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Thermal and mechanical properties of some caprolactam-poly(propylene oxide) block copolymers

✍ Scribed by Fernanda M.B. Coutinho; Ariosvaldo A.Barbosa Sobrinho

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
195 KB
Volume
27
Category
Article
ISSN
0014-3057

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✦ Synopsis

Nylon-6 block copolymers with higher impact strength were synthesized using caprolactam as monomer, caprolactam magnesium bromide as catalyst and a telechelic isocyanate-terminated poly(propylene oxide) as macro-activator. Various proportions of macro-activator up to 25 wt~ were employed in order to examine the influence on the mechanical and thermal properties of the block copolymers. Impact strength increased with increase of macro-activator content but Vicat softening point, Rockwell hardness and crystallization temperature on cooling decreased.

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