Influence of the nanoparticle type on the thermal decomposition of the green starch/poly(vinyl alcohol)/montmorillonite nanocomposites

被引:34
作者
Nistor, Manuela-Tatiana [1 ]
Vasile, Cornelia [1 ]
机构
[1] Petru Poni Inst Macromol Chem, Dept Phys Chem Polymers, Iasi 700487, Romania
关键词
Nanocomposites; Decomposition; Mechanism; TG; FT-IR; MS; DEGRADATION BEHAVIOR; POLYMER/MONTMORILLONITE NANOCOMPOSITES; STARCH; CLAY; POLYMER; MORPHOLOGY; BLENDS; COMPOSITE; HYBRID; FIRE;
D O I
10.1007/s10973-012-2731-6
中图分类号
O414.1 [热力学];
学科分类号
摘要
In this study, some aspects concerning the thermal decomposition of starch/poly(vinyl alcohol) (PVA)/montmorillonite (MMT) nanocomposites with 2 wt% nanoclay, prepared by melt mixing method, were studied. For these loadings, the inorganic fillers are well dispersed through the PVA/starch matrix, i.e., the nanocomposites formed are mostly intercalated hybrids. The aim of this article is to establish the effect of the nanofiller nature on the thermal decomposition of the starch/PVA/MMT nanocomposites. The thermal behavior of the 50 wt% starch/50 wt% PVA blend and its nanocomposites with 2 wt% nanoclay has been investigated by thermogravimetric analysis coupled with Fourier transform-infrared spectroscopy and mass spectrometry (MS). The volatile compounds resulting during the thermal degradation were studied by in situ vapor phase FT-IR spectroscopy and MS technique under a controlled temperature/time program. Apart from the identification of the volatile compounds, some conclusions on the nanoclays effect on the degradation mechanism and formation of the volatile compounds in accordance with the previously developed general mechanisms for PVA and starch degradation have been formulated. The clay-PVA/starch nanocomposites show completely different degradation product distribution patterns, which may be attributed to the presence of the head-to-head structures and Si-O-C linkages formed between clay and blend components.
引用
收藏
页码:1903 / 1919
页数:17
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