Fabrication and morphological evolution of inverse core/shell structural latex particles of poly(vinyl acetate)/polystyrene by maleic anhydride grafting

被引:8
|
作者
Zhang, Xiao [1 ]
Bai, Long [1 ]
Lou, Chunhua [2 ]
Chen, Xiujuan [1 ]
Jia, Zhao [1 ]
Gu, Jiyou [1 ]
Li, Zhiguo [1 ]
机构
[1] Northeast Forestry Univ, Coll Mat Sci & Engn, Key Lab Biobased Mat Sci & Technol, Harbin 150040, Peoples R China
[2] Qiqihar Univ, Coll Mat Sci & Engn, Qiqihar 161006, Peoples R China
基金
中国国家自然科学基金;
关键词
Poly(vinyl acetate)/polystyrene; Inverse core/shell; Maleic anhydride; Grafting; Morphology; MONOMER REACTIVITY RATIOS; CORE-SHELL PARTICLES; FREE-RADICAL COPOLYMERIZATION; EMULSION POLYMERIZATION; ACETATE) SHELLS; NANOPARTICLES; POLYSTYRENE; SURFACE; ACRYLATE; LATICES;
D O I
10.1007/s00396-016-3870-2
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
In order to overcome the large differences in reactivity ratio and hydrophilicity between vinyl acetate (VAc) monomer and styrene (St) monomer and synthesize a stable poly(vinyl acetate)/polystyrene (PVAc/PS) inverse core/shell (ICS) structural emulsion, this paper presented a novel method to prepare PVAc/PS ICS structural latex particles. Maleic anhydride (MA) grafting, for the first time, was introduced to fabricate the ICS latex particles, where VAc monomer was used as the core monomer and St monomer as the shell monomer. By adjusting the core/shell (CS) ratio and MA content, the morphology of the particles could be controlled to have a regular evolution from strawberry-like to semi-wrapped and final ball-like. In addition, upon MA content exceeding 1 % (percentage of the total monomer), the secondary nucleation almost disappeared gradually. The resulting ICS particles had an average diameter approximately 330 nm and a controllable distribution. Further results of characterization such as phase separation structure, existence of thin transition layer, and special morphological feature of latex particle also demonstrated that this ICS structure had been fabricated successfully. The mechanism of formation was displayed as well.
引用
收藏
页码:1117 / 1128
页数:12
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