✦ LIBER ✦

Anionic copolymers of caprolactam with laurolactam (nylon 6/12 copolymers)—I. Preparation and general properties

✍ Scribed by A.H. Kehayoglou

Publisher: Elsevier Science
Year: 1983
Tongue: English
Weight: 440 KB
Volume: 19
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(83)90124-6

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✦ Synopsis

Copolyamides ofhigh mol.wt were obtained by the anionic copolymerisation of E-caprohtctam with ,)-laurolactam at 180 C. using a sodium caprolactamate-N-phenylcarbamoylcaprolactam initiator activator system. The proportions of co-units in the copol',mers were close to those in the comonomer feeds. The copolymers were crystalline and substantially ful b hydrogen-bonded over the ,,','hole range of compositions: except at 50:50 mole",, ratio, each displa,,ed only one crystalline phase corresponding to that of the major component. 7",, and density measurements indicated a crystallinity minimum at 50 60 mole",,NH(CH 21scO unit content. The properties of the copolyamides were consistent with random copolymeric structures.

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