Tough Glass with Mechanical Bonding Network Anchored by High-Mobility Polymers
Tough Glass with Mechanical Bonding Network Anchored by High-Mobility Polymers
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具有由高迁移率聚合物锚定的机械粘合网络的坚韧玻璃
DOI：
10.1021/acs.macromol.2c02363
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发表时间：
2023
期刊：
影响因子：
5.5
通讯作者：
Ito Kohzo
中科院分区：
文献类型：
--
作者：
Kato Kazuaki;Taniguchi Masayuki;Ito Kohzo
以生物基环状寡糖为原料，加入少量聚合物，制备了一系列机械互锁的超分子玻璃。刚性玻璃态材料易于热成型，其机械性能由寡糖上的取代基调节。即使在少量（<18wt%）聚合物的存在下，只要聚合物渗透通过环状分子，脆弱的寡糖衍生物也会变成坚韧的生物基塑料。环组分上的酰基取代基的微小差异导致机械性能的显著差异。体积较大的取代基单调降低杨氏模量和玻璃化转变温度（Tg），表明环组分之间的相互作用，保持材料框架的优势。然而，韧性急剧变化，独立的相互作用，形成两个玻璃具有相同的杨氏模量和Tg到不同的材料：脆性和韧性。观察到脆性和韧性玻璃之间的明显差异，在其受限的聚合物的流动性。动力学分析表明，较高的流动性的聚合物保持在材料框架的韧性玻璃相比，脆性玻璃，而一个可比的玻璃制备的混合物的两种成分的韧性玻璃是非常脆弱的。这些结果表明，由高迁移率聚合物形成的机械结合网络的必要性，使得受限的聚合物可以作为锚迅速响应于框架中的裂纹形成
A series of mechanically interlocked supramolecular glasses were prepared from a bio-based cyclic oligosaccharide with small amounts of polymer. The rigid glassy materials were readily thermo-moldable, and their mechanical properties were tuned by the substituents on the oligosaccharide. In the presence of even small amounts (<18 wt %) of polymer, fragile oligosaccharide derivatives turned into tough bio-based plastics, as long as the polymer penetrated through the cyclic molecules. A small difference in acyl substituents on the ring components resulted in a significant difference in the mechanical properties. Bulkier substituents monotonically decreased Young’s modulus and the glass transition temperature (Tg), indicating the predominance of interactions between ring components that maintain the material framework. However, the toughness dramatically changed, independent of the interactions, forming two glasses with the same Young’s modulus andTginto different materials: brittle and ductile. A clear difference between brittle and ductile glasses was observed in their confined polymer mobility. Analysis of the dynamics revealed that the higher mobility of the polymer was maintained in the material frameworks of ductile glasses compared with that of brittle glasses, whereas a comparable glass prepared from a mixture of the two components of ductile glass was very fragile. These results suggest the necessity of a mechanical bonding network formed by high-mobility polymers so that the confined polymers can work as an anchor rapidly in response to crack formation in the framework
影响因子：
16.6
作者：
Hu P;Madsen J;Skov AL
通讯作者：
Skov AL
聚乳酸与环糊精复合材料的结构与物理性能
DOI：
10.1007/s10847-018-0859-0
发表时间：
2018
影响因子：
2.3
作者：
T. Yamanobe;Hayata Takeda;Y. Takada;Daisuke Nagai;M. Yoneyama;H. Uehara;Keiko Takahashi
通讯作者：
Keiko Takahashi
聚轮烷玻璃：归因于不同组件的孤立动力学的特殊力学。
影响因子：
5.7
作者：
Kazuaki Kato;Tomo Mizusawa;Hideaki Yokoyama;K. Ito
通讯作者：
K. Ito