Surface modification of polyethylene by radiation-induced grafting for adhesive bonding. III. Oxidative degradation and stabilization of grafted layer

Journal Article · Fri Sep 01 04:00:00 EDT 1978 · J. Appl. Polym. Sci.; (United States)

DOI:https://doi.org/10.1002/app.1978.070220906· OSTI ID:6428542

Yamakawa, S; Yamamoto, F

Vapor-phase mutual grafting of methyl acrylate (MA) onto polyethylene (PE) and subsequent saponification treatment produce a surface graft having a high adhesive bondability, which results from the presence of a hydrolized homopolymer layer (consisting of only monomer componenet) on an inner graft copolymer layer consisting of both PE and monomer components. The oxidative deterioration and the stabilization of the grated surface layer have been investigated to clarify the long-term stability of the adhesive bondability. The bondability rapidly disappears with accelerated weatherly followed by acetone extraction treatment, whereas it is kept unchanged during thermal-oxidative aging at 100/sup 0/C. Microscopic and attenuated total resonance (ATR) infrared spectroscopic observations of the degreaded surfaces show that the bondability loss is due to degradiative removal of the surface homopolymer layer. The addition of combinations of conventional antioxidants and ultraviolet absorbers stabilizes the grafted surface layer against thermal-oxidative and photo-oxidative degradation and thus extends the bondability rentention time. The stabilization is more effective in the grafts of carbon black-containing PE, where carbon black is present in the inner-graft copolymer layer.

• Research Organization: Nippon Telegraph and Telephone Public Corp., Ibaraki, Japan
• OSTI ID: 6428542
• Journal Information: J. Appl. Polym. Sci.; (United States), Journal Name: J. Appl. Polym. Sci.; (United States) Vol. 22:9; ISSN JAPNA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ACRYLATES
ADHESIVES
CARBOXYLIC ACID SALTS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
ELECTROMAGNETIC RADIATION
GAMMA RADIATION
GRAFT POLYMERS
IONIZING RADIATIONS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDATION
POLYETHYLENES
POLYMERS
POLYOLEFINS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS