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Polymerization of MMA in polyHIPEs by RATRP
writer:F M Sun, W F Xu, M S Chen, F A Zhang
keywords:PolyHIPE, RATRP, Methyl methacrylate, Confined space
specific source:J Polym Res
Issue time:2014年
A series of polymerized high internal phase emulsions
(polyHIPEs) with different cavities and windows
(named PSD) were used as microreactors. Then methyl methacrylate
(MMA) was polymerized in the spaces of the
polyHIPE by reverse atom transfer radical polymerization
(RATRP). The resulting materials and PMMA in the
polyHIPEs were characterized by scanning electron microscopy,
gel permeation chromatography, Fourier transform infrared
spectroscopy, thermogravimetry, hydrogen nuclear
magnetic resonance and differential scanning calorimetry.
The results suggest that the monomer MMA is polymerized
in the PSDs by RATRP. The confinement effect of the different
cavities and pores is obvious but it weakens with the
increase of the pore size. Compared with the conventional
PMMA by RATRP, the number-average molecular weight
and temperature of the initial decomposition of the PMMA
obtained from PSDs is significantly high, which suggests that
the confined space in the PSDs plays an active role in RATRP.