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Citation: Tang Yong-Zheng, Tang Ye-Cang, Luo Shi-Zhong, Fu Zhong, Zhang Wen-Min. Microwave Preparation of Narrowly Distributed Surfactant-free Macromolecular Nanospheres[J]. Acta Physico-Chimica Sinica, ;1998, 14(07): 620-623. doi: 10.3866/PKU.WHXB19980709 shu

Microwave Preparation of Narrowly Distributed Surfactant-free Macromolecular Nanospheres

1.
Department of Biochemistry,Wannan Medical College,Wuhu 241001

Received Date: 28 October 1997
Available Online: 15 July 1998

The microwave preparation of narrowly distributed colloidal microlatex particles of polymethyl methacrylate (PMMA) and polystyrene (PSt) under normal ambient pressure is re-ported. There are no any surfartants in the system. The total synthesis time has been reduced from much longer time(conventional method) to less than 1 h(microwave method). The dynamic experimental results indicate that the reaction velocity of PMMA is faster than PSt, which maybe due to PMMA absorbing much more microwave radation than PSt. The particle size can be controlled by changing initial recipe. The microparticle volume is plotted versus the concentration of the added monomer at constant concentration of initiator. The linear least-square fitting convincingly shows that the number of the particles is constant. This fact also indicates that the microwave radiation favors the simultaneous nucleation and results in formation of monodisperse system.
- Microwave synthesis,
- Polymethyl methacrylate,
- Nerrowly distributed colloidal microspheres
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