EFFECT OF CRITICAL MOLECULAR WEIGHT OF PEO IN EPOXY/PEO BLENDS AS CHARACTERIZED BY ADVANCED DSC AND SOLID-STATE NMR
Polymer blends which combine the merits of each component play an important role in polymer industry, understanding the miscibility and dynamics between components is the key to high performance polymer blends. Epoxy/Poly(ethylene oxide) (ER/PEO) blend has been widely studied as a model miscible thermosetthermoplastic polymer pair because of the good miscibility between ER and PEO. Till now, many techniques including differential scanning calorimetry, Fourier-transform infrared spectroscopy, dynamics mechanic analysis, dielectric relaxation spectroscopy have been used to characterize the miscibility, phase morphology of the ER/PEO blends. It is general accepted that PEO with different molecular weight is completely miscible with ER by means of possible hydrogen bonding interaction between the two components. However, the length scale of the miscibility and local dynamics in ER/PEO blend are still not well understood. In this work, the effect of PEO molecular weight in ER/PEO blends on the miscibility, inter-chain weak interactions and local dynamics were systematic investigated by advanced temperature modulated DSC (TOPEM) and solidstate NMR techniques. Our finding indicates that molecular weight (Mw) of PEO is a crucial factor in controlling the miscibility, chain dynamics and hydrogen bonding interaction in these blends.
Shoudong Lu Shen Yu Tiehong Chen Pingchuan Sun Datong Ding An-Chang Shi
Key Laboratory of Functional Polymer Materials, Ministry of Education, College of Chemistry and Coll Department of Physics and Astronomy, McMaster University, Hamilton,Ontario L8S 4M1, Canada
国际会议
PP’2010，Jinan International Symposium on Polymer Physics(2010济南国际高分子物理学术研讨会)
济南
英文
55-56
2010-06-06（万方平台首次上网日期，不代表论文的发表时间）