Synthesis and characterization of hollow polymer latex particles

✍ Scribed by Xiang-Zheng Kong; Cheng-You Kan; Hui-Hui Li; Dai-Qing Yu; Qing Yuan

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 207 KB
• Volume: 8
• Category: Article
• ISSN: 1042-7147
• DOI: 10.1002/(sici)1099-1581(199711)8:11<627::aid-pat690>3.0.co;2-6

✦ Synopsis

Latex particles with a multihollow structure were prepared by seeded emulsion polymerizatoin. Thus seed latexes Sn, consisting of styrene(St) and methyl methacrylate (MMA) copolymer, and Sa, consisting of St-MMA-AA (acrylic acid) copolymers, were first prepared, then a series of coreshell composite latexes SnCa, SnCn, SaCa and SaCn were synthesized with or without AA in the absence of emulsifiers in the second step. Final latexes were then treated by alkali and acid subsequently at 90°C for 3 h. TEM observation showed that only SnCa and SaCa (prepared with AA in the second polymerization, suffix "a" means with AA, "n" means without AA) produced multihollow structures in the particles, and their particle volumes increased 42% for SnCa and 23% for SaCa after the treatment in comparison with original latex particles. No hollows were observed for SnCn and SaCn particles prepared without AA and new particles were formed for the SaCn latex in the second step polymerization.