ISSN:
1042-7147
Keywords:
Polyurethane
;
Solvolysis lignin
;
Tensile properties
;
Diphenylmethane diisocyanate
;
Crosslinking
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In order to study the tensile properties of solvolysis lignin polyurethanes, polyurethane (PU) films were prepared from the solvolysis lignin (SL)-polyethylene glycol (PEG)-diphenylmethane diisocyanate (MDI) system, and in addition to this further PU films were also prepared from the SL-MDI system. In the SL-PEG-MDI system, the SL content, the molecular weight of PEG and the NCO:OH ratio were varied in order to control the physical properties. The tensile stress and Young's modulus of the PUs of the SL-PEG-MDI type increased with increasing SL content and NCO:OH ratio. The tensile properties of the PUs from the SL-MDI system showed no NCO:OH ratio dependency; i.e. the mechanical properties of PUs are not influenced by the change in crosslinking. It is possible to control the tensile properties of PUs of the SL-PEG-MDI type by changing the content of PEG and SL at a constant NCO:OH ratio.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pat.1991.220020106
Permalink
