Photo- and Bio-Degradation Processes in Polyethylene, Cellulose and their Blends Studied by ATR-FTIR and Raman Spectroscopies

Ołdak, Dagmara; Kaczmarek, Halina; Buffeteau, Thierry; Sourisseau, C.

doi:10.1007/s10853-005-2821-y

Cited by 79 publications

(44 citation statements)

References 38 publications

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“…There were strong absorption bands at 2906 and 2840 cm -1 , which were attributed to the alkane CH stretching vibrations of the methylene groups of LDPE (Naranjo et al 2013;Xu et al 2006). The next strong absorption band was observed at around 1465 cm -1 (3) attributed to the shearing activities of methyl and methylene and CH2 bending deformation (Xu et al 2006;Oldak et al 2005). The band observed at 720 cm -1 (4) was referred to the C-H bending of characteristic LDPE crystal and rocking deformation (Xu et al 2006;Oldak et al 2005;Silverstein et al 1974).…”

Section: Ft-ir Atr Evaluations Evaluation Of Tp Panels and Layersmentioning

confidence: 99%

Degradation Behavior and Accelerated Weathering of Composite Boards Produced from Waste Tetra Pak® Packaging Materials

et al. 2014

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Manufacturing panels from Tetra Pak ® (TP) packaging material might be an alternative to conventional wood-based panels. This study evaluated some chemical and physical properties as well as biological, weathering, and fire performance of panels with and without zinc borate (ZnB) by using shredded TP packaging cartons. Such packaging material, a worldwide well-known multilayer beverage packaging system, is composed of cellulose, low-density polyethylene (LDPE), and aluminum (Al). Panels produced from waste TP packaging material were also examined by FT-IR to understand the fungal deterioration and extent of degradation after accelerated weathering. Before FT-IR investigations, panel specimens were ground under nitrogen atmosphere due to nonuniformity of the composite material. The FT-IR results showed that fungal degradation occurred in the natural polymer of the panel matrix. Although the natural polymer is mostly composed of cellulose, there were also small amounts of polyoses and lignin. It was seen that especially polyose and lignin bands in FT-IR spectra were affected more than cellulose bands by fungal attack. No changes were observed by the fungi in the plastic component (LDPE) of the matrix; however, LDPE seemed more sensitive to weathering than cellulose. Incorporation of ZnB at loading level of 1% (w/w) did not contribute fire performance of the panels when compared to control panel specimens, while a loading level of 10% improved fire performance considering test parameters such as mass loss, ignition time and peak heat release rate.

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Section: Ft-ir Atr Evaluations Evaluation Of Tp Panels and Layersmentioning

confidence: 99%

Degradation Behavior and Accelerated Weathering of Composite Boards Produced from Waste Tetra Pak® Packaging Materials

et al. 2014

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“…FT-Raman band assignments for hardwoods can be summarized as follows: (EVANS, 1991;KENTON;RUBINOVITZ, 1990;OLDAK et al, 2005), the peak at 2907 cm −1 corresponds with cellulose and hemicellulose, and the shoulder at 2939 cm −1 relates to the presence of extractives and hemicellulose (Figure 10). The expected very intense peak with a shoulder at 1600 and 1660 cm −1 ONA et al, 1997) are attributed to lignin.…”

Section: Raman Analysismentioning

confidence: 99%

Physical, Morphological Properties and Raman Spectroscopy of Chestnut Blight Diseased Castanea Sativa Mill. Wood

