At a constant molecular weight (ca.
100,000 g/mol) and a constant composition (styrene
volume fraction w0.70), all the basic morphologies
observed in diblock copolymers can be produced via a
change in chain architecture. Consequently, a variety
of micromechanical mechanisms ranging from crazing
to homogeneous deformation are observed.
Further, a change in processing conditions significantly
alters the morphology and the deformation
behavior. As a result, without altering the overall
composition, mechanical properties are adjusted over
a wide range. It is shown that architectural and
interfacial modification may provide a novel route
toward controlling mechanical properties of these
nanostructured materials.
At a constant molecular weight (ca.100,000 g/mol) and a constant composition (styrenevolume fraction w0.70), all the basic morphologiesobserved in diblock copolymers can be produced via achange in chain architecture. Consequently, a varietyof micromechanical mechanisms ranging from crazingto homogeneous deformation are observed.Further, a change in processing conditions significantlyalters the morphology and the deformationbehavior. As a result, without altering the overallcomposition, mechanical properties are adjusted overa wide range. It is shown that architectural andinterfacial modification may provide a novel routetoward controlling mechanical properties of thesenanostructured materials.
การแปล กรุณารอสักครู่..
