Effect of swelling agents on unoriented nylon-6 film-Structural changes

Abstract

93-99<span style="font-size:11.0pt;line-height:115%; font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" calibri;mso-fareast-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;="" mso-bidi-font-family:"times="" new="" roman";color:black;mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">Unoriented nylon-6 films were subjected to aqueous formic acid and benzyl alcohol treatments. Formic acid was found to be more active in causing structural changes. The highest possible formic acid concentration that could be used advantageously was found to be 50% owing to heavy shrinkage at higher concentrations. Solvent-induced crystallization with respect to time of treatment and concentration of solvent revealed entirely different trends<span style="font-size:11.0pt; line-height:115%;font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;="" mso-fareast-font-family:calibri;mso-fareast-theme-font:minor-latin;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:"times="" new="" roman";color:#0f0f0f;mso-ansi-language:="" en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">. These treatments give rise to shrinkage of films. WAXD and IR spectroscopy revealed that crystallization results in the formation of a large amount of monoclinic ɑ-crystalline form. Scanning electron micrographs revealed significant changes in surface morphology due to solvent etching.</span