Polymer Crystallization in 25 nm Spheres

Details Polymer Crystallization in 25 nm Spheres Polymer Crystallization in 25 nm Spheres

2000-03-30

arxiv.org/abs/cond-mat/0003496v1

Physical Review Letters 84(18) (2000) 4120

Physics

Condensed Matter

Soft Condensed Matter

accepted for publication in Physical Review Letters, 2/28/2000; scheduled for 5/1/2000 issue

Scientific paper

10.1103/PhysRevLett.84.4120

Crystallization within the discrete spheres of a block copolymer mesophase was studied by time-resolved x-ray scattering. The cubic packing of microdomains, established by self-assembly in the melt, is preserved throughout crystallization by strong interblock segregation even though the amorphous matrix block is well above its glass transition temperature. Homogeneous nucleation within each sphere yields isothermal crystallizations which follow first-order kinetics, contrasting with the sigmoidal kinetics normally exhibited in the quiescent crystallization of bulk polymers.

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