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Merck

Time-temperature integrator based on the dewetting of polyisobutylene thin films.

Langmuir : the ACS journal of surfaces and colloids (2010-03-26)
Annalisa Calò, Pablo Stoliar, Francesco Cino Matacotta, Massimiliano Cavallini, Fabio Biscarini
RESUMEN

This work reports the application of a patterned thin film of polyisobutylene (PIB) irradiated with an electron beam as a time-temperature integrator, i.e., a device that is able to record the thermal history of a product. The device is fabricated by irradiation with an electron beam of regions of a PIB thin film to different doses of electrons. A different dewetting behavior occurs at these regions upon thermal exposure, depending on the dose. The experimental results are quantified by means of a model of dewetting based on nucleation and growth of holes in a strong slippage regime.

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Sigma-Aldrich
Polyisobutylene, average Mw ~500,000, average Mn ~200,000 by GPC/MALLS, average Mv ~420,000
Sigma-Aldrich
Polyisobutylene, average Mw ~1,000,000, average Mn ~600,000 by GPC/MALLS, average Mv ~1,200,000