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- W2073498544 abstract "Abstract A series of lignin-based polyurethane/poly(methyl methacrylate) (LPU/PMMA) interpenetrating polymer networks (IPNs) were prepared by solvent casting in film form. While the LPU/PMMA ratio remained constant (1:1), the properties of the LPU were controlled by varying the composition of the hydroxypropyl lignin polyol via chain extension with propylene oxide. An increase in the lignin content of the polyol resulted in a decrease in the molecular weight between crosslinks (Mc) and change in the morphology of the LPU/PMMA composite. This effect resulted in the transition from a two-phase material to a single-phase material when the (true) lignin content of the composite rose above 25 wt%. As the lignin content increased, the strength properties of the composites increased. The dynamic mechanical, thermal and ultimate mechanical properties of the entire series of IPNs could be explained by dual phase continuity." @default.
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- W2073498544 date "1989-12-01" @default.
- W2073498544 modified "2023-10-15" @default.
- W2073498544 title "Multiphase materials with lignin: 9. Effect of lignin content on interpenetrating polymer network properties" @default.
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- W2073498544 doi "https://doi.org/10.1016/0032-3861(89)90259-0" @default.
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