You are here: Home
/ Publication Information
Title: Properties of phenolic adhesives as related to bond quality in southern pine plywood
Author: Hse, Chung-Yun;
Source: Forest Products Journal, Vol. 21(1): 44-52
Publication Series: Miscellaneous Publication
Description: Experimental panels of southern pine plywood were glues up with 72 phenolic resins (36 resins with replication) representing a wide range of properties. In the range tested, contact angle (57 to 105o), heat of curing reaction (95 to 235 cal./g,.), and glueline thickness (8 to 21 cm) were linearly and positively correlated with wet shear strength and percentage of wood failure. Resin shrinkage (11 to 21 percent) during cure also was linearly correlated with ahear strength and percentage of wood failure, but the relationship was negative, i.e., resins with the most shrinkage yielded the poorest bonds. Surface tension, time to cure, and pH were in general negatively correlated with wet shear strength and wood failure; the regression relationships were parabolic with maxima. The most effective bonding occurred when the resin wetted -- but not over penetrated -- the veneer surfaces. For the formulations tested, this condition resulted when the resin had a high contact angle and a surface tension of approximately 68.4 dynes/cm. The optimum glue bonds were from resins with high chemical reactivities. Such resins appeared to produce a high degree of cross linking when cured and required short cure times.
- 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.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication. (Please specify exactly
which publication you are requesting and your mailing address.)
XML: View XML
Hse, Chung-Yun 1971. Properties of phenolic adhesives as related to bond quality in southern pine plywood. Forest Products Journal, Vol. 21(1): 44-52
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility