Citation: You Zhi WAN, Ying Hua LIU, Ping XIE, Rong Ben ZHANG. H-Bonding Self-assembled Template-directed Synthesis of a Reactive Amide-bridged Ladder Polyvinylsiloxane[J]. Chinese Chemical Letters, ;2006, 17(10): 1361-1364. shu

H-Bonding Self-assembled Template-directed Synthesis of a Reactive Amide-bridged Ladder Polyvinylsiloxane

1.
Department of Applied Chemistry, School of Science, Beijing University of Chemical Technology, Beijing 100029;
2.
State Key Laboratory of Polymer Physics and Chemistry, Joint Laboratory of Polymer Science and Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080

Received Date: 5 April 2006

A novel, reactive amide-bridged ladder polyvinylsiloxane (abbr. LP) with M_n=2.4×10⁴ was synthesized for the first time by means of aryl amide H-bonding self-assembled template.The regularity of LP was characterized by the XRD, ²⁹Si NMR and DSC methods. XRD analysis demonstrated the ladder width w=9.09Å and the ladder thickness t=3.89Å, respectively, which are approximately consistent with the molecular simulation-calculated ones:w'=10.60Å and t'=3.06Å. ²⁹Si NMR displayed a resonance peak with small half peak width, △_1/2~4 ppm, for the moiety[=Si(Vi)O_2/2-]_n of LP. Besides, as a collateral evidence, DSC measurement revealed a high glass transition temperature Tg=225℃, suggesting high stiffness of the ladder main chain of LP.
- Ladder polyvinylsiloxane,
- stepwise coupling polymerization,
- amido H-bonding interaction
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