Thermal degradation of polystyrene, poly(1,4-butadiene) and copolymers of styrene and 1,4-butadiene irradiated under air or argon with 60Co-γ-rays

Abstract

This paper is NOT THE PUBLISHED VERSION; but the author's final, peer-reviewed manuscript. The published version may be accessed by following the link in the citation below.

Thermal decomposition of cross-linked polybutadiene and its copolymers

“…The gel content and swelling ratio [2], [3], [4] were determined as previously described [1] . Gel content is determined by heating a sample of known mass in a solvent for 24 h. The recovered insoluble sample is then thoroughly dried at elevated temperatures under vacuum and the mass of insoluble polymer is determined.…”

“…In previous work from these laboratories [1] , it has been shown that 60 Co-γ-ray irradiation will effect cross-linking of polybutadiene, PBD, but polystyrene, PS, can be cross-linked by irradiation only in the presence of oxygen. The thermal stability of 60 Co-γ-ray-irradiated PBD is lower than that of unirradiated polymer while irradiated PS has enhanced thermal stability relative to the virgin polymer.…”

“…Polybutadiene actually undergoes cross-linking in the process of thermogravimetric analysis in an inert atmosphere and the cross-link density depends on the temperature and the time [1] . When a sample is heated to 400°C, the cross-linking density is quite high.…”

Electrocoagulation (Ec) of Styrene Butadiene Rubber from Aqueous Solution using different Electrodes

“…Some properties of SBR such as abrasive resistance, heat resistance, and aging resistance are superior to those of NR, and thus SBR has replaced NR partially in many fields. However, due to the instability of double bonds in SBR to ultraviolet, heat, and oxygen, aging processes like chain scission, chain crossing, and oxidization take place easily when the SBR products are in use just like other styrene-butadiene copolymers [9][10][11][12][13][14][15][16].…”

Thermal and mechanical properties of polystyrene modified with esters derivatives of 3-phenylprop-2-en-1-ol

“…[1][2][3]. On the contrary, styrene easily copolymerizes with different monomers such as acrylonitrile, methacrylamide, divinylbenzene, butadiene, maleic anhydride, vinyl chloride, esters of organic acids, e.g., acrylates or methacrylates, unsaturated polyesters or others creating polymeric materials with unique properties suitable for many industrial applications [4][5][6][7][8][9][10][11][12][13][14].…”