The influence of molecular weight of acid dyes on the yield stress of dyed nylon monofilament

✍ Scribed by Keiko Suganuma; Hiroshi Kuno

• Publisher: John Wiley and Sons
• Year: 1984
• Tongue: English
• Weight: 490 KB
• Volume: 29
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1984.070291103

✦ Synopsis

The yield stress of nylon filament dyed with several acid dyes has been determined as a function of dye content and the molecular weight of acid dyes. The nylon filament dyed with acid dye has greater yield stress than undyed one. The relation between the increment of the yield stress ( f ) due to the adsorption of acid dye and the dye content (0 in the filament can be expressed by parameters A and B as log f = A lo&C -CJ + B, where Co is the dye content under which no contribution to the yield stress is observed and Co depends on the number of sulfonic groups in acid dye. It is found that these parameters A and B are expressed by M (the difference between the molecular weight of acid dye and the weight of S03Na groups in it) as A = 1 -100/M, B = k,Mk: where k, and kz are the constants which depend on the parent chemical structure of dyes. The parameters A and B are expected to give available informations as to the physical state of adsorbed dye on nylon filament.