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Journal of Polymer Science Part C: Polymer Letters最新文献

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Polymer association in styrene-acrylic acid copolymers 苯乙烯-丙烯酸共聚物中的聚合物缔合
Journal of Polymer Science Part C: Polymer Letters
Pub Date : 1990-10-01 DOI: 10.1002/pol.1990.140281101
L. F. Wang, Eli M. Pearce, T. K. Kwei
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引用次数: 12
Polymerization of n-butyl isocyanate by pruitt-baggett adduct pruitt-baggett加合物聚合异氰酸酯正丁酯
Journal of Polymer Science Part C: Polymer Letters
Pub Date : 1990-10-01 DOI: 10.1002/pol.1990.140281104
Osman Yilmaz, Ali Usanmaz, Kemal Alyürük
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引用次数: 4
New thermotropic polyesters from distyrylbenzene bisphenols 由二苯乙烯基苯双酚合成的新型热致性聚酯
Journal of Polymer Science Part C: Polymer Letters
Pub Date : 1990-10-01 DOI: 10.1002/pol.1990.140281103
T. E. Mates, C. K. Ober

New main-chain thermotropic liquid crystalline (lc) polymers based on four derivatives of 4,4′- (p-phenylenedi-1,2-ethenediyl)bisphenol have heen prepared by Schotten-Baumen polymerization. Fusibility and solubility were achieved through the incorporation of side groups and flexible methylene spacers. Both a model ester and polymers based on the unsubstituted bisphenol were thermotropic, but had melting points in the vicinity of decomposition. Methyl, methoxy, and ethoxy side groups were used to lower the melting transition. The liquid-crystallinity was investigated with polarized light microscopy, differential scanning calorimetry, and X-ray diffraction. Methyl substitution provided the model compound and polymers with the greatest number of mesophases. Chemical structure was analyzed by infrared and UV/visible spectroscopy, 1H NMR, and elemental analysis of monomers and model compounds. Intrinsic viscosities were measured in N-methylpyrrolidone (nmp) solution.

以4，4′-（对苯二-1，2-乙烯基）双酚的四种衍生物为原料，采用Schotten-Baumen聚合法制备了新型主链热致液晶聚合物。通过引入侧基和柔性亚甲基间隔物实现了熔融性和溶解性。模型酯和基于未取代双酚的聚合物都是热致的，但熔点在分解附近。甲基、甲氧基和乙氧基侧基用于降低熔融转变。用偏光显微镜、差示扫描量热法和X射线衍射法研究了液晶性。甲基取代为模型化合物和聚合物提供了最大数量的中间相。通过红外和紫外/可见光谱、1H NMR以及单体和模型化合物的元素分析来分析化学结构。在N-甲基吡咯烷酮（nmp）溶液中测量特性粘度。
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引用次数: 3
Synthetic organic electrochemistry, Albert J. Fry, John Wiley & Sons, New York 合成有机电化学，Albert J.Fry，John Wiley&Sons，纽约
Journal of Polymer Science Part C: Polymer Letters
Pub Date : 1990-09-01 DOI: 10.1002/pol.1990.140281004
Frantibk Ligka
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引用次数: 0
Droplet separation, by Armin Burkholz, VCH, New York, 1990. 229 pp. 《液滴分离》，Armin Burkholz著，VCH，纽约，1990年。229页。
Journal of Polymer Science Part C: Polymer Letters
Pub Date : 1990-09-01 DOI: 10.1002/pol.1990.140281005
D. Feldman
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引用次数: 0
Evaluation of reactivity ratio of acrylate copolymers by 13C-NMR 用13C-NMR评价丙烯酸酯共聚物的反应率
Journal of Polymer Science Part C: Polymer Letters
Pub Date : 1990-09-01 DOI: 10.1002/pol.1990.140281003
D. Mohan, Ganga Radhakrishnan, S. Rajadurai, K. Thomas Joseph

Copolymers of 2-hydroxyethylmethacrylate (HEMA) and glycidylmethacrylate (GMA) are useful for contact lenses. Copolymerization of HEMA and GMA was carried out in dimethylformamide medium using benzoylperoxide as initiator at 60°C. The composition of HEMA and GMA in copolymers was estimated using 13C-NMR. The reactivity ratio of HEMA and GMA was found to be r = 0.73 and r2 = 0.98 by Finemann-Ross method and r1 = 0.74 and r2= 1.00 by Kelen-Tudos methods. The experimental values are in close agreement with theoretical value determined from Q-e scheme.

甲基丙烯酸2-羟基乙酯（HEMA）和甲基丙烯酸缩水甘油酯（GMA）的共聚物可用于隐形眼镜。HEMA和GMA的共聚在二甲基甲酰胺介质中进行，使用过氧化苯甲酰作为引发剂，在60°C下进行。使用13C-NMR估计共聚物中HEMA和GMA的组成。通过Finemann-Ross方法发现HEMA和GMA的反应性比率为r＝0.73和r2＝0.98，通过Kelen-Tudos方法发现r1＝0.74和r2＝1.00。实验值与Q-e格式的理论值基本一致。
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引用次数: 9
A synthesis for SF5 substituted fluorocarbon polymers SF5取代氟碳聚合物的合成
Journal of Polymer Science Part C: Polymer Letters
Pub Date : 1990-09-01 DOI: 10.1002/pol.1990.140281001
H. Kawa, S. N. Partovi, B. J. Ziegler, R. J. Lagow

Synthesis of both hydrocarbon and perfluorocarbon vinyl polymers containing the SF5 group have been accomplished by the reaction of elemental fluorine with poly (S-vinyl-O-t-butylthiocar bonate(. The resulting linear polymers have pendant SF5 groups with similar structures to polytetrafluoroethylene and polyethylene.

含有SF5基团的碳氢化合物和全氟碳乙烯基聚合物的合成是通过元素氟与聚（S-乙烯基-O-叔丁基硫代碳酸酯）的反应来完成的。所得线性聚合物具有与聚四氟乙烯和聚乙烯结构相似的SF5侧基。
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引用次数: 3
Variable temperature spin-lattice relaxation in the study of the local chain dynamics of polyurethane elastomers 聚氨酯弹性体局域链动力学研究中的变温自旋晶格弛豫
Journal of Polymer Science Part C: Polymer Letters
Pub Date : 1990-09-01 DOI: 10.1002/pol.1990.140281002
J. J. Marcinko, A. A. Parker, Y. T. Shieh, W. M. Ritchey
Deux prepolymeres constitues de poly(tetramethyleneglycol) termines par des motifs diisocyanatotoluene et les polyurethannes obtenus par reaction avec la 4,4'-methylene bis-(2-chloroaniline) sont etudies
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引用次数: 0
Epoxidation of unsaturated polymers with hydrogen peroxide 过氧化氢对不饱和聚合物的环氧化反应
Journal of Polymer Science Part C: Polymer Letters
Pub Date : 1990-08-01 DOI: 10.1002/pol.1990.140280903
Xigao Jian, Allan S. Hay
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引用次数: 21
Organotin chemistry, Iwao Omae, Elsevier, New York, 1989,355 pp. 有机锡化学，Iwao Omae，爱思唯尔，纽约，1989355页。
Journal of Polymer Science Part C: Polymer Letters
Pub Date : 1990-08-01 DOI: 10.1002/pol.1990.140280905
František Liška
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引用次数: 1
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