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利用活性自由基聚合法合成具官能基團連共聚物之研究(2/3)
Date Issued
2003-06
Date
2003-06
Author(s)
DOI
912216E002016
Abstract
This study includes two parts, the first part is concerned with
using 4-oxo-TEMPO to synthesize poly(butyl acrylate) (PBA) via
nonisothermal process. At first, AIBN, 4-oxo-TEMPO, butyl
acrylate, DDBSA and DMF were used to react under a two stage
temperature, that is the reactants are hold at a temperature for hours
then the temperature is raised to higher temperature, 147 ℃.
In order to control the molecular weight and its distribution,
the effect of the concentration ratio of 4-oxo-TEMPO to AIBN,
solvent amount effect, preheating time, preheating temperature and
content of DDBSA on the molecular weight characteristics of PBA
were investigated. In the second part, PS and PBA macroinitiators
are used to synthesized PS-b-PBA and PBA-b-PS diblock copolymer, respectively.
In experiment analysis, conversions were measured by TGA,
molecular weight and its distribution were measured by GPC, and
the relation between molecular weight and conversion was used to
ascertain if the polymerization is undergone in a living manner.
NMR was used to identify the structure of PBA after the preheating
step. NMR and UV are used to discuss the concentration change of
initiator and stable free radical concentrations, respectively.
using 4-oxo-TEMPO to synthesize poly(butyl acrylate) (PBA) via
nonisothermal process. At first, AIBN, 4-oxo-TEMPO, butyl
acrylate, DDBSA and DMF were used to react under a two stage
temperature, that is the reactants are hold at a temperature for hours
then the temperature is raised to higher temperature, 147 ℃.
In order to control the molecular weight and its distribution,
the effect of the concentration ratio of 4-oxo-TEMPO to AIBN,
solvent amount effect, preheating time, preheating temperature and
content of DDBSA on the molecular weight characteristics of PBA
were investigated. In the second part, PS and PBA macroinitiators
are used to synthesized PS-b-PBA and PBA-b-PS diblock copolymer, respectively.
In experiment analysis, conversions were measured by TGA,
molecular weight and its distribution were measured by GPC, and
the relation between molecular weight and conversion was used to
ascertain if the polymerization is undergone in a living manner.
NMR was used to identify the structure of PBA after the preheating
step. NMR and UV are used to discuss the concentration change of
initiator and stable free radical concentrations, respectively.
Publisher
臺北市:國立臺灣大學化學工程學系暨研究所
Coverage
計畫年度:91;起迄日期:2002-08-01/2003-07-31
Type
report
File(s)
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Name
912216E002016.pdf
Size
2.57 MB
Format
Adobe PDF
Checksum
(MD5):df814596d6aea947f5cbb44f4374ba9d