Effect of fullerene C60 on the structure and mechanical characteristics of polyethylene: Technological aspect

Influence of sublimation of destruction products on the pattern of DSC thermograms of polymeric materials

“…The effect of fullerene С 60 on the structure and properties of LDPE films cast from common solutions of fullerene and LDPE in one core aromatic solvents was studied in [2]. Films prepared from common solu tions of fullerene (to 10 wt %) and LDPE in bro mobenzene were studied in more detail.…”

“…3. The authors of [2] did not use TGA; however, a priori knowledge of possible endot hermic processes of sublimation of degradation prod ucts assisted in correct interpretation of the shoulder (designated as m 1 ) resulting from superposition of the endothermic sublimation of degradation products (obviously, the products of LDPE interaction with residual bromobenzene) and the endothermic melting process (with a peak at point m). It should be specially stressed that, without the indicated knowledge, such a shoulder is interpreted as the melting peak of the most defective crystals according to all thermographic laws [6].…”

“…It should be specially stressed that, without the indicated knowledge, such a shoulder is interpreted as the melting peak of the most defective crystals according to all thermographic laws [6]. The fact that this shoulder is the manifestation of the second type of false peak is confirmed by its sup pression after the introduction of fullerene (as a trap for degradation products or residual bromobenzene that form crystal solvates with fullerene [2]). …”

“…Mean while, these processes may be of certain interest for both fundamental and applied science. Our experi mental data on the topic were somewhat isolated and comprised only a small and by no means the majority of corresponding publications [1][2][3]. At the same time, the retrospective analysis of earlier results, together with the unpublished data, made it possible to take a different view of some problems of thermal analysis of polymeric materials in general and the problems of interpretation of DSC thermograms in the studies of degradation processes in particular.…”

Foreword

“…[36] Recently, he and his colleagues studied the effect of C 60 on the structure and mechanical properties of PE, PMMA, and other vinyl polymers. [37,38] Even more recently he explained the initial decrease in the density of solutions with the dissolving of C 60 and C 70 in the one-ring aromatic solvents. [39] The research results of B. M. Ginzburg are reflected in more than 300 scientific articles, with only 39 referred to earlier.…”