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首页> 外文期刊>Journal of Polymers and the Environment >Mechanical Properties and Lipase-Catalyzed Biodegradation of α-Methyl, ε-Caprolactone/ε-Caprolactone Copolymers Obtained by Chemical Modification of Poly(ε-caprolactone)
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Mechanical Properties and Lipase-Catalyzed Biodegradation of α-Methyl, ε-Caprolactone/ε-Caprolactone Copolymers Obtained by Chemical Modification of Poly(ε-caprolactone)

机译：聚（ε-己内酯）的化学改性获得的α-甲基，ε-己内酯/ε-己内酯共聚物的力学性能和脂肪酶催化的生物降解

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摘要

Novel (ε-caprolactone)-based copolymers of different compositions were synthesized by allowing methyl iodide to react with the polycarbanion that resulted from the action of lithium diisopropylamide on poly(e-caprolactone) in THF at - 70℃ under argon atmosphere. The copolymers were characterized by various techniques, namely ~1H nuclear magnetic resonance, size exclusion chromatography, differential scanning calorimetry, x-ray diffraction and visco-elasticimetry. They were submitted to hydrolytic and lipase-catalyzed enzymatic degradation in comparison with genuine PCL. The Young modulus depended on the degree of methylation. In contrast, loss angle and glass transition temperature did not depend on this parameter. It is shown that the lipase-catalyzed degradation of methylated PCL is much slower than in the case of genuine PCL.
机译：在氩气气氛下，于-70℃下，使甲基碘与二异丙基酰胺对THF中聚（ε-己内酯）的作用所产生的碘甲烷反应，合成了不同组成的新型（ε-己内酯）共聚物。共聚物通过各种技术进行表征，即〜1H核磁共振，尺寸排阻色谱，差示扫描量热法，X射线衍射和粘弹性法。与真正的PCL相比，它们经历了水解和脂肪酶催化的酶促降解。杨氏模量取决于甲基化程度。相反，损失角和玻璃化转变温度不取决于该参数。结果表明，脂肪酶催化的甲基化PCL降解要比真正的PCL慢得多。

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