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  • 11
    Electronic Resource
    Electronic Resource
    Thermal behaviour of trimethoxy silane modified alkyl methacrylates (1989)
    Springer
    Journal of thermal analysis and calorimetry 35 (1989), S. 1251-1256 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Vorliegende Arbeit beschäftigt sich mit dem thermischen Verhalten von Äthylmethakrylat (EMA) und Bulhylmethakrylat (BMA), das mit Trimethoxysilan (MTS) modifiziert wurde. Unter Anwendung verschiedener Molverhältnisse von MTS und EMA bzw. BMA wurden einige Kopolymerproben hergestellt. Die Kopolymerisation wurde 120 Minuten lang bei 78 °C und mit Benzoylperpxid als Initiator durchgeführt. Der Einbau von MTS in Alkylmethakrylate führt zu einer Steigerung der thermischen Stabilität. Eine hydrolytische Vernetzung der Kopolymere mit größeren Molanteilen an MTS ergeben vernetzte Produkte mit verbesserter thermischer Stabilität.
    Abstract: Резюме Изучено термическое поведение этилметакрилата (ЭМА) и бутилметакрилата (Б МА), модифицированных тр иметоксисиданом (МТС). Путем изменения молярного соотношения МТС в ЭМА и БМА получен о несколько сополиме ров. Сополимеризация был а проведена при 78 °C в течении 120 мин, испол ьзуя в качестве иници атора реакции перекись бен зоила. Введение МТС в алкилметакрида ты приводит к уведиче нию их термрустрйчиврсти. Г идролитическое сшивание сополимера, содержащего брдее вы сокую мольную фракцию МТС, д ает продукт с лучшей термической у стойчивостью.
    Notes: Abstract The paper deals with the thermal behaviour of trimethoxy silane (MTS) modified ethyl methacrylate (EMA) and butyl methacrylate (BMA). Several copolymer samples were prepared by varying the molar ratio of MTS with respect to EMA or BMA. The copolymerisation was carried out at 78 °C for 120 min using benzoyl peroxide as an initiator. Incorporation of MTS in alkyl methacrylates resulted in an increase in thermal stability. Hydrolytic cross-linking of copolymer having higher mole fraction of MTS gave a cross-linked product with better thermal stability.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01913045
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  • 12
    Electronic Resource
    Electronic Resource
    Thermal Characterization of Vinyl Acetate—Ethylene Copolymers (1999)
    Springer
    Journal of thermal analysis and calorimetry 58 (1999), S. 509-515 
    Details
    ISSN: 1572-8943
    Keywords: copolymers ; emulsion polymerisation ; vinyl acetate-ethylene
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Copolymers of vinyl acetate and ethylene were prepared by emulsion polymerization using ammonium persulphate and sodium metabisulphite as initiators in presence of cyclohexane. Several copolymer samples were prepared by changing initial pressure of ethylene from 100 to 250 psi. The copolymer composition was determined by 1H-NMR and thermogravimetric analysis in nitrogen atmosphere.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010179822674
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  • 13
    Electronic Resource
    Electronic Resource
    Thermal Behaviour of Glycidyl Methacrylate Homopolymers and Copolymers (1999)
    Springer
    Journal of thermal analysis and calorimetry 58 (1999), S. 533-539 
    Details
    ISSN: 1572-8943
    Keywords: group transfer polymerisation ; H–H linkage ; molecular mass ; random chain scission ; weak linkages
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The paper describes the effect of molecular mass and copolymer composition on thermal behaviour of homopolymers and copolymers of glycidyl methacrylate and methyl methacrylate. The polymerisation was done by using group transfer polymerization (GTP) and free radical techniques. A multistep decomposition was observed in polymers prepared by free radical technique indicating the presence of weak linkages in the backbone. Copolymers prepared by GTP had fewer weak sites and degraded in single step by a random chain scission.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010136007653
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  • 14
    Electronic Resource
    Electronic Resource
    Thermal Behaviour of Polymers Based on Nadimides (2000)
    Springer
    Journal of thermal analysis and calorimetry 59 (2000), S. 531-539 
    Details
    ISSN: 1572-8943
    Keywords: carbocationic polymerization ; char yield ; N-aryl nadimides ; ring opening metathesis polymerization (ROMP) ; thermal stability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Carbocationic polymerization of N-ortho/meta/para tolyl-exo-norbornene dicarboximide (nadimide) was carried out using Pd(II) catalyst. Under similar conditions of polymerization, poly(N-m-tolyl nadimide) showed higher molecular mass compared to poly(N-p-tolyl nadimide) and poly(N-o-tolyl nadimide). Thermal stability of these polymers was evaluated by dynamic thermogravimetry in nitrogen atmosphere. The polymers were stable up to 460°C and lost mass above this temperature in a single step. The characteristic decomposition temperature and char yield of these polymers were higher than the polymers prepared by using ring opening metathesis polymerization. The difference has been attributed to the presence of rigid bicyclic ring structure in these polymers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010106028496
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  • 15
    Electronic Resource
    Electronic Resource
    Thermal degradation of poly(vinyl chloride) in the presence of additives - Part I (1978)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 71 (1978), S. 157-166 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Der Einfluß von Additiven (Maleinsäureanhydrid, p-Benzochinon, 9,10-Anthrachinon) auf die HCl-Abspaltungsgeschwindigkeit von PVC in Äthylbenzoat im Temperaturbereich zwischen 180° bis 210°C wird untersucht. Bei Temperaturen ab 200°C wird in Anwesenheit der Additive eine Verringerung der Geschwindigkeit beobachtet. Für diese Stabilisierung wird ein Mechanismus vorgeschlagen.
