摘要:

AbstractStarting with 2,3,9,10,16,17,23,24‐phthalocyanineoctacarbonitrile (3a) different octa‐substituted phthalocyanines4a–7aand3b–7bwith carboxylic acid, anhydride, imido and amido groups were prepared. IR and UV/VIS spectra are discussed in detail and compared with unsubstituted phthalocyanine (1).3–7may be considered as low molecular weight analogues of polymeric phthalocyanines2with different e

ISSN:0025-116X    

DOI:10.1002/macp.1985.021861101

出版商:Hüthig&Wepf Verlag    

年代:1985

数据来源: WILEY

摘要:

AbstractStructurally uniform polymeric phthalocyanines5a–e, containing imido end groups, were synthesized by reaction of different derivatives of 1,2,4,5‐benzenetetracarboxylic acid,2a–d, with metal salts, urea and a catalyst.5a–ewere converted into polymers3,4and6, containing anhydride, carboxylic acid and amido end groups, respectively. IR and UV/VIS spectroscopy were used as appropriate methods for describing end groups and structural uniformity. It could be shown that the octasubstituted phthalocyanines7–10and not the phthalocyanine1must be considered as the low‐molecular‐weight analogues. The number of phthalocyanine units in the polymers was found to be ⩾ 9. The determination of the real molecular weights is not possible, due to the low solubility

ISSN:0025-116X    

DOI:10.1002/macp.1985.021861102

出版商:Hüthig&Wepf Verlag    

年代:1985

数据来源: WILEY

摘要:

AbstractPolymers3were prepared by reaction of 1,2,4,5‐benzenetetracarbonitrile (2) or 2,3,9,10,16,17,23,24‐(29H, 31H)‐phthalocyanineoctacarbonitrile (5a) with various metal salts or metals. The polymer structures were investigated by comparing their IR and UV/VIS spectra with those of5. Structurally uniform polymeric phthalocyanines3with a number of phthalocyanine unitsPc⩾ 8, containing only nitrile end groups, were obtained from2or5awith various copper salts. By saponification of3polymers (Pc⩾ 3) with carboxylic acid end groups were obtained. The reactions of2or5awith other metal salts or metals yielded polymers of varying structural uniformity. Metal free3awas also sy

ISSN:0025-116X    

DOI:10.1002/macp.1985.021861103

出版商:Hüthig&Wepf Verlag    

年代:1985

数据来源: WILEY

摘要:

AbstractThe thermal stabilities of structurally uniform polymeric phthalocyanines2and their lowmolecular‐weight model compounds5were examined. Thermal analyses under inert and oxidative conditions showed that the nature of the metal as well as that of the substituents and end groups has a decisive influence on the thermal stability. Polymers2turned out to be less stable as compared to their low‐molecular‐weight analogues5. Generally, the stability under inert conditions was found to be higher than under oxidative conditions. For polymer2b(Mt = Cu) it could be shown that 400°C must not be exceeded during its synthesis, whereas the polymer withstands isothermic temperatures of up to 500°C without decomp

ISSN:0025-116X    

DOI:10.1002/macp.1985.021861104

出版商:Hüthig&Wepf Verlag    

年代:1985

数据来源: WILEY

摘要:

AbstractThe electroinitiated anionic polymerization ofp‐diethynylbenzene was carried out in various solvents with different solvation capacity using various electrolytes. The latter were classified depending on their efficiency for the polymerization which was found to be in good agreement with polarographic measurements. IR and H NMR spectral analyses of the polymers obtained showed the formation of extended π‐conjugated systems with only one of the two acetylenic bonds having reacted, thus giving soluble products suitable for structural stu

ISSN:0025-116X    

DOI:10.1002/macp.1985.021861105

出版商:Hüthig&Wepf Verlag    

年代:1985

数据来源: WILEY

摘要:

AbstractThe systems comprising organoaluminium compounds, RAIX2(R – CH3, C2H5, i‐C4H9, X – R or CI), and strong organic electron acceptors like quinones, tetracyanoolefins and nitro compounds were tested as redox type initiators of methyl methacrylate, acrylonitrile and styrene homopolymerization. The initiating radicals are produced via a single electron transfer from organoaluminium compounds to the acceptor molecules, followed by homolytical cleavage of the aluminium‐carbon bond. In the systems studied also stable radicals derived from the acceptor molecule like salts of semiquinones or anion‐radicals of tetracyanoolefins are formed beside alkyl radicals. The structure of some paramagnetic products formed in the reactions between the nitro compounds and triethylaluminium was established by means of ESR. The activity of initiators is discussed in terms of the mechanisms of radical and polar reactions taking place in the systems studied and in terms of interactions between radicals and radical‐scavenge

