Structure-Property Relationship in Copolyesters: Part II - Thermo-mechanical Characterization of Poly (ethylene terephthalate-hexamethylene terephthalate) Fibres

173-176<span style="font-size:11.0pt;line-height:115%; font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:"times="" roman";mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">Poly (ethylene terephthalate-hexamethylene terephthalate) fibres were characterized by using DTA, DSC and a rheovibron viscoelastometer. Four copolyesters were prepared with different mol % of 1, 6-hexanediol [2.5, 5.0, 7.5 and 10) with respect to ethylene glycol in the initial monomer feed. An increase in hexamethylene content in PET backbone increased the crystallization rate but reduced the crystallite size and overall crystallinity.