Biodegradable polymer nanocomposites. Part I. Methods of preparation

Introduction of natural fibbers and natural materials into plastics makes their biodegradation easier. Time of degradation of plastic wastes (also foams) in dump becomes shorter. In order to facilitate biodegradation of foams, starch in amount from 5% to 25% wt with respect to the mass of other components was introduced into polyurethane–polyisocyanurate (PUR‐PIR) foams. Starch is susceptible to the action of bacteria in soil and thus, to decomposition. Polyurethane foams can be subjected to easy chemical degradation in glycols. From among all PUR‐PIR foams prepared, one foam with optimum properties (S10 containing 10% wt of starch) was selected for further experiments. Then, the waste “original” foam S10 was subjected to glycolysis in diethylene glycol and ethanolamine (as catalyst). Glycolysate was applied for synthesis of “new” foams. Three foams GS10 containing 0.1, 0.2, and 0.3 of chemical equivalent (ch.eq.) of glycolysate with respect to amount of the original polyol Rokopol RF 55 were prepared. Effect of the amount of glycolysis product in foam composition on properties on the “new” foams was studied. Foam W was used as a reference without starch (W). © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

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“…Biodegradable polymeric nanocomposites are also mentioned in literature 10, 11. They are characterized by low combustibility and high stability.…”

Section: Introductionmentioning

confidence: 99%

Glycolysis of the rigid PUR‐PIR foam modified with starch

Czupryński

Liszkowska

Paciorek‐Sadowska

2012

J of Applied Polymer Sci

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“…Due to implementation of a new polymerisation technique, called ring‐opening polymerisation of lactide, costs of the PLA production were substantially reduced. Then, application of this polymer in a pure form and as a component of nanocomposites has considerably increased, which is beneficial to environment protection 16–18…”

Section: Introductionmentioning

confidence: 99%

“…Then, application of this polymer in a pure form and as a component of nanocomposites has considerably increased, which is beneficial to environment protection. [16][17][18] The PLA application area may be divided into two basic sections. One of them, being developed already for 40 years, includes mostly medical applications, like bioabsorbable surgery threads, orthopaedic and dental implants, surgery Influence of the unit energy (E u ) of corona discharge used for modification of pure polylactide (PLA) and polylactide nanocomposite (PLAC) containing 5 wt% of an aluminosilicate nanofiller (Cloisite 30B) on water (Q W ) and diiodomethane (Q D ) contact angles as well as on surface free energy (g s ) of these polymers was studied.…”

Section: Introductionmentioning

confidence: 99%

Some Effects of Corona Plasma Treatment of Polylactide/Montmorillonite Nanocomposite Films

Żenkiewicz

Richert

Rytlewski

et al. 2009

Plasma Processes & Polymers

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Influence of the unit energy (Eu) of corona discharge used for modification of pure polylactide (PLA) and polylactide nanocomposite (PLAC) containing 5 wt% of an aluminosilicate nanofiller (Cloisite 30B) on water (ΘW) and diiodomethane (ΘD) contact angles as well as on surface free energy (γs) of these polymers was studied. ΘW and ΘD as advancing contact angles were measured with use of a goniometer while γs was calculated by the Owens–Wendt method. It was found that ΘW increased with the rising Eu while ΘD remained approximately constant. Assuming Eu = const, it could be stated that the increase in γs was much more evident for PLA than for PLAC. This increase resulted practically from the change in the polar component of γs because the dispersive component for the two materials only slightly decreased with increase in Eu.

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“…The choice of subject and a range of our investigations results from the growing significance of polylactide nanocomposites, containing montmorillonite fillers [11][12][13].…”

mentioning

confidence: 99%

: Effects of nanofillers and sample dimensions on the mechanical properties of injection-molded polylactide nanocomposites

Żenkiewicz¹,

Richert²

2008

Polimery

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Montmorillonite nanofillers (Cloisite 30B and Nanofil 2), added in the amounts of 3 and 5 weight parts to 100 weight parts of polylactide matrix, negligibly change mechanical properties of the resulting nanocomposites under the preparation conditions applied. Poly(ε-caprolactone), added in the amount of 20 weight parts, considerably reduces tensile strength of the nanocomposites and its use is justified only when the impact strength of the products has to be increased. The sample thickness (the values of 2 and 4 mm were used, according to operative standards) significantly determines the tensile strength, tensile stress at break, and tensile strain at maximal stress of the material.WP£YW NANONAPE£NIACZY I WYMIARÓW PRÓBEK NA WYTRZYMA£OOEAE MECHANICZ-N¥ WTRYSKIWANYCH NANOKOMPOZYTÓW POLILAKTYDOWYCH Streszczenie -Nanonape³niacze montmorillonitowe (Cloisite 30B lub Nanofil 2), dodawane w ilooeciach 3 i 5 cz. mas. do 100 cz. mas. osnowy polilaktydowej, w niewielkim stopniu zmieniaj¹ wytrzy-ma³ooeae mechaniczn¹ wytworzonych nanokompozytów (rys. 1-3). Natomiast poli(ε-kaprolakton), dodawany w ilooeci 20 cz. mas., znacznie zmniejsza wytrzyma³ooeae na rozci¹ganie tych nanokompozytów. Z tego powodu jego stosowanie mo¿e byae uzasadnione wówczas, gdy nale¿y zwiêkszyae udarnooeae materia³u. Badaj¹c próbki o grubooeciach 2 i 4 mm (wymiary te s¹ zgodne z obowi¹zuj¹cymi normami) stwierdzono, ¿e grubooeae próbek istotnie wp³ywa na wyniki badañ wytrzyma³ooeci na rozci¹ganie, naprê¿enia przy zerwaniu i wyd³u¿enia wzglêdnego przy maksymalnym naprê¿eniu. S³owa kluczowe: nanokompozyty, polilaktyd, w³aoeciwooeci mechaniczne, grubooeae próbek.

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Biodegradable polymer nanocomposites. Part I. Methods of preparation

Cited by 14 publications

References 1 publication

Glycolysis of the rigid PUR‐PIR foam modified with starch

Glycolysis of the rigid PUR‐PIR foam modified with starch

Some Effects of Corona Plasma Treatment of Polylactide/Montmorillonite Nanocomposite Films

: Effects of nanofillers and sample dimensions on the mechanical properties of injection-molded polylactide nanocomposites

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