ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1995-1999  (14)
  • 1975-1979  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Synthesis and properties of new AB-type semi-crystalline poly(ether imide)s (1999)
    Springer
    Polymer bulletin 43 (1999), S. 157-163 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Two AB-type poly(ether imide)s were prepared by one-pot polyimidization in N-methyl-2-pyrrolidone(NMP)/pyridine or N,N-dimethylacetamide(DMAc)/Et3N solution in the presence of triphenylphosphite(TPP) activator. The polymers were obtained with inherent viscosities of 1.16(5a) and 0.54(5b) dL/g and were highly thermostable up to at least 552°C with 5% weight loss. The polymers showed chemical resistance against chloroform even at higher temperature but could readily be dissolved in m-cresol and concentrated sulfuric acid. Wide-angle X-ray diffractograms revealed that the polymers were semi-crystalline.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002890050547
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Synthesis, characterization and properties of polyimides from 3,3′,4,4′-benzophenonetetracarboxylic dianhydride and imidazole-blocked 2,5-bis[(n-alkyloxy)methyl]-1,4-benzenediisocyanates (1995)
    Springer
    Polymer bulletin 35 (1995), S. 423-430 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary By the solution condensation of 3,3′,4,4′-benzophenonetetracarboxylic dianhydride (BTDA) with imidazole-blocked 2,5-bis[(n-alkyloxy)methyl]-1,4-benzenediisocyanates (Cm-BDIs) a series of aromatic polyimides (Cm-BP-PIs) having flexible (n-alkyoxy)methyl (-CH2O-n-CmH2m+1, m=4, 6, 8) side chains were prepared and characterized by IR- and 1H-NMR spectroscopy and their properties were measured and discussed in respect to the effects of side chains. Inherent viscosities of the polymers were in the 0.23–0.34 dL/g range. All the polymers were highly soluble in N,N′-dimethylpropyleneura(DMPU) and C6- and C8-BP-PIs even in CHCl3 at room temperature. UV-VIS spectra showed that the π-electrons are delocalized along the main chain. TGA studies showed a two-step pyrolysis behavior and in DSC Tg's of C4-, C6- and C8-BP-PIs were determined to be 184, 135 and 127 °C, respectively. Wide-angle X-ray diffractometry for as-polymerized samples revealed a quite low crystallinity with only loosely developed layered structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00297607
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of poly(dioxynaphthylene-1,4-dicarbonylnaphthylene)s with various isomeric naphthylene links (1995)
    Springer
    Polymer bulletin 35 (1995), S. 251-258 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Six all-naphthylene polyesters were prepared by the condensation of 1,4-naphthalenedicarboxylic acid (NA) chloride with 1,4-, 1,5-, 1,6-, 2,3-, 2,6-, and 2,7-naphthalenediol (ND) isomers and effects of the isomerism of NDs on structure and properties of the polyesters were investigated. The polymers-1,4,-1,5 and-2,6 with more or less linear ND link were insoluble and the others with bent ND link were soluble in the mixed solvent from phenol/p-chlorophenol/1,1,2,2-tetrachloroethane(TCE). The polymer-2,6 with the most linear ND link did not show a Tg and the highest decomposition initiation temperature(TD) and Tg's and TD's of the other polymers were only marginally dependent on their structures. The polymer-2,3 is believed to have a macrocyclic structure consisting of four to six monomer units and the polymer-1,6 is amorphous in its stable chain conformation, while all the other polymers are semicrystalline. The polymers-1,4and-1,5 exhibited an irreversible crystal-to-crystal transition at 380 and 320°C, respectively, whereas the polymer-2,6 a reversible one at 240°C. The polymer-2,7 exhibited an irreversible crystal-to-amorphous transition at 360°C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00963120
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of new AB-type poly(etherimide)s containing various naphthylene links (1998)
    Springer
    Polymer bulletin 41 (1998), S. 409-416 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary New aromatic AB-type poly(etherimide)s containing various naphthylene links were prepared by the self-condensation of [2-(3,4-dicarboxyphenyloxy)-3, 6 and 7-naphthyl]oxyanilines hydrochlorides and 5-(3,4-dicarboxyphenyl)oxy-1-naphthylamine hydrochloride. The polymerization performed in NMP/pyridine or DMAc/Et3N in the presence of triphenylphosphite(TPP) activator was found to proceed to imide bond formation. Inherent viscosities of the polymers were in the 0.39-0.94dL/g range. Properties of the poly(etherimide)s were investigated and discussed in terms of chain rigidity resulting from different naphthylene links. All the poly(etherimide)s were highly thermostable up to 600°C with 10% weight loss and showed chemical resistance against chloroform even at higher temperatures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002890050381
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Phase behaviour of poly(benzophenoneimide)s having n-alkyloxymethyl side chains (1997)
    Springer
