Enzymatic synthesis and properties of novel biodegradable and biobased thermoplastic elastomers
Enzymatic synthesis and properties of novel biodegradable and biobased thermoplastic elastomers
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DOI：
10.1016/j.polymdegradstab.2011.10.002
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发表时间：
2011-12-01
影响因子：
5.9
通讯作者：
Matsumura, Shuichi
中科院分区：
文献类型：
--
作者：
Kobayashi, Takuma;Matsumura, Shuichi
以大环内酯为硬链段，甲基12-羟基硬脂酸酯（12 HS）为软链段，通过酶促共聚合制备了分子量为140，000 ~ 290，000 g mol（-1）的新型生物可降解热塑性弹性体聚十二烷醇-12-羟基硬脂酸酯（12 HS）、聚十五烷醇-12 HS和聚十六烷醇-12 HS。用DSC测试了它们的热性能，如Tm和Tc。物理化学和机械性能，如结晶度，也进行了测量。通过使用铕位移试剂的H-1 NMR光谱，相对于两种单体的序列分析聚合物结构。随着聚合时间的延长，聚合物链中两个单体单元的无规度增加。杨氏模量和拉伸强度均随共聚物中12 HS含量的增加而降低。相反，断裂伸长率随着12 HS含量的增加而增加，从而证明了共聚物的弹性体性质。这些共聚物表现出生物降解活性污泥，这也增加了12 HS含量的增加。(C)2011爱思唯尔有限公司保留所有权利。
Novel biodegradable and biobased thermoplastic elastomers, poly[dodecanolide-12-hydroxystearate (12HS)], poly(pentadecanolide-12HS) and poly(hexadecanolide-12HS) with M(W)s of 140,000-290,000 g mol(-1) were prepared by the enzymatic copolymerization of a macrolide as the hard segment and methyl 12HS as the soft segment. Their thermal properties, such as T-m and T-c, were measured by DSC. Physicochemical and mechanical properties, such as crystallinity, were also measured. The polymer structures were analyzed with respect to the sequence of the two monomers by H-1 NMR spectroscopy using an europium shift reagent. The randomness of the two monomer units in the polymer chain increased with the polymerization time. Both Young's modulus and tensile strength decreased with increasing 12HS content in the copolymer. In contrast, elongation at break increased with increasing 12HS content, thus demonstrating the copolymers' elastomeric properties. These copolymers showed biodegradabilities by activated sludge, which also increased with increasing 12HS content. (C) 2011 Elsevier Ltd. All rights reserved.