A series of random polyesteramides (PEAs) with a range of molar composition from 90/10 to 50/50 were synthesized by direct melt polycondensation of ε-caprolactone and L-alanine. Their structure was fully characterized by Fourier transform IR and NMR spectroscopy. The resulting copolymers are completely amorphous with the exception of PEA-90/10 which possesses a semicrystalline structure. These PEAs present increasing glass transition temperatures at increasing L-alanine contents and exhibit fairly good thermal stability with 10% mass loss temperatures reaching 315°C.
The possibility of mechanochemical initiation of copolymerization reactions was studied and the influence of the initial composition on the reaction efficiency made evident. Binary and ternary mixtures containing acrylonitrile, vinyl acetate and a-methyl styrene were subjected to copolymerization and regression equations correlating the conversion and the product solubilities in DMF with comonomer concentrations were derived.
Mechamchemisch initiierte Copolymerisation. 4. Mechanochemisehe Synthese einiger binarer und ternirer Copolymere durch SchwingmahlungDie Moglichkeit der mechanochemischen Initiierung von Copolymerisationsreaktionen und der EinfluB der Zusammensetzung des Monomergemisches auf die Reaktivitat wurden untersucht. Binare und ternare Mischungen von Acrylnitril, Vinylacetat und a-Methylstyren wurden copolymerisiert. Fur die Korrelation zwischen der Konzentration der Comonomere und dem Umsatz sowie der Loslichkeit in DMF wurden Regressionsgleichungen abgeleitet.
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The paper presents the overall results of theoretical achievements and experimental details when designing a material for a textile fabric, which releases a drug for a specific pathology. It presents the conclusions of the researches on the development of textile support as an anti-allergic, anti-fungal and anti-psoriasis type, but also on toxicological, biocompatibility and therapeutic issues for establishing the amount of drug needed for the trans-dermal diffusion. This paper estimates the possibility of applying a cyclodextrin (Cyc) on a textile surface to form temporary reservoirs by complexing and subsequently releasing the drug under the action of cutaneous stimuli. One refers to the achievements of authors, and works submitted by other research groups in the area of textile substrates used as implant or underwear worn next to the skin. The results are analyzed both as a scientific communication and the possible application for a potential current industrial processing.
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