    Polymer bulletin 38 (1997), S. 689-694 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract. A series of poly(benzophenoneimide)s (Cm-BP-PIs) having n-alkyloxymethyl side chains (−CH2O-n-CmH2m+1, m = 4, 6, 8) have been examined by X-ray diffraction, differential scanning calorimetry (DSC) and polarizing optical microscopy. The samples showed basically two phase transitions and both transition temperatures decreased with increasing side chain length. The first transitions were ascribed to glass transitions and the second ones were assigned to liquid crystal-to-isotropic transitions. Eicosane (n-C20H42) which is chemically very similar to the side chain was miscible with the side chains of C8-BP-PI, which induced depression of the glass transition temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002890050106
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of polyimides from 1,4-bis[4-(n-alkyloxy)phenyloxy]pyromellitic dianhydrides and 4,4'-oxydianiline (1998)
    Springer
    Polymer bulletin 40 (1998), S. 407-414 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary New pyromellitic dianhydrides having (n-alkyloxy)phenyloxy (-O-Ph-O-n-CmH2m+1, m=1,4,8,12) side chains were synthesized and polymerized with 4,4'-oxydianiline (ODA) in NMP at room temperature. Imidization was carried out using triethylamine and acetic anhydride. The synthesized polyimides (Cm-OPIs) were characterized and their properties were measured and discussed in respect to the effects of side chains. Inherent viscosities of the polymers were in the 0.46 – 0.68 dL/g range. All the polymers were highly soluble in N-methylpyrrolidinone (NMP) and slightly soluble in DMSO, m-cresol, DMF and concentrated H2SO4 at room temperature. TGA pyrograms showed two-step degradation. In DSC thermograms the polymers exhibited Tg's between 219°C and 305°C and melting points near 350°C were observed in C8- and C12-OPIs. Wide-angle X-ray diffractometry for as-polymerized samples revealed very low crystallinities and layered structures which were better developed in the polymers with longer side chains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002890050270
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Vernetzte polymere mit spaltbaren netzbrücken, 5.Part 4: cf. D. Braun, W. Brendlein, L. Pandjojo, Makromol. Chem. 178, 669 (1977). Homopolymerisation von 4-vinylbenzoesäureanhydrid (1977)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 178 (1977), S. 2515-2526 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The kinetics of the crosslinking homopolymerization of symmetrical diolefines with independent double bonds is described. Experiments are carried out with 4-vinylbenzoic anhydride. The experimental results are compared with the theory and the discrepancy is discussed.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1977.021780903
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of polyimides from imidazole-blocked 2,5-bis[(n-alkyloxy)methyl]-1,4-benzene diisocyanates and pyromellitic dianhydride (1996)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 34 (1996), S. 357-365 
    Details
    ISSN: 0887-624X
    Keywords: processable polyimides ; poly(pyromellitimide)s ; rigid-rod polyimides ; polyimides ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: From imidazole-blocked 2,5-bis[(n-alkyloxy)methyl]-1,4-benzene diisocyanates and pyromellitic dianhydride a series of new rigid-rod polyimides (Cn-PY-PI; n = 4, 6, 8) having linear and flexible (alkyloxy)methyl ((SINGLE BOND)CH2OCnH2n + 1; n = 4, 6, 8) side chains were prepared and characterized and their properties were measured and discussed with regard to effects of side chains. Incorporation of the side chains onto the rigid main chain greatly enhanced the solubility and fusibility of the polymers, and melting point of C8-PY-PI was determined to be 277°C. The UV-VIS absorption behavior was independent of side-chain length. TGA thermograms revealed a two-step pyrolysis behavior, in which the side chains split off separately at lower temperatures. X-ray diffractograms showed that all the polyimides are crystalline at room temperature. Sharp reflections in small-angle region obviously indicated the presence of a layered crystal structure. © 1996 John Wiley & Sons, Inc.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 9
    facet.materialart.
    Unknown
    Rotational conformational energetics of stiff aromatic polyimides: Effects of exchange repulsions, dipole-moiety interactions, and π-conjugations (1997)
    American Institute of Physics
    Details
    Publication Date: 1997-12-15
    Print ISSN: 0021-9606
    Electronic ISSN: 1089-7690
    Topics: Chemistry and Pharmacology , Physics
    Published by American Institute of Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 10
    facet.materialart.
    Unknown
    Synthesis and properties of new AB-type semi-crystalline poly(ether imide)s (1999)
    Springer
    Details
    Publication Date: 1999-12-15
    Print ISSN: 0170-0839
    Electronic ISSN: 1436-2449
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Springer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...