Synthesis and Properties of Nylon 4/5 Copolymers for Hydrophilic Fibers

Title
Synthesis and Properties of Nylon 4/5 Copolymers for Hydrophilic Fibers
Author(s)
김준호강경석홍유경김영준[김영준]
Keywords
EPSILON-CAPROLACTAM; POLYMERIZATION; POLYAMIDE-4; PYRROLIDONE; MECHANISM; LACTAMS
Issue Date
201407
Publisher
KOREAN FIBER SOC
Citation
FIBERS AND POLYMERS, v.15, no.7, pp.1343 - 1348
Abstract
Nylon 4, which can be synthesized by anionic ring-opening polymerization, has good mechanical properties and a very high affinity for water owing to its high polarity. On the other hand, despite its high melting temperature, the polymer has not been commercialized because of its low thermal stability. In this study, copolymerization of 2-pyrrolidone (C4) with 2-piperidone (C5) was performed to reduce the melting temperature of Nylon 4 homopolymer. The copolymerization reaction was controlled by changing the comonomer content, catalyst content, temperature, initiator content, and reaction time. The Nylon copolymers were characterized by H-1-nuclear magnetic resonance (NMR) spectroscopy, differential scanning calorimetry, and thermogravimetric analysis. The hydrophilic properties of Nylon 4 and its copolymers were evaluated by surface free energy analysis and moisture regain measurement. The intrinsic viscosity and polymerization yield of Nylon 4 increased with increasing catalyst concentration until 5 mole% and decreased with further increases in catalyst loading. The proton NMR spectrum revealed the composition of the Nylon 4/5 copolymer to be 62.5 % C4 moiety at a 5:5 comonomer feed ratio. The melting temperature of the Nylon 4/5 copolymers decreased considerably according to the composition. The moisture regain of the Nylon 4/5 copolymer was higher than 6.4 % even at 77.3 % C4 in composition.
URI
http://hdl.handle.net/YU.REPOSITORY/31461http://dx.doi.org/10.1007/s12221-014-1343-0
ISSN
1229-9197
Appears in Collections:
공과대학 > 화학공학부 > Articles
공과대학 > 융합섬유공학과 > Articles
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