Degradowalne, włóknotwórcze kopoliestry tereftalanu etylenu i kwasu mlekowego

• Autorzy: Grzebieniak K. , Ratajska M. , Twarowska-Schmidt K.

Warianty tytułu

EN

Degradable fibreforming copolyesters of ethylene terephthalate and L-lacic acid

• Konferencja: Modyfikacja polimerów. 16 Konferencja naukowa połączona z jubileuszem 45-lecia pracy naukowej i 70. urodzin Pani Profesor Bożeny N. Kolarz. 23-26.09.2003 ; Polanica Zdrój, Polska
• Języki publikacji: PL

Abstrakty

EN

Random copolyesters of ethylene terephalate (ET) and L-lactic (LA) having [eta]_red=72-82 cm³/g (by the method for PET) were studied. They contained short sequences of ET_x(x=2.8-3.3) and 25.5-29.5 mol% of LA mainly in form of individual units (LA_y component with y<1.25) and showed T_g=58-64C (after synthesis) and penetrometrically measured melting temperature, T_mp=120-185C (after annealing). The melt-spun 56dtex/16f multifilament yarn having tenacity c..20 cN/tex and elongation 23% was obtained using the copolyester with properties [eta]_red=81 cm³/g , T_g=63C and T_mp -185C. Hydrolytic degradation (55C, pH 7.35) as well as biodegradation tests in aqueous medium (35 and 55C) and in compost (55C) were performed using samples in form of pressed sheets and fibres. Distinet degradation of copolymers was observed only at temperature 55C (close to T_gvalues). It was found that hydrolytic degradability of copolyesters, which was mainly responsible for their behaviour during tests of biodegradation, was highly dependent on parameters of their chemical structure (X and y values).

Słowa kluczowe

PL

kopoliestry etylenotereftalanowe; kopoliestry kwasu mlekowego; biodegradacja; degradacja hydrolityczna

EN

biodegradation; copolyesters

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Prace Naukowe Instytutu Technologii Organicznej i Tworzyw Sztucznych Politechniki Wrocławskiej. Konferencje
• Rocznik: 2003
• Tom: Vol. 52, nr 25
• Strony: 411--412
• Opis fizyczny: Bibliogr. 4 poz.

Twórcy

autor

Grzebieniak K.

• Instytut Włókien Chemicznych, ul. Skłodowskiej-Curie 19/27, 90-570 Łódź

autor

Ratajska M.

• Instytut Włókien Chemicznych, ul. Skłodowskiej-Curie 19/27, 90-570 Łódź

autor

Twarowska-Schmidt K.

• Instytut Włókien Chemicznych, ul. Skłodowskiej-Curie 19/27, 90-570 Łódź

Bibliografia

• [1] GRZEBIENIAK K., Copolyesters of Ethylene Terephthalate and Lactic Acid Susceptible to Hydrolytic Degradation, Fibres & Textiles in Eastern Europe, 1996, 1 , 215-223.
• [2] GRZEBIENIAK K., RATAJSKA M., STROB1N G., Estimation of Hydrolysis and Biodegradation Processes in Ethylene Terephthalate and Lactic Acid Copolymers, Fibres & Textiles in Eastern Europe, 2001,2,61-65.
• [3] WITT U., MÜLLER R.J., DECKWER W.D., New Biodegradable Polyester-Copolymers from Commodity Chemicals with Favorable Use Properties, Journal of Environmental Polymer Degradation, 1995, 3, 215-223.
• [4] WITT U., MÜLLER R.J., DECKWER W.D., Evaluation of the Biodegrability of Copolyesters Containing Aromatic Compounds by Investigation of Model Oligomers, Journal of Environmental Polymer Degradation, 1996, 4,9-20.