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Title

Influence of ordering change on the optical and thermal properties of inflation polyethylene films

Author(s)

Morikawa, Junko;  Orie, Akihiro;  Hikima, Yuta;  Hashimoto, Toshimasa;  Juodkazis, Saulius

Abstract

Changes of thermal diffusivity inside femtosecond laser-structured volumes as small as few percent were reliably determined (with standard deviation less than 1%) with miniaturized sensors. An increase of thermal diffusivity of a crystalline high-density polyethylene (HDPE) inflation films by 10–20% from the measured (1.16 ± 0.01) × 10−7 m2 s−1 value in regions not structured by femtosecond laser pulses is considerably larger than that of non-crystalline polymers, 0–3%. The origin of the change of thermal diffusivity are interplay between the laser induced disordering, voids’ formation, compaction, and changes in molecular orientation. It is shown that laser structuring can be used to modify thermal and optical properties. The birefringence and infrared spectroscopy with thermal imaging of CH2 vibrations are confirming inter-relation between structural, optical, and thermal properties of the laser-structured crystalline HDPE inflation films. Birefringence modulation as high as Δn ± 1 × 10−3 is achieved with grating structures.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Micro-Photonics

Source

Applied Surface Science, Vol. 257, no. 12 (Apr 2011), pp. 5439-5442

Publication year

2011

FOR Code(s)

0204 Condensed Matter Physics;  0912 Materials Engineering

Keyword(s)

Femto-second laser structuring;  High density polyethylene;  Polymers;  Thermal diffusivity

Publisher

Elsevier

ISSN

0169-4332

Publisher URL

http://dx.doi.org/10.1016/j.apsusc.2010.11.109

Copyright

Copyright © 2010 Elsevier B.V. The accepted manuscript is reproduced in accordance with the copyright policy of the publisher.

Research Projects

Ultrafast photonic hammer: a new strategy to synthesise super dense super hard nanomaterials, Australian Research Council grant number DP0988054

Full text

Peer reviewed