Characterization on Propylene Oxide Polymerization with in-situ FT-IR

被引：5
|
作者：
Yang, Peng Fei [1 ,2 ]
Li, Jun Ying [2 ]
Li, Tian Duo [2 ]
机构：
[1] Shandong Inst Light Ind, Instrumental Anal Ctr, Jinan 250353, Peoples R China
[2] Shandong Inst Light Ind, Shandong Prov Key Lab Fine Chem, Jinan 250353, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING APPLICATIONS, PTS 1-3 | 2011年 / 160-162卷
基金：
中国国家自然科学基金;
关键词：
propylene oxide; polymerization; chain-transfer; in-situ FT-IR; MOLECULAR-WEIGHT DISTRIBUTION; ANIONIC-POLYMERIZATION; CROWN-ETHER;
D O I：
10.4028/www.scientific.net/AMR.160-162.60
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In-situ FT-IR technique is used to investigate the polymerization of propylene oxide with potassium t-butoxide as initiator. The epoxy absorbance at 828 cm(-1) is the most useful peaks to monitor the reaction. The absorbance of C-O-C stretching vibration at 1107 cm(-1) is very strong and also very useful. Yet, the absorbance of C-H stretching vibration in 3000 similar to 2800 cm(-1) region is very weak and not reliable for In-situ FT-IR analysis. By monitoring the consumption of propylene oxide, the polymerization rate constant k at 33 degrees C was calculated out and an interesting auto acceleration phenomenon was discovered. Moreover, the chain-transfer process was analyzed by measuring the formation of C=C double bonds, which clarified a former confusion about the course of propylene oxide rearrangement.
引用
收藏
页码：60 / +
页数：3
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