期刊
MACROMOLECULES
卷 55, 期 23, 页码 10285-10293出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.macromol.2c01747
关键词
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资金
- JSPS KAKENHI [JP19H05714, JP19H05715, JP19H05716]
- JST PRESTO [JPMJPR21N7]
- JST SPRING grant [JPMJSP2108]
- Eno Science Foundation
Aromatic ester triad mesogens are incorporated into biodegradable aliphatic polycarbonate sequences to enhance their physical properties while maintaining degradability.
We have developed multiblock aromatic/aliphatic condensation polymers, comprising side-chain biofunctionalized aliphatic oligocarbonates and biobased aromatic ester triad mesogens up to 17 wt %. Nanosegregation of the aromatic mesogen-rich domains with diameters of approximately 10 nm from the soft aliphatic polymer matrix is suggested by atomic force microscopy. The polymers exhibit rubberlike properties, unlike the corresponding aliphatic polycarbonate forming viscous liquid. These properties support the interchain interactions between the aromatic mesogens, which can serve as physical cross-linking. The aromatic ester triad mesogens in the multiblock polymers significantly bolster the tolerance to organocatalytic hydrolysis and methanolysis of the polymer chains but are eventually degraded. The multiblock polymers show degradation behavior slightly faster than poly(L-lactide), whereas poly(ethylene terephthalate) remains intact under the same condition. The present study demonstrates the efficacy of aromatic ester triad mesogens incorporated into the sequences of biodegradable aliphatic polycarbonates to enhance their physical properties while retaining degradability.
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