ポリプロピレンの溶接性および接着性に及ぼす放射線照射の影響

概要

論文の詳細を見る
This paper describes the irradiation effects on the tensile characteristics of welded polypropylene and on the adhesiveness of this material. Polypropylene plates of 2 mm in thickness were butt welded by using a semiautomatic heating plate welder and exposed to various irradiation doses of neutron. Tensile characteristics of these specimens were examined and measurements of melting point, dissolution rate and molecular weight were made. Examination of X-ray diffraction patterns was also made during tensile tests on neutron-irradiated specimens. Furthermore, the adhesive strength, infrared spectra and surface appearance of neutron-irradiated specimens were examined, and the irradiation effect on the adhesiveness of this materials was also discussed. The results obtained were summarized as follows; (1) The irradiation effects for the welded part are similar to those for the base material of polypropylene, that is, tensile strength decreases with excessive irradiation and brittleness becomes greater with an increase of irradiation dose. (2) The irradiation effects on the melting point, dissolution rate, molecular weight and molecular orientation tendency are correlative with those on the tensile characteristics of neutron-irradiated materials. (3) The adhesive strength of polypropylene increases with irradiation of neutron, This increase seems to be caused by polarization due to irradiation.
社団法人日本材料学会の論文
1979-01-15