عنوان
پدید آورنده
موضوع
رده
کتابخانه
محل استقرار
NATIONAL BIBLIOGRAPHY NUMBER
Number
TLpq304479312
LANGUAGE OF THE ITEM
.Language of Text, Soundtrack etc
انگلیسی
TITLE AND STATEMENT OF RESPONSIBILITY
Title Proper
Synthesis, solution properties and NMR spectroscopy of some polybetaines
General Material Designation
[Thesis]
First Statement of Responsibility
M. M. Ali
.PUBLICATION, DISTRIBUTION, ETC
Name of Publisher, Distributor, etc.
King Fahd University of Petroleum and Minerals (Saudi Arabia)
Date of Publication, Distribution, etc.
1998
PHYSICAL DESCRIPTION
Specific Material Designation and Extent of Item
122
DISSERTATION (THESIS) NOTE
Dissertation or thesis details and type of degree
M.S.
Body granting the degree
King Fahd University of Petroleum and Minerals (Saudi Arabia)
Text preceding or following the note
1998
SUMMARY OR ABSTRACT
Text of Note
The quaternary ammonium salt N,N-diallyl-N-(ethoxycarbonyl)methyl-N-(methoxycarbonyl)pentyl ammonium chloride on cyclopolymerization in aqueous medium using t-butyl hydroperoxide as free radical initiator gave the corresponding homopolymer. The copolymer of this quaternary ammonium monomer with sulfur dioxide was prepared in DMSO using ammonium persulfate as the initiator. The homopolymer and copolymer were converted to polybetaines by acidic hydrolysis of ester functionality present on the repeat unit. These polybetaines represent a new class of polymers since they possess a zwitterionic moiety as well as a free electrolytic ion pair on each repeat unit. They possess structural features common to polyampholytes and conventional polyelectrolytes. It is therefore of interest to determine what effect this special structural feature would have on their solubility and solution properties. A zwitterionic monomer 3-(N,N-diallyl-N-methoxycarbonyl pentyl) ammoniopropane-sulfonate was prepared and its free radical polymerization in aqueous medium using t-butyl hydroperoxide as the initiator gave a conventional polybetaine. A preliminary investigation of its solubility behavior suggested that this polybetaine possesses polyampholytic properties. H, C, DEPT, COSY and CHSHF NMR techniques were used extensively to elucidate the structures of these new monomers and polymers.
TOPICAL NAME USED AS SUBJECT
Polymers
Pure sciences
PERSONAL NAME - PRIMARY RESPONSIBILITY
M. M. Ali
ELECTRONIC LOCATION AND ACCESS
Electronic name
مطالعه متن کتاب p
[Thesis]
276903
a
Y
