Citation: Wei Deng, Hua-Chao Guo, Wei-Li Yu, Cheng-You Kan. Effects of Shell Composition, Dosage and Alkali Type on the Morphology of Polymer Hollow Microspheres[J]. Chinese Journal of Polymer Science, ;2018, 36(1): 43-48. doi: 10.1007/s10118-018-2012-3 shu

Effects of Shell Composition, Dosage and Alkali Type on the Morphology of Polymer Hollow Microspheres

Wei Deng ^a,, ,
Hua-Chao Guo ^a ,
Wei-Li Yu ^a ,
Cheng-You Kan ^b,,

a.
Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, School of Material Science and Engineering, Harbin University of Science and Technology, Harbin 150080, China
b.
Department of Chemical Engineering, Key Laboratory of Advanced Materials of Ministry of Education, Tsinghua University, Beijing 100084, China

Corresponding author: Wei Deng, weideng@hrbust.edu.cn Cheng-You Kan, kancy@tsinghua.edu.cn
Received Date: 11 May 2017
Revised Date: 15 July 2017
Accepted Date: 15 July 2017
Available Online: 8 October 2017

Polymer hollow microspheres were prepared by performing alkali treatment on the multilayer core/shell polymer latex particles containing carboxyl groups. Effects of the shell composition and dosage as well as alkali type on the morphology of the microspheres were investigated. Results showed that in comparison with acrylonitrile (AN) and methacrylic acid (MAA), using butyl acrylate (BA) as the shell co-monomer decreased the glass transition temperature (T_g) of shell effectively and was beneficial to the formation of uniform and big hollow structure. Along with the increase of the shell dosage, the alkali-treated microspheres sequentially presented porous and hollow morphology, and the size of microspheres increased, while the hollow diameter increased first and then decreased, and the maximum hollow ratio reached 39.5%. Furthermore, the multilayer core/shell microspheres had better tolerance to NH₃·H₂O than to NaOH. When the molar ratio of alkali to methacrylic acid (MR_alkali/acid) for NaOH ranged from 1.15 to 1.30 or MR_alkali/acid for NH₃·H₂O ranged from 1.30 to 2.00, the regular polymer hollow microspheres could be obtained.
- Hollow microspheres,
- Core-Shell polymer,
- Alkali treatment,
- Morphology
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