Gündüz

Oral

Akyüz

et al. 2016

CERNE

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ABSTRACT:In this study, some of the physical and anatomical properties of Chestnut Blight Diseased (CBD) wood were investigated, and the study also included observations using Raman spectroscopy. The objective of these investigations was to determine the extent of the damage that is done to the wood of the diseased chestnut trees, which must be removed from the forest and used in the manufacture of industrial products. It was indicated that most of the adverse effects of the disease were in the vascular cambium. There was a clear indication of deterioration of the wood in the last growth ring next to vascular cambium. In the diseased secondary xylem region next to vascular cambium; vessel diameter, vessel frequency and vessel element length had a decrease, and vessel and other cells were irregular compared to healthy wood. Spores were detected and identified as Cryphonectria parasitica (Murrill). Annual ring properties (annual growth ring width, latewood percentage, etc.) were similar in diseased wood compared to healthy wood. The Raman spectroscopy results showed no significant changes in the structure of the cell wall or its components. After removing the diseased parts, unlimited usage of formerly wood is possible. Heat treatment of the wood is suggested before use in the interest of sanitation and dimensional stability. PROPRIEDADES FÍSICAS E MORFOLÓGICAS E ESPECTROSCOPIA RAMAN DE MADEIRA DE CASTANEA SATIVA MILL. AFETADA PELO CANCRO DO CASTANHEIRORESUMO: Neste estudo, algumas das propriedades físicas e anatômicas de madeira afetada pelo cancro do castanheiro (CBD) foram investigadas, e o estudo também incluiu observações usando espectroscopia Raman. O objetivo destas investigações foi determinar a dimensão do dano que é causado na madeira dos castanheiros doentes, que devem ser removidos da floresta e utilizados na fabricação de produtos industriais. Foi avaliado que a maioria dos efeitos adversos da doença esta localizado no câmbio vascular. Há uma clara indicação de deterioração da madeira no último anel de crescimento junto ao câmbio vascular. Na região doente do xilema secundário ao lado do câmbio vascular o diâmetro, frequência e comprimento do vaso eram menores, e os vasos e outras células eram irregulares comparados à madeira saudável. Esporos foram detectados e identificados como Cryphonectria parasitica (Murrill). Propriedades dos anéis anuais (largura de anéis de crescimento anual, porcentagem de lenho tardio, etc.) foram similares em madeira doente e madeira saudável. O resultado da espectroscopia Raman não mostrou mudança significativa na estrutura da parede celular ou dos seus componentes. Depois de retirar as partes doentes, o uso ilimitado da madeira é possível. Tratamento térmico da madeira é sugerido antes da utilização para fins de saneamento e estabilidade dimensional.

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“…Polyethylene (PE) is one of the most common, widespread and most inexpensive commodity thermoplastic polymers used for industrial as well as medical applications. Despite the numerous papers published in the literature that deals with the thermally or photochemically induced oxidation of polyethylene 1,2,3,4,5,6,7,8,9,10,11,12,13,14 The aim of this paper is to study the thermal and UV degradation of ethylene/α-olefin copolymers and to compare the mechanisms of thermooxidation at moderate temperature (100 °C) to that of photo oxidation at wavelengths above 300 nm. Different catalysts result in differences in the type and concentration of unsaturations, mainly in vinyl, trans-vinylene and vinylidene groups.…”

Section: Introductionmentioning

confidence: 99%

Photo- and thermal-oxidation of polyethylene: Comparison of mechanisms and influence of unsaturation content

Gardette

Perthué

Gardette

et al. 2013

Polymer Degradation and Stability

419

215

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The behaviour of polyethylene with different contents in vinyl and t-vinylene groups have been studied by photooxidation with λ>300 nm light or by thermooxidation at a temperature of 100 °C. The oxidation was studied by infrared spectroscopy and it was shown that the same oxidation products were obtained, but with different relative concentrations depending on the conditions of ageing, i.e. photochemical or thermal conditions. The mechanisms by which the oxidation products are formed were recalled. The differences between photo-and thermooxidation were evidenced on the basis of the stability of ketones that do not accumulate in photochemical conditions, as a result of Norrish reactions. The influence of the initial amount of unsaturated groups on the rates of oxidation was characterized. It was shown that the concentration of unsaturations had no effect on the rate of photooxidation but dramatically influenced the stability in thermooxidative conditions.

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Photo- and Bio-Degradation Processes in Polyethylene, Cellulose and their Blends Studied by ATR-FTIR and Raman Spectroscopies

Cited by 79 publications

References 38 publications

Degradation Behavior and Accelerated Weathering of Composite Boards Produced from Waste Tetra Pak® Packaging Materials

Degradation Behavior and Accelerated Weathering of Composite Boards Produced from Waste Tetra Pak® Packaging Materials

Physical, Morphological Properties and Raman Spectroscopy of Chestnut Blight Diseased Castanea Sativa Mill. Wood

Photo- and thermal-oxidation of polyethylene: Comparison of mechanisms and influence of unsaturation content

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