Low Temperature, In Situ Polymerization of Vinyl Acetate in Silica Containing Emulsion Gels

被引：0
|
作者：
Zavahir, Nazreen [1 ]
Zhang, Tan [2 ,3 ]
Blum, Frank D. [4 ]
Maddumaarachchi, Madhubhashini [5 ]
机构：
[1] Univ Sri Jayewardenepura, Dept Chem, Nugegoda, Sri Lanka
[2] Duke Kunshan Univ, Div Nat & Appl Sci, Kunshan 215316, Jiangsu, Peoples R China
[3] Duke Kunshan Univ, Environm Res Ctr, Kunshan 215316, Jiangsu, Peoples R China
[4] Oklahoma State Univ, Dept Chem, Stillwater, OK 74078 USA
[5] Univ Sri Jayewardenepura, Dept Polymer Sci, Nugegoda, Sri Lanka
来源：
ADVANCES IN POLYMER TECHNOLOGY | 2023年 / 2023卷
关键词：
FREE-RADICAL POLYMERIZATION; METHYL-METHACRYLATE; POLY(VINYL ACETATE); THERMAL-DECOMPOSITION; DEGRADATION; STYRENE; BULK; KINETICS;
D O I：
10.1155/2023/7849372
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Vinyl acetate (VAc) was polymerized to about 90% conversion in 9 h at 40? from the colloidal microstructure of the VAc/fumed silica/cetyltrimethylammonium bromide (CTAB) system. The glass transition (T-g) of poly(vinyl acetate) (PVAc) polymerized in these emulsion gels with silica was higher (T-g=41?) than those of PVAc made from bulk polymerization at 60? (T-g=31?) and the weight average molar mass (M-w) was also larger (M-w about 300 kg/mol) than those from bulk polymerization (M-w=125 kg/mol). Increased M-w, T-g, and lowered processing temperature for these composites could facilitate new applications for PVAc.
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页数：10
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