Properties of radiation cross-lined and radiation grafted polyethylenes
Radiation cross-linking and radiation graft polymerization of vinylic monomers are important methods for forming the three-dimensional structure of polyethylene (PE). Special attention should be turned to the characteristics that determine the operational possibilities of these materials, the heat resistance in particular, in studying the properties of radiation grafted (RGPE) and radiation cross-linked PE (RPE). The change in the physicochemical properties of the materials as a function of the conditions of graft polymerization and irradiation are of the greatest interest. Graft polymerization of acrylic acid (AA) to PE, which produces graft copolymers with elevated heat resistance, dyeability, and improved adhesive properties, can be conducted both in finished articles and in PE granules or powder before processing. In the last case, thermomechanical analysis (TMA) is important for optimizing the conditions of forming articles and surfaces from modified PE. The high heat resistance, which is closely correlated with the deformability in a wide temperature range, is one of the basic properties that distinguishes RPE from nonirradiated PE. The results of a study of the yield of insoluble fraction (gel fraction) characterizing the degree of interchain cross-linking, and the thermomechanical properties of RPE and graft copolymers of PE with AA as a function of both the composition are reported, and the properties of RGPE and samples of RPE of different thickness are compared in the present article. 12 refs., 2 figs., 2 tabs.
- OSTI ID:
- 175748
- Journal Information:
- Russian Journal of Applied Chemistry, Journal Name: Russian Journal of Applied Chemistry Journal Issue: 7 Vol. 64; ISSN 1070-4272; ISSN RJACEO
- Country of Publication:
- United States
- Language:
- English
Similar Records
PROCESS FOR THE PREPARATION OF GRAFT POLYMERS
MANUFACTURE OF NEW GRAFT COPOLYMERS