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Structure evolution in layers of polymer blend nanoparticles.

Joanna Raczkowska¹, Rivelino Montenegro, Andrzej Budkowski

¹Smoluchowski Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland. raczkowska@if.uj.edu.pl

Langmuir : the ACS Journal of Surfaces and Colloids

|May 22, 2007

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Researchers studied early phase evolution in polymer blend nanoparticles. Copolymer additives influenced structure formation and dewetting in deuterated polystyrene/poly(methyl methacrylate) films.

Area of Science:

Materials Science
Polymer Science

Background:

Studying early phase evolution in nanometer polymer blend films is challenging.
Nanoparticle blends offer a route to homogeneous initial compositions.

Purpose of the Study:

To investigate the early stages of phase evolution in nanoparticle polymer blends.
To understand the role of diblock copolymer additives in structure formation.

Main Methods:

Preparation of deuterated polystyrene/poly(methyl methacrylate) (dPS/PMMA) nanoparticle blends.
Annealing of films and analysis using atomic force microscopy (AFM), lateral force microscopy (LFM), and secondary ion mass spectroscopy (SIMS).

Main Results:

Films formed bilayers, a common structure in solvent-cast blends.

Related Experiment Videos

Capillary instability of the dPS-rich layer was influenced by copolymer additives.

Copolymer additives promoted lateral structures that pinned the dewetting process.

Conclusions:

Nanoparticle blends enable the study of early phase evolution.
Diblock copolymer additives play a crucial role in controlling dewetting and structure formation in polymer blend films.