somewhere in the range of 2k and 10 K, it turns out to be practically free of temperature (level area). The cross section warm conductivity again increments at high temperatures .