What question did this study set out to answer?

Investigate the crystallization mechanisms and kinetics of polyethylene confined within nanoscale one-, two-, and three-dimensional diblock copolymer geometries.

November 1, 2001Macromolecules

Polymer Crystallization Confined in One, Two, or Three Dimensions

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Authors

YLYueh‐Lin LooPrinceton University RRRichard A. RegisterPrinceton University ARAnthony J. RyanRoyal Society

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Implication

Materials characterization study demonstrates how nanoscale spatial confinement dictates crystallization kinetics in block copolymers, highlighting domain connectivity effects.

Key Points

Investigate the crystallization mechanisms and kinetics of polyethylene confined within nanoscale one-, two-, and three-dimensional diblock copolymer geometries.
Analyzed polyethylene-b-poly(vinylcyclohexane) (E/VCH) diblock copolymers self-assembled into spheres, cylinders, gyroid channels, or lamellae.
Characterized structural morphology and phase transitions using transmission electron microscopy (TEM), dilatometry, and time-resolved small-angle X-ray scattering (SAXS).
VCH glassy matrix contracted during crystallization of the E microdomains, enabling crystallization to proceed without cavitation.
Spherical and cylindrical domains exhibited homogeneous nucleation with first-order crystallization kinetics, whereas interconnected gyroid structures showed conventional sigmoidal kinetics.
Lamellar domains displayed a two-step crystallization profile, featuring heterogeneous nucleation across interconnected defects at higher temperatures and homogeneous nucleation in isolated lamellae at lower temperatures.

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Loo et al. (2001) studied this question.

synapsesocial.com/papers/6a01c7debd6301933f5cbd63 https://doi.org/10.1021/ma011521p

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Implication

Materials characterization study demonstrates how nanoscale spatial confinement dictates crystallization kinetics in block copolymers, highlighting domain connectivity effects.

Polymer Crystallization Confined in One, Two, or Three Dimensions

Discussion

Member takes

Implication

Key Points

Cite This Study

Polymer Crystallization Confined in One, Two, or Three Dimensions

Discussion

Member takes

Implication

Key Points

Cite This Study

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