聚合
小角X射线散射
聚(N-异丙基丙烯酰胺)
傅里叶变换红外光谱
化学工程
剥脱关节
化学
氧化还原
材料科学
高分子化学
散射
纳米技术
无机化学
有机化学
聚合物
共聚物
光学
物理
工程类
石墨烯
作者
Beata Strachota,Alexander Zhigunov,Rafał Konefał,Jiří Spěváček,Jiřı́ Dybal,R. Puffr
出处
期刊:Soft Matter
[The Royal Society of Chemistry]
日期:2015-01-01
卷期号:11 (48): 9291-9306
被引量:58
摘要
The formation of the hydrogel poly(N-isopropylacrylamide)-clay (LAPONITE®) by redox polymerization was investigated, and the main factors governing the gel build-up were determined. The significant effect of the redox initiating system ammonium peroxodisulfate (APS) and tetramethylethylenediamine (TEMED) on gel formation and structure was established, making it possible to control the structure of the gel. Moreover, the pre-reaction stage involving the quality of the clay exfoliation in an aqueous suspension and the interaction of reaction components with the clay play a role in controlling the polymerization and gel structure. The molecular and phase structure evolution during polymerization was followed in situ by the following independent techniques: Fourier transform infrared spectroscopy (FTIR), chemorheology, small-angle X-ray scattering (SAXS) and ultraviolet-visible spectroscopy (UV/Vis). The combination of these methods enabled us to describe in detail particular progress stages during the gel formation and determine the correlation of the corresponding processes on a time and conversion scale. The mechanism of gel formation was refined based on these experimental results.
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