POLYMERIZATION OF OCTAMETHYLCYCLOTETRASILOXANE WITH HEXAMETHYLDISILAZYL-LITHIUM AS INITIATOR*

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POLYMERIZATION OF OCTAMETHYLCYCLOTETRASILOXANE WITH HEXAMETHYLDISILAZYL-LITHIUM AS INITIATOR*

Papers | Updated：2021-06-21

- POLYMERIZATION OF OCTAMETHYLCYCLOTETRASILOXANE WITH HEXAMETHYLDISILAZYL-LITHIUM AS INITIATOR*
- Vol. 19, Issue 1, Pages: 7-11(2001)
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- Published：20 February 2001
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POLYMERIZATION OF OCTAMETHYLCYCLOTETRASILOXANE WITH HEXAMETHYLDISILAZYL-LITHIUM AS INITIATOR*[J]. 2001, 19(1): 7-11.
DOI：

POLYMERIZATION OF OCTAMETHYLCYCLOTETRASILOXANE WITH HEXAMETHYLDISILAZYL-LITHIUM AS INITIATOR*[J]. 2001, 19(1): 7-11. DOI：

摘要

This work focused on the anionic polymerization of octamethylcyclotetrasiloxane (D4

D = Me2SiO2/2) initiated by a new kind of initiator hexamethyldisilazyl-lithium (MMNLi). 29Si-NMR spectroscopy and gas chromatography (GC) were used to characterize the polymerization products. The process was accelerated by adding a small amount of high activity monomer D3 and by raising the polymerization temperature. At the end of polymerization more than 95% of the monomer was converted to polymer and only a very small amount ofD4 and D5 remained in the polymers.

Abstract

This work focused on the anionic polymerization of octamethylcyclotetrasiloxane (D4

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