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| 11. |
Photopolymerization of carbazolyloxiranes |
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Polymer International,
Volume 36,
Issue 1,
1995,
Page 81-85
Juozas V. Gražulevičius,
Rimtautus Kavaliūnas,
Rūta Lazauskaitė,
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摘要:
AbstractPhotopolymerizations of 1‐allyloxy‐3‐(carbazol‐9‐yl)‐2‐propanol glycidyl ether and 1‐(carbazol‐9‐yl)‐4‐oxa‐2‐pentanol glycidyl ether with diaryliodonium salts in solution and in bulk are reported. These reactions give oligomers of degree of polymerization 4–6. The influence of the functional groups of the monomers on the rate of polymerization, conversion limit and molecular weight is discussed. The effects of photoinitiator and reaction media on these f
ISSN:0959-8103
DOI:10.1002/pi.1995.210360111
出版商:John Wiley&Sons, Ltd.
年代:1995
数据来源: WILEY
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| 12. |
Synthesis of ultra‐high molecular weight polyacrylonitrile with highly isotactic content (mm>0.60) using dialkylmagnesium/polyhydric alcohol system as catalyst |
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Polymer International,
Volume 36,
Issue 1,
1995,
Page 87-99
Yasuhiro Nakano,
Kunio Hisatani,
Kenji Kamide,
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摘要:
AbstractAn attempt was made to synthesize a catalyst having high activity for synthesis of highly isotactic polyacrylonitrile (PAN) with high molecular weight by anionic polymerization. The reaction products of di‐n‐hexylmagnesium [(n‐C6H13)2Mg] with alicyclic alcohols such as 1,4‐cyclohexanediol or 1,5‐decalindiol were found to be effective as polymerization catalysts for preparation of PAN samples whose triad isotacticity [the content ofmm (m,mesoconfiguration)] is about 0.64 and viscosity‐average molecular weight (Mv) exceeds 1 × 105. The triad tacticities [mm,mr, andrrcontents (r,racemoconfiguration)] of the polymers obtained were analysed by13C NMR and theirMvs were determined by viscometry in dimethylsulphoxide at 25°C using Kamideet al.'s Mark–Houwink–Sakurada equation.Mvof PAN increased significantly by after‐treatment of the catalysts, prepared from (n‐C6H13)2Mg and alicyclic alcohols, with triethylalyminium (Et3Al). Ultra‐high molecular weight PAN samples ranging inMvfrom 2 × 106to 6 × 106[(mm) = 0.57–0.66] were obtained in anisole at 135°C by using the above catalyst system. A main role of Et3Al in these catalyst systems is considered to reduce, in advance, OH groups on the catalyst, resulting in a significant suppression of termination reactions of propagating PAN chai
ISSN:0959-8103
DOI:10.1002/pi.1995.210360112
出版商:John Wiley&Sons, Ltd.
年代:1995
数据来源: WILEY
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| 13. |
Cellulose: structure, accessibility and reactivity, edited by H. A. Krassig. Gordon&Breach, Pennsylvania, 1993. Pp. xvi + 376, price £169.00, US$260.00. ISBN 2‐88124‐798‐9 |
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Polymer International,
Volume 36,
Issue 1,
1995,
Page 101-101
J. F. Kennedy,
W. H. W. Hasamudin,
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ISSN:0959-8103
DOI:10.1002/pi.1995.210360114
出版商:John Wiley&Sons, Ltd.
年代:1995
数据来源: WILEY
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| 14. |
Polymeric gas separation membranes, by R. E. Kesting and A. K. Fritzsche. Wiley Interscience, New York, 1993. Pp. xi + 416, price £49.60, US$68.95. ISBN 0‐471‐56931‐3 |
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Polymer International,
Volume 36,
Issue 1,
1995,
Page 102-102
C. Pritchard,
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ISSN:0959-8103
DOI:10.1002/pi.1995.210360116
出版商:John Wiley&Sons, Ltd.
年代:1995
数据来源: WILEY
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