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biological properties of polyester

⇒ www.HelpWriting.net ⇐, No public clipboards found for this slide. As a result, moisture regains and wettability will improve due to the forming of hydrophilic groups on PET fabrics. The fabric weave is a plain weave the chemicals used in this work was laboratory grade reagents. In the present work 100%, polyester fabric is taken to know the effect of enzyme treatment on the structural modifications. The treated fabrics are dyed using disperse dye with carrier method for polyester. The compression resiliency enhances for polyester fabrics makes the fabric much softer and it retains its original shape as quickly as possible while applying low-stress load and makes the polyester fabric with low shear rigidity. C6H4-CO-O-).DuPont Company of USA first produced polyester fibres on commercial scale in 1953. 3.7 Effect of enzyme treatment on the low-stress mechanical properties of polyester. n HOOC- --COOH + n OH-CH2-CH2-OH HO-[-OC- -COO-(CH2)2O-]n-H Concerted multidisciplinary scientific approaches have been directed to the elucidation of various aspects of PHA. By continuing you agree to the use of cookies. Copyright © 2020 Elsevier B.V. or its licensors or contributors. If you wish to opt out, please close your SlideShare account. All Rights Reserved. Only a genuine service will treat their customer with quality research papers. Of significant interest are the findings that PHA can consist of various hydroxyalkanoate monomers, and the cloning of its biosynthesis genes. It is mainly due to the degradation of chain links and the addition of hydroxyl groups and enhances the dye uptake of the polyester fabrics. The treated fabrics are having improved water vapor permeability when compared with the untreated polyester fabrics. Polyethylene terephthalate (PET) This intriguing biological polyester initially attracted the attention of microbiologists and managed to keep many polymer scientists occupied over the second half of the last century. Textile Today is a regular publication of Amin & Jahan Corporation Ltd. It’s a comprehensive magazine for textile, apparel & fashion industry. 3.5 Effect of lipase treatment on water vapor permeability of polyester. Polyester is a synthetic fabric that’s usually derived from petroleum. Lipase hydrolyses ester linkages in Polyethylene Terephthalate (PET) and produces polar hydroxyl and carboxylic groups. It is mainly due to the degradation of chain links and the addition of hydroxyl groups. The earliest record of polyester creation dates back to 1940 when DuPont wanted to make textile fibers using polyester. • Diolen (France) These studies focus that the applicable enzymes are lipases and polyesterases. It is also noted the presence of basic functional groups inherent in the polyester materials. The test results show that enzymatic process creates less surface damage, weight loss and improved moisture regain dye uptake and shear properties. Lecturer, Department of Textile Processing, GRG Polytechnic College, Tamil Nadu, India. The following comparative FT-IR spectrum reveals the modification in the functional chains which are responsible for the property changes. By controlling the monomer composition of PHA, polymer scientists have shown that the polymer's physical properties can be regulated to a great extent. The fabric samples are magnified to (5000X).The SEM photographs of the Alkaline treated, lipase treated samples are magnified to understand the effect of treatments respectively. The fabrics selected for the experiments are subjected to alkali treatment as well as lipase treatment with different concentrations namely 5%, 10%, and 15%. If you continue browsing the site, you agree to the use of cookies on this website. However, it may lead to PF and determine more common suture breakage on the KS. However, PET has undesirable properties such as pilling, static and lack of dyeability associated with its hydrophobic nature. Learn more. Compression and shear properties are evaluated since it reveals the effectiveness of the enzyme treatment. 3.1 Influence of lipase treatment on weight loss of polyester fabrics. Copyright © 2000 Elsevier Science Ltd. All rights reserved. Clipping is a handy way to collect important slides you want to go back to later. PET fiber has low moisture regain about 0.4% [4]. The most important and widely used polyester is known as polyethylene terephthalate. Compression and shear properties are evaluated since it reveals the effectiveness of the enzyme treatment. The addition of hydroxyl groups in polyester is responsible for the hydrophillicity.

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