Synthesis and properties of photosensitive rubbers. III. Synthesis of chloroacetylated polybutadiene and its photosensitivity

Journal Article · Wed Feb 01 04:00:00 EST 1984 · J. Appl. Polym. Sci.; (United States)

DOI:https://doi.org/10.1002/app.1984.070290204· OSTI ID:5032474

Azuma, C; Hiramatsu, T; Tanaka, H; Sanui, K; Ogata, N

Polymers having chloroacetate groups were prepared by addition reaction of various chloroacetic acids, such as mono-, di-, and trichloroacetic acids, to cis-1,4-polybutadiene under nitrogen atmosphere for obtaining photosensitive rubbers. The structure of products obtained was identified as a cyclized polybutadiene having pendent chloroacetate groups. The amount of the incorporated substituent increased up to the maximum of around 20 mol %, and the amount of the residual unsaturated groups in the polymer backbone decreased due to the cyclization of the double bond. Chloroacetylated polybutadiene had higher photocrosslinkability by UV irradiation than chloroacetylated chitosan or PVA owing to the high reactivity of the chloroacetate groups and the double bonds in the polymer. The photosensitivity depends both on the amount of the incorporated chloroacetate groups and the residual double bonds in the polymer and also depends on the glass transition temperature (T/sub g/) of the polymer, and the dependence of the crosslinking reaction on T/sub g/ was interpreted to be due to diffusion controlled reaction between excited dichloroacetate groups and olefinic groups in the polymer.

• Research Organization: Sophia Univ., Tokyo, Japan
• OSTI ID: 5032474
• Journal Information: J. Appl. Polym. Sci.; (United States), Journal Name: J. Appl. Polym. Sci.; (United States) Vol. 29:2; ISSN JAPNA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
ACETIC ACID
CARBOXYLIC ACIDS
CHEMICAL BONDS
DOUBLE BONDS
ELECTROMAGNETIC RADIATION
MONOCARBOXYLIC ACIDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PHOTOSENSITIVITY
PHYSICAL PROPERTIES
POLYMERS
RADIATIONS
SENSITIVITY
SYNTHESIS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
ULTRAVIOLET RADIATION