Effect of single-step chlorosulfonation of HDPE on its thermal properties in a sealed pressure reactor

The preparation and thermodynamic behaviors of chlorosulfonated polyethylene

“…On the TGA curves of CSM, the slight weight loss between 170°C and 240°C were mainly caused by the dehydrochlorination of CSM, which was similar with the decomposition of PVC 12, 13. The distant weight loss around 285°C were mainly associated with the degradation of dehydrochlorinated residues and the splitting‐off SO 2 Cl groups of CSM 9. The second step weight loss beginning at 450°C was attributed to the decomposition of the main chain of CSM,9 which was accordant with the decomposition temperature of main chain of LLPE.…”

“…The thermal properties of the modified PE by chlorination and chlorosulfonation have been widely studied by TGA instruments 8–11. In this work, the thermal behaviors of CSM with different chlorine and sulfur content were carried out by TGA.…”

Radical Chlorination of Polyethylene and Molecular Structure Characterization of Reaction Products

“…The absorption peaks appeared at 717 and 1465 cm À1 are assigned to the bending modes of CH 2 atoms where the peak appeared at the region of 2850-2950 cm À1 is assigned to the C-H stretching mode. [16][17][18][19] Figure 3 illustrates the absorption spectrum of a CPE's sample containing of 13.5% chlorine. In this spectrum besides of CH 2 absorptions peaks, the C-Cl stretching and bending modes have been detected by two separated sharp peaks at about 617 and 1267 cm À1 respectively.…”

“…The absorption vibrations that have been appeared at the region of 800-1100 cm À1 are due to the C-C bonds, which resulted from increasing the dipole moments of polymeric chain by formation of C-Cl bonds. [16][17][18][19][20][21][22] In Figure 4 the FT-IR spectra of CPE's samples having 25 to 55% chlorine have been shown. It can be observed that as the reaction proceeds and the number of substituted chlorine atoms along the polymeric back bone increases, the stretching and bending modes of C-Cl bonds and the vibrations of C-C bonds become stronger.…”

“…These articles have been presented either to interpret the appeared peaks in the IR spectra, or to elucidate the distributions of chlorine atoms on the polymeric chains, for instance distinguishing of random or blocky regions. [16][17][18][19][20][21][22] Another aspect of these studies is the qualitative characterization of chlorine atoms and providing a supporting evidence y To whom correspondence should be addressed (Tel: +98-21-6005819, Fax: +98-21-6022853, E-mail: ramazani@sharif.edu).…”