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Lignin-Based Triple Shape Memory Polymers
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DOI：10.1021/acs.biomac.5b00655.png)
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摘要
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Lignin-based triple shape memory polymers comprised of both permanent covalent cross-links and physical cross-links have been synthesized. A mixing phase with poly(ester-amine) and poly(ester-amide) network having two distinct glass transitions was hot mixed with more structurally homogenized methanol soluble lignin fraction by one-pot, two-step method. Triple shape properties arise from the combined effect of the glass transition of polyester copolymers and lignin and the dissociation of self-complementary hydrogen bonding and cross-link density. The percentage of recovery in each stage was investigated and it was proved that the first recovery is related with lignin-poly(ester-amine) rich network and the second recovery stage is related with lignin-poly(ester-amide) rich network. The thermal and mechanical properties of the lignin-copolymer networks were also investigated using differential scanning calorimetry and dynamic mechanical analysis.
Keyword:
AVAILABLE DICARBOXYLIC-ACIDS
HYPERBRANCHED POLY(ESTER-AMIDE)S
NETWORKS
BLENDS
VALORIZATION
ISOSORBIDE
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期刊
IF:
5.4
论文数:
1.2W
被引数:
4.1W
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