Dynamic Mechanical Properties of Polymeric Diphenylmethane Diisocyanate/bio-Oil Adhesive System
2012
Mao, An | Shi, Sheldon Q.
Bio-oil obtained from the pyrolysis of pine wood was mixed with polymeric diphenylmethane diisocyanate (pMDI) to form an adhesive binder system for flakeboard. Acetone was added for reducing the viscosity of the adhesive system. The thermal properties and curing behavior of five different adhesive mixes were examined using dynamic mechanical analysis (DMA). Temperature scans were performed in a range of 50[degrees]C to 200[degrees]C with a heating rate of 10[degrees]C/min, frequency of 1 Hz, and strain amplitude of 15 [micro]m. Results indicated that less time was needed to reach the maximum storage modulus of the adhesive mix with an increase in bio-oil content. The adhesive with the pMDI/bio-oil ratio of 25/75 presented the fastest curing speed but the lowest modulus value at temperatures of approximately 100[degrees]C. The pMDI-acetone adhesive showed the best thermal mechanical properties among the five adhesive binder systems.
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by National Agricultural Library