Temat: polylactic - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Biopolymers in wood-based materials – a recent review
Autorzy:: Gumowska, Aneta
Kowaluk, Grzegorz
Tematy:: biopolymer
wood
composite
polylactic
polyhydroxybutyrate
polycaprolactone; Pokaż więcej
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Powiązania:: https://bibliotekanauki.pl/articles/2200181.pdf Link otwiera się w nowym oknie
Opis:: Biopolymers in wood-based materials – a recent review. The aim of the paper was to summarize the current state-of-art in the field of biopolymers application in the composites based on lignocellulosic raw materials. The cited literature show, in research and experiments, how promising the green composites market becomes. Biocomposites are becoming more interesting and promising alternative to commonly used petropolymers, which have a negative impact on health and the environment.
Biopolimery w materiałach drewnopochodnych – najnowszy przegląd. Celem pracy było podsumowanie aktualnego stanu wiedzy w zakresie zastosowania biopolimerów w kompozytach opartych na surowcach lignocelulozowych. Cytowana literatura pokazuje, w badaniach i eksperymentach, jak obiecujący staje się rynek „zielonych kompozytów”. Biokompozyty stają się ciekawszą i obiecującą alternatywą dla powszechnie stosowanych petropolimerów, które mają negatywny wpływ na zdrowie i środowisko.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Determination of thermal properties of polylactide
Autorzy:: Dobrakowski, Karol
Kwiatkowski, Dariusz
Tematy:: DSC
PLA
polylactic acid
polylactide
polymer; Pokaż więcej
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Powiązania:: https://bibliotekanauki.pl/articles/1179532.pdf Link otwiera się w nowym oknie
Opis:: The article contains information related to a material that is polylactide, also known as polylactic acid. The results of study presented in the article are related to the PLA moldings made with the use of the 65 - 160 C1 injection molding machine. The publication presents the results of thermal analysis obtained by using differential scanning calorimetry (DSC), thanks to which the thermal properties of polylactide were determined. The results that have been presented relate to the moldings obtained with different parameters of the injection molding process, while parameters such as the temperature of mold or injection molding are being changed during the process. Conducted examinations are aimed to determine the thermal properties.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Influence of the Structure of Low MolecularWeight Esters on Poly(lactic acid) in the Plasticization Process - part 1
Autorzy:: Sulak, Konrad
Jagodzińska, Sylwia
Draczyński, Zbigniew
Borkowski, Dominik
Madej Kiełbik, Longina
Gzyra-Jagieła, Karolina
Wydawca:: Sciendo
Cytata wydawnicza:: Karolina Gzyra-Jagieła, Konrad Sulak, Zbigniew Draczyński, Longina Madej Kiełbik, Sylwia Jagodzińska and Dominik Borkowski. "Influence of the Structure of Low MolecularWeight Esters on Poly(lactic acid) in the Plasticization Process - part 1". Fibres & Textiles in Eastern Europe Sciendo, 30, no. 3 (2022): 93-101. https://doi.org/10.2478/ftee-2022-0027
Opis:: Polymers derived from renewable sources which are additionally subject to degradation processes are currently an interesting alternative to conventional polymers of petrochemical origin. One of such polymers is poly(lactic acid) (PLA), which can be used in the packaging, textile and also medical industries. Its great advantage is the susceptibility to biodegradation and the nontoxicity of the degradation products. Because of high brittleness and stiffness, the modification of PLA is necessary to improve its plastic deformability, which can expand the new application possibilities. As part of the research work, the modification of PLA by plasticisation was undertaken to improve its plastic deformability properties. The low molecular mass esters from the citrate group and glycerol triacetate were used. The samples extruded from plasticised polymer were characterised using Differential Scanning Calorimetry (DSC) and Gel Permeation Chromatography/Size Exclusion Chromatography (GPC/SEC). The mechanical properties and melt flow rate after modification were determined. The aim of the research was to determine the relationship between the structure of a plasticiser and its ability to reduce the interactions in the polymer chain in order to develop an optimal polymer-plasticiser arrangement. Based on this research, there was no relationship between the efficiency of the plasticisation process and the increasing molecular mass of the plasticiser. The additional chemical (acetyl) group in the plasticiser also does not increase the efficiency of the PLA plasticisation process. In the next steps of the research, functional forms will be produced, i.e. fibers, films, and fittings from the selected polymer-plasticiser systems.
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

Artykuł

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Skocz do pozycji: 4.

