Kinetic study on the poly(methyl methacrylate) seeded soapless emulsion polymerization of styrene. III. Seeds with crosslinking

✍ Scribed by Chia-Fen Lee; Wen-Yen Chiu

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 336 KB
• Volume: 65
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19970718)65:3<425::aid-app2>3.0.co;2-j

✦ Synopsis

In this work, a seeded soapless emulsion polymerization was carried out with crosslinking (XL) poly(methyl methacrylate) (PMMA) as seeds, styrene as monomer, and potassium persulfate (K 2 S 2 O 8 ) as initiator to synthesize the PMMA XL-PS composite latex, which we knew as the latex interpenetrating polymer network (IPN). The morphology of the latex IPN was observed by transmission electron microscopy (TEM). It showed a core-shell structure. The kinetic data from the early stages of the reaction of seeded soapless emulsion polymerization showed that the square root of polymer yield (W p ) 1/2 was proportional to the reaction time. The reaction rate decreased with the increase of crosslinking density of PMMA seeds. The core-shell model proposed in our previous work 1-2 was modified to predict the conversion of polymerization over the entire course of the synthesis of PMMA (XL) -PS composite latex. Our modified core-shell kinetic model fitted well with the experimental data.