Characterizing the Durability of PF and pMDI Adhesive Wood Composites Through Fracture Testing

The increased use of wood composites in building materials results in a need for a better understanding of wood adhesion. The effects of water and temperature exposure on the durability of wood products were assessed using the double-cantilever beam (DCB) method of fracture testing. The relative durability of phenol-formaldehyde (PF) and isocyanate (pMDI) adhesives was compared using a 2-hour boil test and an environmental test. The feasibility of using oriented strandboard (OSB), oriented strand lumber (OSL) and parallel strand lumber (PSL) for the DCB fracture method was assessed. The fracture resistance of PF was reduced significantly by the aging exposures. The fracture resistance of pMDI did not decrease after the 2-hour boil test. The DCB fracture method was shown to be useful with a square-grooved machined specimen using OSB and OSL.

Name thesis:degree_name

Master of Science

Level thesis:degree_level

masters

Discipline thesis:degree_discipline

Wood Science and Forest Products

Department dc:contributor.department

Wood Science and Forest Products

Grantor dc:publisher

Virginia Tech

Year dc:date.issued

2001

Author dc:creator

• Scoville, Christopher R.

Chair dc:contributor.committeechair

• Loferski, Joseph R.

Committee members dc:contributor.committeemember

• Kamke, Frederick A.
• Frazier, Charles E.

• durability
• accelerated exposure
• fracture testing
• Wood composites

Statement dc:rights

• In Copyright

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Dc Identifier Other

etd-10112001-233044

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/35353