Tytuł:: The quality of the wood bonding depending on the method of applying the selected thermoplastic biopolymers
Autorzy:: Gumowska, Aneta
Kowaluk, Grzegorz
Tematy:: biopolymer
polylactic
polycaprolactone
bonding line
shear strength
density profile; Pokaż więcej
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Powiązania:: https://bibliotekanauki.pl/articles/2166514.pdf Link otwiera się w nowym oknie
Opis:: The quality of the wood bonding depending on the method of applying the selected thermoplastic biopolymers. The aim of the research was to determine the effect of the method of applying the biopolymer on the surface of bonding solid wood elements on the quality of the obtained adhesive connection. The results of conducted mechanical research show that the highest average value of shear strength was observed for birch lamellas bonded with PLA, both with the first and second method of application. In case of estimating the quality of the bonding of wooden elements, better results were achieved for PLA and the second method of application the "green" adhesive.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Biodegradable scaffolds for bone defect treatment
Autorzy:: Antonowicz, Magdalena
Brzezinska, Karolina
Walke, Witold
Taratuta, Anna
Pawlik, Mateusz
Tematy:: 3D printing
bone defect
scaffold
Polylactic acid
PLA
veterinary medicine; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/55622211.pdf Link otwiera się w nowym oknie
Opis:: Additive techniques in dog orthopedics has recently emerged as a valuable approach in fabricating individualized implants for receiver-specific needs. The scaffolds made by 3D printing are used to replaces bones damaged by injuries sustained in accidents, tumour resections and defects resulting from disease e.g. osteoporosis. In this way can promote the growth and reconstruction of bone defects structure. These implants should have the right properties to ensure the right conditions for bone fusion. It is also important to determine the time of degradation, which is associated with a significant loss of mechanical properties.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Effect of simulated body fluid on the microstructure of melt spun composite fibers
Autorzy:: Rajzer, I.
Rom, M.
Fabia, J.
Sarna, E.
Biniaś, D.
Zima, A.
Ślósarczyk, A.
Janicki, J.
Tematy:: composites fibers
simulated body fluid
polylactic acid
hydroxyapatite
bone tissue regeneration; Pokaż więcej
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Powiązania:: https://bibliotekanauki.pl/articles/283899.pdf Link otwiera się w nowym oknie
Opis:: Polylactic acid (PLA) offers unique features of biodegradability and thermal processability, that offer potential applications in medicine. PLA can be transformed into fibers by spinning enabling then subsequent fabrication of desirable three dimensional fabrics which may be used as scaffolds for tissue engineering applications. Incorporation of synthetic nano-hydroxyapatite into the fibrous polymer matrix can enhance bioactive properties of the prospective scaffold. In the present work, the method of production of composite fibers based on polylactic acid (PLA) and nano-hydroxyapatite (n-HAp) is proposed. Obtained fibers have shown excellent apatite-forming ability when immersed in simulated body fluid.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 7.

Tytuł:: Time Distribution Analysis of 3D Prints with the Use of a Filament and Masked Stereolithography Resin 3D Printer
Autorzy:: Paśnikowska-Łukaszuk, Magdalena
Korulczyk, Katarzyna
Kapłon, Kamil
Urzędowski, Arkadiusz
Wlazło-Ćwiklińska, Magda
Tematy:: 3D printing
polylactic acid
fused deposition modeling
stereolithography
masked stereolithography
resin printing; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/2204400.pdf Link otwiera się w nowym oknie
Opis:: The article focuses on the subject of 3D printing. 3D printing technology and currently used solutions are described. The materials used in printing with the use of a filament printer and a resin printer are discussed. The fused deposiotion modeling technique and the LCD-based stereolithography. Printing technology were presented. Samples were prepared using 3D modeling software. The software used to make the models is discussed. The designed models were printed on two types of printers, using different model orientations. Printouts were measured several times. The obtained data was analyzed and the conclusions, proposed solutions and possible improvements to 3D printing were presented at the end. The article deals with the subject of the possibility of accelerating 3D prints due to their location, but also the influence of warming up the printer during subsequent prints was checked.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 8.

Tytuł:: Influence of the Structure of Low MolecularWeight Esters on Poly(lactic acid) in the Plasticization Process - part 1
Autorzy:: Gzyra-Jagieła, Karolina
Sulak, Konrad
Draczyński, Zbigniew
Madej Kiełbik, Longina
Jagodzińska, Sylwia
Borkowski, Dominik
Tematy:: polylactic acid
plasticisation
GPC/SEC
gel permeation chromatography
size exclusion chromatography
citrate
glycerol triacetate; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Powiązania:: https://bibliotekanauki.pl/articles/2171996.pdf Link otwiera się w nowym oknie
Opis:: Polymers derived from renewable sources which are additionally subject to degradation processes are currently an interesting alternative to conventional polymers of petrochemical origin. One of such polymers is poly(lactic acid) (PLA), which can be used in the packaging, textile and also medical industries. Its great advantage is the susceptibility to biodegradation and the nontoxicity of the degradation products. Because of high brittleness and stiffness, the modification of PLA is necessary to improve its plastic deformability, which can expand the new application possibilities. As part of the research work, the modification of PLA by plasticisation was undertaken to improve its plastic deformability properties. The low molecular mass esters from the citrate group and glycerol triacetate were used. The samples extruded from plasticised polymer were characterised using Differential Scanning Calorimetry (DSC) and Gel Permeation Chromatography/Size Exclusion Chromatography (GPC/SEC). The mechanical properties and melt flow rate after modification were determined. The aim of the research was to determine the relationship between the structure of a plasticiser and its ability to reduce the interactions in the polymer chain in order to develop an optimal polymerplasticiser arrangement. Based on this research, there was no relationship between the efficiency of the plasticisation process and the increasing molecular mass of the plasticiser. The additional chemical (acetyl) group in the plasticiser also does not increase the efficiency of the PLA plasticisation process. In the next steps of the research, functional forms will be produced, i.e. fibers, films, and fittings from the selected polymer-plasticiser systems.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 9.

