Title page for etd-0823112-172423


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URN etd-0823112-172423
Author Jian-hao Huang
Author's Email Address No Public.
Statistics This thesis had been viewed 5350 times. Download 1581 times.
Department Chemistry
Year 2011
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Synthesis of temperature-responsive PNIPAM/PTMA and their application in the catalyzed oxidation of alcohols to aldehydes and ketones
Date of Defense 2012-07-24
Page Count 83
Keyword
  • LCST
  • TEMPO
  • alcohol catalyzed
  • N-isopropylacrylamide
  • temperature-responsive
  • Abstract Temperature-responsive poly(N-isopropylacrylamide) (PNIPAM)/ poly(2,2,6,6-tetramethylpiperidin-1-oxyl-4-yl methacrylate) (PTMA) copolymer are
    synthesiszed by radical polymerization and atom transfer radical polymerization. The catalytic oxidation of alcohols to aldehydes and ketones using the NIPAM/PTMA copolymer as a catalyst was investigated. The copolymer were characterized by nuclear magnetic resonance spectroscopy, infrared spectroscopy, and gel permeation chromatography. The results of temperature-dependent UV/Vis absorption show that the lower critical solution temperature (LCST) is around 32-42 ℃ as the molecular percentage of PTMA is 0-6%. When the molecular percentage of PTMA is high than 6%, the LCST is not observed. The yield of the catalytic oxidation using the PNIPAM/PTMA copolymer as a catalyst is high than 99% within 30 min. The temperature-responsive PNIPAM/PTMA copolymer can be precipitated and purified by increasing temperature of the reaction solution higher than the LCST.
    Advisory Committee
  • Hsiu-wei Chen - chair
  • none - co-chair
  • Jyh-tsung Lee - advisor
  • Files
  • etd-0823112-172423.pdf
  • Indicate in-campus at 3 year and off-campus access at 3 year.
    Date of Submission 2012-08-23

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