Title:	Heterogeneous nucleation of a semicrystalline polymer on fiber surfaces
Author(s):	Lee, Sangyeob; Shupe, Todd f.; Groom, Leslie h.; Hse, Chung Y.
Date:	2006
Source:	In: Recent Developments in Wood Composites: 91-97
Description:	Nucleation phenomenon as affected by the surface conditions of six identical wood/non-wood fibers with three levels of fiber treatments were investigated by a combination of complementary techniques. This study was based on results of a preliminary study on the influence of surface characteristics of thermomechanical pulp (TMP) fibers on the transcrystalline layer (TLC) growth and its correlation with interfacial strength properties. Surface morphology of fiber material and heterogeneous nucleation phenomenon on the fiber material was carried out using scanning electronic microscopy and polarizer light microscopy. The nucleation efficiency was examined in a polymer matrix to determine unity factors, which directly explains Gibbs free energy in a correlation of homogeneous and heterogeneous nucleation. The factor was generated from the crystalline deposit angle measurement on the fiber surface during isothermal crystallization temperature at 140o +- 0.1oC. Both measurements indicate that surface properties of extracted and surface washed fibers influence surface induced heterogeneous nucleation of polypropylene. Morphological changes on the fiber surface were reported due to an elimination of relation of relatively small particles from each level of surface treatment and fewer particles on the fiber surface indicated decreased nucleation ability on the surface.
	View and Print this Publication (1.55 MB)
Pristine Version:	An uncaptured or "pristine" version of this publication is available. It has not been subjected to OCR (Optical Character Recognition) and therefore does not have any errors in the text. However it is a larger file size and some people may experience long download times. The "pristine" version of this publication is available here: View and Print the PRISTINE copy of this Publication (1.40 MB)
Publication Notes:	We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information. This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain. Our on-line publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact the SRS Webmaster, srswebmaster@fs.fed.us if you notice any errors which make this publication unuseable.
	Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility