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http://dspace.dtu.ac.in:8080/jspui/handle/123456789/602
Title: | ESTABLISHING STRUCTURE-PROPERTY- RELATIONSHIP IN POLYOLEFINS |
Authors: | BARUAH, ABHIJIT |
Keywords: | polyolefins |
Issue Date: | 17-Sep-2007 |
Series/Report no.: | TD-358;101 |
Abstract: | Five commercial samples of polyolefins namely, PP-A, PP-B (both Polypropylene) and LDPE, LLDPE, HDPE have been studied with the aim of developing a deeper understanding of their structure-property relationships. Structural characterization have been carried out at three levels viz., Molecular, Mesoscopic and Macroscopic parameters using a wide range of techniques including Carbon-13 NMR, IR spectroscopy, thermal analysis and High Temperature GPC together with tensile, flexural, impact strength tests, Heat Deflection temperature & Vicat Softening point. Melting temperatures, Melting Enthalpies and Crystallinity values are found to increase with increasing tensile strength and modulus as a direct result of a more regular and close packing of the molecules. Careful examination of the results shows that the presence of co-monomers in the polymer causes the creation of short chain branches and disrupts the regular packing of the molecular chains. Analysis of Carbon-13 NMR data shows that PP... |
Description: | ME THESIS |
URI: | http://dspace.dtu.ac.in:8080/jspui/handle/123456789/602 |
Appears in Collections: | M.E./M.Tech. Polymer Technology |
Files in This Item:
File | Description | Size | Format | |
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majorfull.pdf | 3.93 MB | Adobe PDF | View/Open |
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