Studies on the syndiotactic fraction of poly(phenyl glycidyl ether) (s-PPGE)
Xu, JJ; Yu, YZ
AbstractThe preparation of syndiotactic polymers through ring-opening polymerization of a chiral monomer bearing one asymmetric center in the ring was not found in literature. This paper presents the synthesis and properties of syndiotactic poly(phenyl glycidyl ether) (PPGE). Phenyl glycidyl ether was polymerized under the effect of Bu2SnO-Bu3PO4 condensates (Sn-P). The tacticity of the obtained PPGE was dependent upon the structure of the catalyst. The Sn-P condensate obtained through a condensation reaction at 220 similar to 260 degrees C for 30 similar to 60 min,and then at 150 similar to 220 degrees C for Ih had two kinds of stereoselective center. Syndiotactic-rich PPGE fractions (s-PPGE) were separated from the polymerization products obtained using Sn-P 8000, a condensate prepared by the two-step condensation,as catalyst. The yield of the s-PPGE fractions reduced as the polymerization temperature enhanced,indicating the activation energy for the syndiotactic center in the catalyst is lower than that for the isotactic center. Compared to the insoluble character of isotactic PPGE (i-PPGE) in any known solvents,s-PPGE can be dissolved in solvents such as chloroform and toluene. The crystallization ability of s-PPGE is lower than that of i-PPGE. The thermal induced crystallization of s-PPGE is very slow. However in the presence of an appropriate solvent such as acetone,it may crystallize quickly.
KeywordSyndiotactic Poly(Phenyl Glycidyl Ether) Bu2sno-bu3po4 Condensates
Indexed BySCI
WOS IDWOS:000089003100010
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorXu, JJ
AffiliationChinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Xu, JJ,Yu, YZ. Studies on the syndiotactic fraction of poly(phenyl glycidyl ether) (s-PPGE)[J]. ACTA POLYMERICA SINICA,2000(4):438-442.
APA Xu, JJ,&Yu, YZ.(2000).Studies on the syndiotactic fraction of poly(phenyl glycidyl ether) (s-PPGE).ACTA POLYMERICA SINICA(4),438-442.
MLA Xu, JJ,et al."Studies on the syndiotactic fraction of poly(phenyl glycidyl ether) (s-PPGE)".ACTA POLYMERICA SINICA .4(2000):438-442.
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