Study of the effect of gamma irradiation on carbon black loaded low-density polyethylene films The results showed that the properties depend on dose irradiation. The changes in molecular structure of LLDPE were evaluated using melt flow index, gel fraction, differential scanning calorimetry (DSC), fourier transform infrared spectroscopy (FT-IR) and thermogravimetry analysis (TG). The polymer was irradiated with a source of 60 Co at doses of 5, 10, 20, 50 or 100 kGy at about 5 kGy s -1 rate, at room temperature. The ionizing radiation promotes chain scission and creates free radicals which can recombine, providing their annihilation, for crosslinking or branching. Polymers processed by gamma radiation have new physical-chemical and mechanical properties. The aim of this paper is to investigate of gamma irradiation effects on linear low density polyethylene (LLDPE) injected. (author)Ĭharacterization of injected linear low density polyethylene (LLDPE) irradiated by gamma-ray Samples characterization employed Thermal Analysis, Melt Flow Index, Infrared Spectroscopy and Swelling tests. Polymer samples were exposed to 5, 10, 15, 20 and 30kGy doses, at room temperature. This work aims to the study of gamma (γ) radiation interaction with low density polyethylene to evaluate changes in its physical-chemical properties. Gamma radiation is used on polymers in order to modify mechanical and physical-chemical features according to utility purposes. LDPE most common applications consist in manufacturing of laboratory materials, general containers, pipes, plastic bags, etc. LDPE has more resistance when compared to its equivalent High Density Polyethylene (HDPE). It's a semi-crystalline polymer, usually inactive at room temperature, capable to attain temperatures within a 80 deg C - 100 deg C range, without changing its physical-chemical properties. Low density polyethylene (LDPE) is obtained from ethylene gas polymerization, being one of the most commercialized polymers due to its versatility and low cost. International Nuclear Information System (INIS) Gamma irradiation effects in low density polyethylene
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |