Clinical Chemistry

Branched Polymer I by Jaques Roovers PDF

By Jaques Roovers

ISBN-10: 3540649239

ISBN-13: 9783540649236

The 2 significant other volumes of Advances in Polymer technology numbers 142 and 143 care for glossy points of long-chain branching in man made polymers. The long-chain structure is now more and more used as a layout instrument for targetted polymer homes. the unreal points hide branching via cationic polymerization, uneven branching, poly(macromonomers), dendrimer-polymer hybrids and hyperbranched polymers. 3 contributions hide conception and simulation of branching, resolution homes, and soften circulate of branched polymers, respectively.

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Extra resources for Branched Polymer I

Example text

In a related development, four arm poly(a-MeS), functionalized with methacrylate end groups, has been synthesized by coupling reaction of a-methacryloyloxy functional living poly(a-MeS), obtained by the procedure given above, with tetrafunctional silyl enol ethers 25 [81]. 5 Poly(b-pinene) b-Pinene which is a main component of natural turpentine can be polymerized by living cationic isomerization polymerization [82] (Scheme 10) using TiCl3(OiPr) as a Lewis acid in conjunction with n-Bu4NCl in CH2Cl2 at –40 °C.

32) Other vinyl ethers were also polymerized with initiator 30 under the same experimental conditions [75]. For instance, SiVE and 2-(trimethylsilyloxy)ethyl vinyl ether provided hydrophobic macromonomers which could be desilylated under suitable conditions to obtain the corresponding water-soluble poly(HOVE) without any side reaction of the methacrylate end group. 2 Poly(silyl vinyl ether) Poly(silyl vinyl ether) macromonomers with a styrenic polymerizable function [76, 77] were prepared by the so-called aldol group transfer polymerization of tert-butyldimethylsilyl vinyl ether.

1 Poly(vinyl ethers) Most of the reported poly(vinyl ether) macromonomers have been prepared with a methacrylate end group which can be radically polymerized and which is non-reactive under cationic polymerization conditions [71–73] . Generally, the synthesis was based on the use of the functional initiator 30, which contains a methacrylate ester group and a function able to initiate the cationic polymerization of vinyl ethers. Such initiator can be obtained by the reaction of HI and the corresponding vinyl ether.

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Branched Polymer I by Jaques Roovers

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