Miscibility in binary blends of aromatic and alicyclic polyamides

• Published in: Journal of applied polymer science 2006-09, Vol.101 (6), p.3971-3978
• Main Authors: Endo, Masahiro, Morishima, Yasuyuki, Yano, Shinichi, Tadano, Kenji, Murata, Yukinobu, Tsunashima, Kenji
• Format: Article
• Language: English
• Subjects: Applied sciences; blends; DSC; electron microscopy; Exact sciences and technology; miscibility; Natural polymers; Physicochemistry of polymers; polyamides; Starch and polysaccharides
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.22912

Miscibility was studied for four polyamide blends of 6I/6T [copolymer consisting of 1,6‐hexamethylene diamine and isophthalic acid (6I) (70 wt %) and terephthalic acid (6T) (30 wt %)] with MXD6 (polyamide of m‐xylenediamine and adipic acid), BAC6 (polyamide of 1,3‐bis(aminomethyl)cyclohexane and adipic acid), TR55 (copolymer consisting of nylon 11 (30 wt %), and polyamide of bis(3‐methyl, 4‐aminocyclohexyl)methane (30 wt %) and isophthalic acid (70 wt %), and CX7323 (polyamide of bis(4‐aminocyclohexyl)methane and dodecanedicarboxylic acid), using differential scanning calorimetry, X‐ray diffraction method, and electronmicroscopic observation. In quenched MXD6/(6I/6T) and BAC6/(6I/6T) blends, MXD6 and BAC6 components were miscible to 6I/6T, but TR55 and CX7323 components were completely phase‐separated from 6I/6T. Interestingly on electronmicroscopic observations, TR55 and CX7323 components were seen as droplets in 6I/6T medium when the content is low, but when 50 wt %, a layered structure was constructed with 6I/6T, reminiscent of morphological structure in block copolymer. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 3971–3978, 2006