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Synthesis, characterization, and swelling behavior of poly(N‐hydroxymethylacrylamide) grafted poly(vinyl alcohol)
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-01-20 , DOI: 10.1002/app.49014
Fatma Kurşun 1 , Nuran Işıklan 2
Affiliation  

In this study, the graft copolymerization of N ‐hydroxymethylacrylamide (NHMAAm) with poly(vinyl alcohol) (PVA) was carried out by using potassium persulfate/N ,N ,N ,N ‐tetramethylethylenediamine (K2S2O8) to improve physicochemical properties and functionality of PVA. The structures of PVA‐g ‐poly‐NHMAAm (PNHMAAm) copolymers were characterized by Fourier transform infrared, elemental analysis, nuclear magnetic resonance (1H‐NMR), 13C‐NMR, and size exclusion chromatography. Their thermal behaviors were investigated by differential scanning calorimetry and thermogravimetric analysis (TGA). The TGA results indicated that the graft copolymers show better thermal stability then PVA. The effects of reaction time, temperature, NHMAAm, and K2S2O8 concentrations on grafting parameters were examined. The maximum grafting yield (34.01%) was provided when reaction was carried out under optimum conditions (time = 2 hr, T = 40°C, [NHMAAm] = 0.25 M, [K2S2O8] = 4.56 × 10−3 M). Moreover, PVA‐g ‐PNHMAAm membranes were prepared and their swelling behaviors were studied. The results demonstrated that swelling degree of graft membranes increased almost 3.5‐fold compared to PVA membrane.

中文翻译:

聚(N-羟甲基丙烯酰胺)接枝的聚乙烯醇的合成,表征和溶胀行为

在这项研究中,通过使用过硫酸钾/ NNNN-四甲基乙二胺(K 2 S 2 O 8)进行N-羟甲基丙烯酰胺(NHMAAm)与聚乙烯醇(PVA)的接枝共聚PVA的理化性质和功能。PVA - g -poly-NHMAAm(PNHMAAm)共聚物的结构通过傅立叶红外光谱,元素分析,核磁共振(1 H-NMR),13进行表征C-NMR和尺寸排阻色谱。通过差示扫描量热法和热重分析(TGA)研究了它们的热行为。TGA结果表明,接枝共聚物的热稳定性优于PVA。研究了反应时间,温度,NHMAAm和K 2 S 2 O 8浓度对接枝参数的影响。在最佳条件下(时间= 2小时,T = 40°C,[NHMAAm] = 0.25 M,[K 2 S 2 O 8 ] = 4.56×10- )进行反应时,可获得最大接枝产率(34.01%)。 3 M)。此外,PVA- g‐PNHMAAm膜已制备并研究了其溶胀行为。结果表明,与PVA膜相比,移植膜的膨胀度提高了近3.5倍。
更新日期:2020-01-20
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