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Caprolactam‐Laurolactam Copolymers: Fast Activated Anionic Synthesis, Thermal Properties and Structural Investigations
Author(s) -
Ricco Laura,
Russo Saverio,
Orefice Giustino,
Riva Fernando
Publication year - 2001
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20010601)202:10<2114::aid-macp2114>3.0.co;2-f
Subject(s) - caprolactam , polymer chemistry , crystallinity , monomer , polymer , polymerization , copolymer , materials science , yield (engineering) , anionic addition polymerization , chemical engineering , chemistry , composite material , engineering
Anionic poly(caprolactam‐ co ‐laurolactam) has been isothermally synthesized at 155°C by hexamethylene dicarbamoylcaprolactam as fast activation agent and two Na lactamates (from the mixed monomers or neat caprolactam, respectively) as initiators. The specific roles of both the chosen initiator and the laurolactam content in the feed have been investigated in terms of high polymer yield, structural defects of the polymer chains due to side reactions, T g and T m values, degree of crystallinity, molecular and superlattice order of the copolyamides. Namely, structural and thermal peculiarities of the latter have been brought into evidence on as‐polymerized samples as well as on high polymers after the deoligomerization process. Interesting differences among the various materials have been found and some possible explanations of the above behavior are given.