The characterization of latex particles prepared by pulsed electron beam induced emulsion polymerization

被引：1
|
作者：
Xu, Yongfei [1 ]
Wang, Mozhen [1 ]
Ge, Xuewu [1 ]
机构：
[1] Univ Sci & Technol China, Dept Polymer Sci & Engn, CAS Key Lab Soft Matter Chem, Hefei 230026, Anhui, Peoples R China
来源：
RADIATION PHYSICS AND CHEMISTRY | 2012年 / 81卷 / 10期
基金：
中国国家自然科学基金;
关键词：
High energy pulsed electron beam; Emulsion polymerization; Styrene; Methyl methacrylate; Porous structure; FREE-RADICAL POLYMERIZATION; FLASH-INITIATED POLYMERIZATION; INDIVIDUAL KINETIC CONSTANTS; EVALUATED RATE COEFFICIENTS; PROPAGATION; TOOL; STYRENE;
D O I：
10.1016/j.radphyschem.2012.05.001
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The emulsion polymerization of styrene (St) and methyl methacrylate (MMA) induced by 10 MeV pulsed electron beams (PEB) was investigated. The monomer conversion of MMA and St was found to be very low so that the final prepared poly(methyl methacrylate) (P(MMA)) and polystyrene (PS) latex particles exhibit porous structures, as verified by TEM and SEM observations. The results of dynamic light scattering (DLS) and gel permeation chromatography (GPC) showed that both the particle size and the molecular weight of PS and PMMA latexes decrease with the increase of the absorbed dose. However, the molecular weights and the particle sizes of the PS and PMMA latexes change differently with the irradiation time. This work indicated that emulsion polymerization induced by high energy electron beam has an advantage over that induced by gamma-ray or chemical initiators in the preparation of latex with a low molecular weight and porous structure. (c) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1634 / 1638
页数：5
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