Substrate effects on the confined crystallization of polycaprolactone in coextruded nanolayered films

M. Ponting, J. Keum, B. Freeman, A. Hiltner, E. Baer

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

3 Citations (Scopus)


Layer multiplying coextrusion was used to create multilayered films with hundreds or thousands of alternating layers of two polymers. This paper examines the structure-property relationships of poly(ε-caprolactone) (PCL) nanolayers confined by a variety of polymer substrates. AFM, gas transport and WAXS characterizations were utilized to demonstrate that confined PCL nanolayers crystallized as large in-plane lamellae of high aspect ratio. This phenomenon, previously observed only for poly(ethylene oxide) (PEO), may be a more general phenomenon of crystalline polymers. In-plane PCL lamellae were as effective as PEO in reducing the oxygen permeability by more than 2 orders of magnitude. Additionally, the confining polymer substrate was found to affect to orientation of the PCL nanolayers due to chemical compatibility or epitaxial induced crystallization.

Original languageEnglish
Title of host publication69th Annual Technical Conference of the Society of Plastics Engineers 2011, ANTEC 2011
Number of pages5
Publication statusPublished - 2011
Externally publishedYes
EventAnnual Technical Conference of the Society of Plastics Engineers 2011 - Boston, United States of America
Duration: 1 May 20115 May 2011
Conference number: 69th

Publication series

NameAnnual Technical Conference - ANTEC, Conference Proceedings


ConferenceAnnual Technical Conference of the Society of Plastics Engineers 2011
Abbreviated titleANTEC 2011
Country/TerritoryUnited States of America


  • Coextrusion
  • Crystallization
  • Nanolayers

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