Radiation-initiated emulsion copolymerization of styrene and carboxylic acid monomers. [Gamma radiation]

Journal Article · Mon Mar 01 00:00:00 EST 1982 · J. Polym. Sci., Polym. Chem. Ed.; (United States)

DOI:https://doi.org/10.1002/pol.1982.170200322· OSTI ID:5619121

Egusa, S; Makuuchi, K

The emulsion copolymerization of styrene and carboxylic acid monomers such as acrylic, methacrylic, and itaconic acids (AAc, MAAc, IAc) was studied by using /sup 60/Co ..gamma..-rays as initiator and sodium dodecylsulfate as emulsifier. The polymerization behavior of these acid monomers was followed by simultaneous conductometric and potentiometric titrations for a latex sample taken in polymerization. The polymerization rate of these acid monomers increases in the following order of hydrophobicity: IAc < AAc < MAAc; this suggests that their polymerization sites are mainly the surface and/or subsurface regions of latex particles. The copolymerization rate of styrene and acid monomer increases with an increase in the acid monomer content for AAc and MAAc, whereas for IAc the rate decreases. The particle sizes determined by the stopped-flow method reveal that this variation of copolymerization rate cannot be explained by the number of growing particles and should be attributed to another factor; for instance, the transfer rate of styrene molecules from oil droplets to growing particles.

• Research Organization: Japan Atomic Energy Research Inst., Gunma
• OSTI ID: 5619121
• Journal Information: J. Polym. Sci., Polym. Chem. Ed.; (United States), Vol. 20:3
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
ACRYLIC ACID
CHEMICAL RADIATION EFFECTS
ITACONIC ACID
METHACRYLIC ACID
STYRENE
COMPARATIVE EVALUATIONS
COPOLYMERIZATION
EMULSIFIERS
EXPERIMENTAL DATA
LATEX
ORGANOMETALLIC COMPOUNDS
PARTICLE SIZE
POTENTIOMETRY
RADIATION DOSES
SODIUM SULFATES
ADDITIVES
ALKALI METAL COMPOUNDS
AROMATICS
CARBOXYLIC ACIDS
CHEMICAL REACTIONS
CHEMISTRY
DATA
DICARBOXYLIC ACIDS
DOSES
ELASTOMERS
HYDROCARBONS
INFORMATION
MONOCARBOXYLIC ACIDS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
POLYMERIZATION
POLYMERS
RADIATION CHEMISTRY
RADIATION EFFECTS
RUBBERS
SIZE
SODIUM COMPOUNDS
SULFATES
SULFUR COMPOUNDS
TITRATION
400600* - Radiation Chemistry