Multiple Hydrogen-Bonded-Induced Chirality Organization in Supramolecular Polymers

• Main Author: 謝宗益
• Other Authors: 朱超原
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/79110621680656726363

碩士 === 國立交通大學 === 應用化學系碩博士班 === 101 === Compared to traditional chemical polymerization, such as radical polymerization, condensation polymerization, physical aggregation in recent years has also been taken seriously. This study is to design a simple synthetic pathway to import multi-point hydrogen bond functional groups at both ends of the polypropylene glycol, and self-assembly was driven to form the polymer chain segment by multiple complementary hydrogen bonding. We determine the product's physical properties. At the same time, we also synthesized the control group, that is to import different supramolecular functional groups, in order to explore the impact of different supramolecular functional groups on the various physical properties .By 1H-NMR, the FT-IR, structures were identified and confirmed (cy) 2PPO, (ur-cy) 2PPO and (cy-amide) 2PPO have been successfully synthesized. With DOSY NMR spectroscopy, in the concentration 0.3g/ml, (ur-cy) 2PPO repeat unit is about 2500, indicate that this multiple complementary hydrogen bonding indeed drive self-assembled into the polymer chain segments. Through optical rotation measurements ,we found (ur-cy)2PPO optically active, the evidence of a class of spiral structure. On the application side, due to the low molecular weight PPO monomer(with ratio polymer/lithium salt=32:1) can film ,therefore supramolecular interactions successfully improve the mechanical properties of the material.