INVESTIGADORES
VILLAR Marcelo Armando
artículos
Título:
Study of Oriented Block Copolymers Films Obtained by Roll-casting
Autor/es:
M.A. VILLAR; D.R. RUEDA; F. ANIA; E.L. THOMAS
Revista:
POLYMER
Editorial:
Elsevier Science Ltd.
Referencias:
Lugar: Amsterdam ; Año: 2002 vol. 43 p. 5139 - 5145
ISSN:
0032-3861
Resumen:
Roll-casting orientation of cylinder microphase separated poly(styrene-b-butadiene-b-styrene) triblock copolymers, was analyzed. The mechanical anisotropy of roll-cast films, defined as the ratio of Young?s modulus obtained parallel and perpendicular to poly(styrene) cylinders, is similar for samples prepared using a dimensionless minimum gap between rolls higher than approximately 0.02. The orientation of samples was also characterized by measuring the full width at the half intensity maximum of small angle X-ray scattering intensity circle profiles and showed good correlation with modulus measurements. Blends of triblock and diblock with up to 60 wt% of diblock show orientation as good as the neat triblock sample.