ISSN:0025-116X    

DOI:10.1002/macp.1985.021861106

出版商:Hüthig&Wepf Verlag    

年代:1985

数据来源: WILEY

摘要:

AbstractSilica was compounded into the moisture‐curable rubber system of brominated butyl rubber (BIIR)/3‐aminopropyltriethoxysilane (APS). The compound was hot pressed and then cured in water at 70°C. The increment of network‐chain density (vs) by moisture‐curing became smaller in the presence of silica due to pre‐vulcanization during the hot pressing. The loading of silica did not simply increase the modulus of the moisture‐cured compound, since silica reacted with APS and reducedvs. An addition of tetraethoxysilane to the system was found to be effective to restore t

ISSN:0025-116X    

DOI:10.1002/macp.1985.021861107

出版商:Hüthig&Wepf Verlag    

年代:1985

数据来源: WILEY

摘要:

AbstractChlorosulfonated polyethylene (CSM) was grafted with 3‐aminopropyltriethoxysilane (APS) and the product was cured by exposing to moisture and by using dibutyltin dilaurate (DBTDL) as catalyst for condensation. The moisture‐cured product showed a tensile strength of 7,8 MPa when the amount of APS added was 0,5 equivalent to the amount of chlorosulfonyl groups. The rate constant of the reaction of CSM with APS was found to be 8,5 · 10−2l · mol−1· s−1at 100°C in toluene, which is 850 times higher than that of the reaction of chlorinated butyl rubber with APS. The activation energy and the frequency factor of the reaction were 89 kJ · mol−1and 2,0 · 1011l · mol−1· s−1, respectively. The activation energy of the moisture‐cure of APS‐grafted CSM was det

ISSN:0025-116X    

DOI:10.1002/macp.1985.021861108

出版商:Hüthig&Wepf Verlag    

年代:1985

数据来源: WILEY

摘要:

AbstractAnalysis of the1H NMR spectra of\documentclass{article}\pagestyle{empty}\begin{document}$ {\rm CH}_{\rm 3} \mathop {\rm C}\limits^ \oplus {\rm OSbF}_{\rm 6}^ \ominus $\end{document}/β‐propiolactone and of the model systems\documentclass{article}\pagestyle{empty}\begin{document}$ {\rm CH}_{\rm 3} \mathop {\rm C}\limits^ \oplus {\rm OSbF}_{\rm 6}^ \ominus $\end{document}/(CH3)2O and\documentclass{article}\pagestyle{empty}\begin{document}$ {\rm CH}_{\rm 3} \mathop {\rm C}\limits^ \oplus {\rm OSbF}_{\rm 6}^ \ominus $\end{document}/CH3COOCH3in liquid SO2in the temperature region −70 to −20°C revealed that the reaction of the acetylium cation with β‐propiolactone leads to the cyclic six‐membered oxonium ion4, participating as an intermediate in the initial stage of po

ISSN:0025-116X    

DOI:10.1002/macp.1985.021861109

出版商:Hüthig&Wepf Verlag    

年代:1985

数据来源: WILEY

摘要:

AbstractThe chains of poly(amido‐amine) (1) were grafted on the surface of two different polyurethanes (2and3), one of which being a commercial product. All the chemical steps of the grafting reaction were monitored by chemical analysis and FTIR spectroscopy. The poly(amido‐amine) was found to be able to form a complex with heparin by electrostatic interaction. The heparin can be totally removed by using a 0,1MNaOH solution. The heparin adsorbing capacity of the two resulting materials was biologically tested. A constant heparin/poly(amido‐amine) ratio, observed for both polyurethane samples, leads to the assumption that the complex formation reaction proceeds via a defined stoichio

ISSN:0025-116X    

DOI:10.1002/macp.1985.021861110

出版商:Hüthig&Wepf Verlag    

年代:1985

数据来源: WILEY