Tytuł:: Modelowanie komputerowe procesu modyfikacji warstw polimerowych PLA pociskami C60
Computer modelling of modification of PLA layers by C60 impact
Autorzy:: Kański, Michał
Opis:: The aim of this thesis was to create the first all-atom model used to simulating bombardment process of organic materials by a C60 impact. Subsequently, it was used to verify a hypothesis about a mechanism of sputtering of group of polymers, such as polylactic acid, where the process is much more efficient than in other systems (e.g. polystyrene). The materials contain oxygen atoms in their structure, which would induce chains decomposition to a cloud of simple gas fragments such as carbon monoxide, carbon dioxide and hydrogen. The much greater specific volume of created molecules theoretically might facilitate the sputtering process.
Celem niniejszej pracy było stworzenie pierwszego w pełni atomistycznego modelu, służącego do symulowania procesu bombardowania materiałów organicznych pociskami C60. Następnie został on wykorzystany do zweryfikowania hipotezy, dotyczącej mechanizmu rozpylania grupy polimerów takich jak poli(kwas mlekowy), w których ten proces zachodzi znacznie bardziej wydajnie niż w pozostałych układach (np. polistyren). Materiały te zawierają w swojej strukturze tlen, który miałby powodować rozpad łańcuchów na chmurę niewielkich fragmentów gazowych, takich jak tlenek i dwutlenek węgla oraz wodór. Znacznie większa objętość właściwa powstałych molekuł teoretycznie powinna ułatwiać zachodzenie procesu rozpylania.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

Inne

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Skocz do pozycji: 10.

Tytuł:: Thermal and mechanical properties of PLA/ENR thermoplastic vulcanizates compatibilized with tetrafunctional double-decker silsesquioxanes
Właściwości termiczne i mechaniczne termoplastycznych wulkanizatów PLA/ENR kompatybilizowanych czterofunkcyjnym silseskwiokanem typu double-decker
Autorzy:: Paszkiewicz, Sandra
Kramek, Grzegorz
Walkowiak, Konrad
Irska, Izabela
Piesowicz, Elżbieta
Rzonsowska, Monika
Dudziec, Beata
Barczewski, Mateusz
Tematy:: polylactic acid
epoxidized natural rubber
dynamic vulcanization
polilaktyd
epoksydowany kauczuk naturalny
dynamiczna wulkanizacja; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Powiązania:: https://bibliotekanauki.pl/articles/59115144.pdf Link otwiera się w nowym oknie
Opis:: The influence of the addition of tetrafunctional double-decker silsesquioxanes (DDSQ-ether- -4OH) on the compatibility, thermal and mechanical properties of polylactide and epoxidized natural rubber (PLA/ENR) vulcanizates was investigated. The apparent cross-linking density and thermal stability of PLA/ENR vulcanizates were also determined. The FTIR analysis confirmed the compatibilizing effect of DDSQ-ether-4OH and the formation of the PLA-g-ENR copolymer. A strong effect of ENR content and DDSQ-ether-4OH addition on the thermal and mechanical properties of the obtained vulcanizates was demonstrated.
Zbadano wpływ dodatku czterofunkcyjnego silseskwioksanu typu double-decker (DDSQ-eter-4OH) na kompatybilność oraz właściwości termiczne i mechaniczne wulkanizatów polilaktydu i epoksydowanego kauczuku naturalnego (PLA/ENR). Oznaczono również pozorną gęstość usieciowania i stabilność termiczną wulkanizatów PLA/ENR. Metodą FTIR potwierdzono kompatybilizujące działanie DDSQ-eter-4OH i utworzenie kopolimeru PLA-g-ENR. Wykazano silny wpływ zawartości ENR i dodatku DDSQ-eter-4OH na właściwości termiczne i mechaniczne otrzymanych wulkanizatów.
Dostawca treści:: Biblioteka Nauki

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