New breathable films using a thermoplastic cross-linked starch as a porogen
Article first published online: 3 JUN 2014
Copyright © 2014 Wiley Periodicals, Inc.
Journal of Applied Polymer Science
Volume 131, Issue 21, November 5, 2014
How to Cite
2014), New breathable films using a thermoplastic cross-linked starch as a porogen. J. Appl. Polym. Sci., 131, 41016, doi: 10.1002/app.41016, , and (
- Issue published online: 11 AUG 2014
- Article first published online: 3 JUN 2014
- Manuscript Accepted: 13 MAY 2014
- Manuscript Received: 2 AUG 2013
- Manuscript Revised: 2 AUG 2013
- biopolymers & renewable polymers;
- porous materials
Breathable films, which find in variety of product applications, are conventionally made using mineral porogens such as calcium carbonate (CaCO3). This article addresses a novel biodegradable and highly breathable film without inorganic porogens. Unexpectedly, a thermoplastic cross-linked natural polymer (corn starch) was used successfully to create tortuous passages for film breathability. This concept was demonstrated using two types of thermoplastic cross-linked corn starches as porogens and contrasted to control samples: native corn and chemically cross-linked starches, respectively. The films discussed had increased breathability and mechanical properties relative to the control samples. The film morphology reveals that filler was irregular when thermoplastic starch or CaCO3 was used. The difference in filler from chemically modified cross-linked starch and thermoplastic cross-linked starch was observable as well. It is believed that spherical particles provided by thermoplastic cross-linked starch helps film debonding and porosity during the film stretch processes. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 41016.