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Supramolecular Template-Controlled Synthesis of Well-defined Ladder Organic Polysioxane

Author: LvYinSheng
Tutor: WanYouZhi
School: Beijing University of Chemical Technology
Course: Applied Chemistry
Keywords: Supramolecular self-assembly Superstructure Organic bridging group trapezoidal polysiloxane
CLC: O634.41
Type: Master's thesis
Year: 2008
Downloads: 80
Quote: 0
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Abstract


Trapezoidal ultra less structure \This article is designed to demonstrate modern characterization means that the monomer molecules in the course of the reaction force in the supramolecular synergistic effect self-assemble into ordered of high tacticity super structure ( LS ) ; synthesized by a regular trapezoid super structure control high tacticity organic bridging group polysiloxane (OLPS), lay the foundation for the further synthesis of real high tacticity of trapezoidal silsesquioxane . The main contents are as follows : 1. Designed and synthesized a monomer molecule M high Tacticity trapezoidal super structure ( LS ) self-assembled to form hydrogen bonds and π-π stacking synergy . Characterization methods 29 Si- NMR of XRD, VPO, fluorescence spectroscopy , and design a series of comparative experiments show that the monomer molecules in solution can self-assemble into the high Tacticity super structure , further Description the high tacticity super structure (LS) is a the synthetic organic bridging group polysiloxane (OLPS) key . Using the stepwise coupling of the regulation of the supramolecular template / polymerization method, synthesized for the first time a high molecular weight , high stereoregularity organic bridging group polymethylsiloxane (OLPS), respectively the use 29 Si -NMR, IR, XRD, VPO polymer characterization . Its 29 < / sup > Si - NMR spectrum representing the main chain Si0 2/ 2 unit peak baseline half peak width less than 0.3ppm , that Si atoms on the polymer main chain skeleton no branches in a very single environment and cross-linking . 3 . Using supramolecular templates regulation gradually coupling / polymerization method , synthesis of high molecular weight , high regularity of organic base trapezoidal poly phenyl siloxane bridge , through the XRD 29 Si -NMR IR, DSC its structural characterization , the 29 < / sup > Si - NMR spectrum representing the main chain Si0 2/ 2 unit peak baseline half peak width less than 0.3ppm , polymerization was no branching and cross-linking phenomenon .

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CLC: > Mathematical sciences and chemical > Chemistry > Polymer chemistry ( polymer ) > Elements of the organic polymer > Section IV group elements of organic polymers > Silicone polymer
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