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Kompozyty na osnowie biodegradowalnego kopoliestru modyfikowane dwutlenkiem tytanu, cząstkami celulozy oraz związkami miedzi na opatrunki elastyczne w weterynarii

Mazur K., Kuciel S.

Przetwórstwo Tworzyw

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2017

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T. 23, Nr 5 (179)

390--398

PL

W pracy dokonano oceny możliwości wykorzystania biodegradownych kopoliestrów termoplastycznych na opatrunki stosowane w weterynarii. Dla zrealizowania badań fizykomechanicznych przygotowano kompozycje na osnowie biodegradowalnego, termoplastycznego kopoliestru termoplastycznego firmy NaturePlast, modyfikowanego związkami miedzi oraz dwutlenkiem tytanu z dodatkiem mikrocelulozy. Metodą wtryskiwania wytworzono następujące kompozyty: kopoliester z 15% domieszką miedzi (TPU-M), kopoliester z 15% domieszką bieli tytanowej (TPU-B), kopoliester z 15% domieszką celulozy (TPU-C), kopoliester z 5% domieszką miedzi, 5% domieszką bieli tytanowej oraz 5% domieszką celulozy (TPU-Z). Na otrzymanych próbkach wykonane zostały badania zmian podstawowych właściwości wytrzymałościowych na kolejnych etapach degradacji hydrolitycznej oraz cech mikrostruktury dla oceny homogenizacji wszystkich trzech składników. W podsumowaniu przedstawiono wnioski z badań oraz podano przykład możliwości wykorzystania zaproponowanej kompozycji na opatrunek wykonany z biodegradowalnego kopoliestru.

EN

The paper evaluates the possibilities of using biodegradable thermoplastic copolyesters for dressings used in veterinary medicine. In preparation for the physico-mechanical research, compositions based on the biodegradable, thermoplastic copolyester manufactured by NaturePlast, modified with copper compounds and titanium dioxide with the addition of microcellulose were prepared. The following compositions were applied using injection method: copolyester with 15% copper admixture TPU-M, copolyester with 15% titanium white admixture TPU-B, copolyester with 15% cellulosem admixture TPU-C, 5% copper admixture copolyester, 5% titanium white admixture and 5% cellulose admixture (TPU-Z). On the samples obtained, a research on changes in basic strength properties was carried out at subsequent stages of hydrolytic degradation and microstructure characteristics for the homogenization of all three components. The conclusions of the study were summarized in the following paper and an example of the possibility of using an exemplary composition for a dressing made from biodegradable copolyester was suggested.

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Effect of composting plant material with copolyester on quality of organic matter

Kopeć M., Twarowska-Schmidt K., Gondek K.

Ecological Chemistry and Engineering. S

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2016

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Vol. 23, nr 1

143--154

EN

The problem of incorporating plastics into the environment will be aggravating, both regarding its scale and kind of these materials. Investigations were carried out using aliphatic-aromatic copolyester poly (succinate-co-glutarate-co-adipate-co-terephthalate 1,4-butylene) with addition of fatty acid dimers. The work aimed to determine the effect of composting the copolyester with plant biomass on changes of fractional composition of humus substances and their stability. Copolyester was supplemented to the biomass in the form of a nonwoven fabric in two doses. It constituted 8 and 16% of the dry mass of the composted substrates. The composting process was run within two ranges of ambient temperature 25-30°C and 40-45°C. After the completion of this process, the degree of material maturing was assessed using manometric methods and the carbon content was analysed in the individual organic matter fractions. On the basis of cumulated respiratory activity AT4 a lack of composted material activity was revealed in the higher temperatures of the process. However, in the objects where copolyester was transformed in the lower temperatures this activity was considerably diversified. Adding copolyester to the composted biomass led to a diversification of the Cha : Cfa ratio. The values of Cha : Cfa ratio most approximating 1.5, ie the value regarded as optimal, were registered in the object, where copolyester supplement constituted 16% and the plant biomass was maintained within the 40-45°C temperature range.

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Aliphatic-Aromatic Co-polyesters Received from Poly(ethylene terephthalate) Wastes

Michalski A.

Fibres & Textiles in Eastern Europe

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2001

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Vol. 9, no. 1 (32)

44--47

EN

The results of research into utilisation of poly(ethylene terephthalate) (PET) wastes are presented in this paper. PET wastes have been subjected to reaction with esters of low-molecular aliphatic dicarboxylic acids to receive co-polyesters (KPEs) with properties dependent on the weight ratio of the particular substrates. For selected weight ratios of the raw-materials used, copolymers characterised by the following parameters have been received: glassy temperature ranging from -24°C up to +40°C, melting temperature from 50°C up to 220°C, crystallisation temperature from 80° C up to 160°C and melt flow index of 3-35 g/10 min. The polymers have had different forms: from elastic and plastic masses, through elastic and hard materials to hard and fragile materials.

PL

Przedstawiono wyniki badań nad wykorzystaniem odpadów poli (tereftalanu etylenu) (PET). Odpady PET poddano reakcji z estrami niskocząsteczkowych alifatycznych kwasów dwukarboksylowych, otrzymując kopoliestry (KPEs) o właściwościach zależnych od stosunku wagowego substratów. Dla badanych wagowych stosunków surowców uzyskano kopolimery o temperaturach: zeszklenia w granicach od -24°C do +40°C, topnienia 50-220°C, krystalizacji 80-160°C i wskaźnikach płynięcia 3-35 g/10 min. Polimery miały charakter od elastycznych i plastycznych mas, poprzez elastyczne i twarde, do twardych i kruchych tworzyw.

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Rheological properties, structure and thermal behavior of liquid crystalline copolyester

Levchenko A. A., Abdullaev K. M., Antipov E. M., Kulichikhin V. G., Stamm M.

Applied Mechanics and Engineering

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1999

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Vol. 4, no spec.

289-296

EN

Rheological properties and thermal behavior of a copolyester (CPE) prepared as high oriented fibers from PET, hydroxybenzoic, terephthalic acids and hydroquinone (40:20:20:20 mol %) in a temperature range of 30-350oC have been investigated by capillary viscosimetry, WAXS, SAXS and DSC. The copolyester under study can be characterized by an existence of two temperature regions with various shapes of flow curves. Different values of flow activation energies in the low and high temperature regions were determined. This material revealed a prominent dependence of viscosity on a residence time at 240oC and its absence at higher temperatures. It has been found that the non-crystalline structure of as-spun fibers can be identified as a LC smectic state with non-periodic layers. The crystalline phase (~8 %) coexists with LC one. A first-order phase transition takes place at 220oC, related to a presence of block sequences of PET that can be formed during the synthesis. The remaining part represents solid crystalline phase melting at 293oC. This phase plays role of net junctions that prevent the actual flow of soften CPE. Therefore, in a temperature range 240-250oC a pure slippage and a superposition of the flow and slippage ( 255-280oC) take place. Only at T>290oC a real flow proceeds.