Naslov
Topochemical Modification of Poly (Ethylene Terephtalate) Ffibers : Kinetic of Fiber Aalkaline Hydrolysis

Autori
Grancarić, Anamarija ; Tarbuk, Anita ; Kallay, Nikola ; Tomašić, Vlasta

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
World Textile Conference 3rd AUTEX Conference Civiltex 2003 Textiles-Necessary Condition for Development of Civilisation, Tex E&R 2003 Textile Education & Research : Evolution or Revolution / Krysinski, Jan et al. - Łódź : Technical Unversity of Lodz, 2003, 29-33

Skup
AUTEX Conference Civiltex 2003

Mjesto i datum
Gdańsk, Poljska, 25.06.2003. - 27.06.2003

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
PET fabrics ; alkaline hydrolysis ; kinetic model ; cationic compounds

Sažetak
Alkaline polyester hydrolysis is topochemical saponification of polyester fibers that results in fiber weight loss, reducing of diameter and strength of fibers as well. The effect of hydrolysis is better look of fabric, which becomes more like pure silk. In practice the alkaline hydrolysis is done by a relatively concentrated aqueous sodium hydroxide solution at elevated temperature (T= 90-1200C). Some cationic compounds like cationic surfactants accelerate this hydrolysis yielding much higher weight loss of polyester fabric. In order to obtain the optimal and uniform effects the proper stirring, controlled NaOH concentration, temperature, addition of accelerator and mass to volume ratio is needed. Developed physicochemical model describing kinetic of hydrolysis of polyester fiber in alkaline solution was applied for analyzing of experimental data. The influence of temperature effect is considered on the basis of the Arrhenius activation energy (Ea.). The model takes into account the decrease of surface area and OH ion concentration describes the process completely by first order rate constant. In the present work the effect of different compounds, cationic surfactant and 3-chloro-2hydroxylpropyl trimethyl ammonium chloride (CHPTAC) on kinetic of alkaline dissolution of polyester fiber is discussed on the basis of theoretical model.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Tekstilna tehnologija

POVEZANOST RADA