Add time:08/18/2019         Source:sciencedirect.com

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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