INTERFEROMETRIC METHOD FOR DETERMINING THE DISTRIBUTION OF GRAFT CONCENTRATION IN RADIATION-INDUCED GRAFT COPOLYMER

Journal Article · Sun Sep 01 04:00:00 EDT 1963 · J. Appl. Polymer Sci.

DOI:https://doi.org/10.1002/app.1963.070070522· OSTI ID:4666001

Matsuo, H; Iino, K; Kondo, M

Microinterferometry was applied as a quantitative method for determining the transversal distribution of graft concentration instead of the usual determination of an overall graft concentration of the radioinduced polypropylene- styrene graft copolymer. Since polystyrene has a higher refractive index than polypropylene, the features of the interference fringe provide direct visualization of the distribution curve of graft concentration. The application of the method clarified the effects of radiation dose rate, film thickness, monomer concentration, temperature, and grafting technique on the graft composition. A retardative effect on grafting appeared in the vicinity of the surface when the grafting was performed in lower radiation field and with thinner film. This was explained by the variation in the grafting rate constant as a function of monomer concentration in the film. Furthermore, the post-irradiatlon effect and accelerative effect of methanol were followed. They acted effectrvely to form the surface, volumetric, and embedded grafts. The method also proved useful in routine examination for a qualitative estimate of the graft copolymer. (auth)

• Research Organization: Nippon Telegraph and Telophone Public Corp., Tokyo
• NSA Number: NSA-17-035880
• OSTI ID: 4666001
• Journal Information: J. Appl. Polymer Sci., Journal Name: J. Appl. Polymer Sci. Vol. Vol: 7
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CHEMICAL REACTIONS
CHEMISTRY
CONFIGURATION
DIAGRAMS
FILMS
METHANOL
POLYMERS
PROPYLENE
QUANTITATIVE ANALYSIS
QUANTITY RATIO
RADIATION DOSES
RADIATION EFFECTS
REFRACTION
STYRENE
SURFACES
TEMPERATURE
THICKNESS
VELOCITY