Citation: Zhao-Sheng Hou, Cheng-You Kan. Preparation and properties of thermoexpandable polymeric microspheres[J]. Chinese Chemical Letters, ;2014, 25(9): 1279-1281. doi: 10.1016/j.cclet.2014.04.011 shu

Preparation and properties of thermoexpandable polymeric microspheres

Zhao-Sheng Hou ^a,, ,
Cheng-You Kan ^b

1.
a College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Ji’nan 250014, China;
2.
b Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

Corresponding author: Zhao-Sheng Hou,
Received Date: 7 February 2014
Available Online: 3 April 2014
Fund Project:

In this paper, thermoexpandable polymeric microspheres were prepared by suspension polymerization with acrylonitrile (AN) and methyl methacrylate (MMA) as monomers and i-butane as a blowing agent. The micromorphology and thermal stability were researched by polarized microscopy and TGA. The diameter of the expandable microspheres increased from about 20 μm (unexpanded) to 40-80 μm (expanded) upon heating. The maximum expansion volume was higher than 22 times of the original volume and the density of the expanded microspheres was about 16.7 kg/m3. The blowing agent content in microspheres was about 20 wt% and T_o.e., T_m.e. and T_o.s. were 80 ℃, 120-130℃ and 140-145 ℃, respectively.
- Expandable microspheres,
- Suspension polymerization,
- Methyl methacrylate,
- Properties
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