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Polyvinylpyrrolidone-Based Coatings for Polyurethanes – The Effect of Reagent Concentration on Their Chosen Physical Properties

100%
Butruk B., Trzaskowski M., Ciach T.
Chemical and Process Engineering
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2012
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vol. 33
|
issue 4
563-571
EN
A method of manufacturing hydrogel coatings designed to increase the hydrophilicity of polyurethanes (PU) is presented. Coatings were obtained from polyvinylpyrrolidone (PVP) by free radical polymerisation. The authors proposed a mechanism of a two-step grafting - crosslinking process and investigated the influence of reagent concentration on the coating’s physical properties - hydrogel ratio (HG) and equilibrium swelling ratio (ESR). A surface analysis of freeze-dried coatings using scanning electron microscopy (SEM) showed a highly porous structure. The presented technology can be used to produce biocompatible surfaces with limited protein and cell adhesive properties and can be applied in fabrication of number of biomedical devices, e.g. catheters, vascular grafts and heart prosthesis.
2
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Investigations of hydrogen bonding in the poly(urethane-urea)-based membrane materials by using FTIR spectroscopy

100%
Wolińska-Grabczyk A., Kaczmarczyk B., Jankowski A.
Polish Journal of Chemical Technology
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2008
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vol. 10
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issue 4
53-56
EN
FTIR analysis was used to study the hydrogen bonding in 4,4'-diaminodiphenylmethane-based segmented poly(urethane-urea)s varying in the length of the poly(tetramethylene oxide) (PTMO)-based soft segments. Experiments were designed to follow the IR absorption of both the NH and carbonyl regions as a function of temperature in order to directly investigate the extent and strength of the hydrogen bonds, and thereby to gain some information about the possible alteration of the initial phase-segregated morphology as a result of the applied thermal treatment.
3
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Polyvinylpyrrolidone-Based Coatings for Polyurethanes – The Effect of Reagent Concentration on Their Chosen Physical Properties

88%
Ciach T., Butruk B., Trzaskowski M.
Chemical and Process Engineering
|
2012
|
issue 4
4
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Thermal degradation of poly(alkyl methacrylates) and polyurethane pressure-sensitive adhesives

75%
Zych K., Pełech R., Czech Z.
Polish Journal of Chemical Technology
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2010
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vol. 12
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issue 4
40-43
EN
Gas chromatography, coupled with the temperature controlled pyrolysis technique, can be used as a quick method of identification of polymers such as acrylates, methacrylates and polyurethanes. Polymers based on alkyl methacrylates are widely used as construction materials and coatings. Polyurethanes are widely used as self-adhesives, sealants and electrical products (due to polyurethane's low glass transition temperature Tg). The aim of this work is to investigate which products can be obtained from polymethacrylates and polyurethanes.
5
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Properties of polyurethane fibrous materials produced by solution blow spinning

75%
Łopianiak I., Wojasiński M., Butruk-Raszeja B., Łopianiak I., Wojasiński M., Butruk-Raszeja B.
Chemical and Process Engineering
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2020
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vol. 41
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issue 4
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