Light Scattering from Copolymer Solutions

✍ Scribed by Ali, Sabz

• Publisher: Wiley (John Wiley & Sons)
• Year: 1978
• Tongue: English
• Weight: 236 KB
• Volume: 10
• Category: Article
• ISSN: 0007-1641
• DOI: 10.1002/pi.4980100203

✦ Synopsis

Abstract

A new type of copolymer from para‐aminobenzoic acid and 6‐aminohexanoic acid was obtained by reacting the monomers in four different mole ratios. The polycondensation was carried out at 80d̀C with triphenyl phosphite as the initiator in N‐methyl‐2 pyrrolidone/pyridine mixture. The molecular weights of unfractionated and fractionated samples were determined by light scattering techniques in solvents of varying refractive index. From the values of second virial coefficient it is concluded that the solvent power for copolymer increases with increasing aminohexanoic acid mole fraction in the case of dichloroacetic acid and trifluoroacetic acetic acid while in dimethyl acetamide it decreases.