    Notes: The effect of additives (maleic anhydride, p-benzoquinone and 9,10-anthraquinone) on the rate of dehydrochlorination of PVC in ethyl benzoate was investigated at temperatures ranging from 180° to 210°C. A reduction in the rates was observed in presence of these additives at 200°C and above. A mechanism has been proposed to account for the stabilization effect.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1978.050710113
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  • 16
    Electronic Resource
    Electronic Resource
    Thermal behaviour of 2-hydroxyethyl methacrylate - methyl methacrylate- copolymers (1980)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 87 (1980), S. 75-85 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Copolymerisation von 2-Hydroxyethylmethacrylat mit Methylmethacrylat wurde in Substanz unter Stickstoffatmosphäre bei 70°C mit 0,2% Benzoylperoxid als Initiator durchgeführt. Zur Fraktionierung der Copolymeren wurde die Fällungsmethode angewandt. Die Fraktionen wurden mittels Viskositäts-, NMR-, IR-Messungen und Elementaranalyse charakterisiert. Das thermische Verhalten der verschiedenen Fraktionen wurde mit Hilfe der dynamischen Thermogravimetrie untersucht. Die thermische Stabilität von verschiedenen Fraktionen wurde nicht merklich durch die Änderung der Grenzviskosität beeinflußt.
    Notes: Copolymerization of 2-hydroxyethyl methacrylate (HEMA) with methyl methacrylate (MMA) was carried out in bulk in nitrogen atmosphere at 70°C using 0.2% benzoyl peroxide as initiator. Fractionation of the copolymers was done by precipitation method. The fractions were characterized by viscosity, NMR, IR and elemental analysis. Thermal behaviour of various fractions was investigated by dynamic thermogravimetry. Thermal stability of various fractions was not significantly influenced by the change in intrinsic viscosity.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1980.050870105
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  • 17
    Electronic Resource
    Electronic Resource
    Degradation of polypropylene. Effect of phosphorylated poly(2,6-dimethyl-1,4-phenylene oxide) (1984)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 127 (1984), S. 137-143 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Der Effekt von phosphoryliertem Poly-2,6-dimethyl-1,4-phenylenoxid (PPOP) auf den Photoabbau und die thermische Alterung von Polypropylen (PP) wurde untersucht. Es wurden Polypropylenproben mit Gehalten von 1 Gew.-% (B1) und 5 Gew.-% (B5) hergestellt. Das PPOP enthaltende Polypropylen zeigte bessere mechanische Eigenschaften nach Bestrahlung mit UV-Licht. Nach einer Bestrahlungsdauer von 100 h wurde eine Rest-Zugspannung von 61% gefunden, im Gegensatz zu 9% bei reinem PP. Der Sauerstoffindex von PP wurde durch Mischen mit PPOP nicht beeinflußt. Der Effekt der thermischen Alterung bei 125°C auf die mechanischen Eigenschaften von PP, B1 und B5 wurde ebenfalls untersucht.
    Notes: The effect of phosphorylated poly(2,6-dimethyl-1,4-phenylene oxide) (PPOP) on the photodegradation and thermal ageing of polypropylene (PP) was investigated. Samples of PP containing 1% and 5% (w/w) of PPOP were prepared (designated as B1 and B5, respectively). Polypropylene containing PPOP showed better retention of mechanical properties after irradiation with UV-light. After 100 h irradiation, 61% retention in yield stress was observed against 9% in case of PP. The limiting oxygen index of PP was unaffected when blended with PPOP. The effect of thermal ageing at 125°C on the mechanical properties of PP, B1 and B5 was also studied.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1984.051270112
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  • 18
    Electronic Resource
    Electronic Resource
    4,4′-carbo(4,4′-bismaleimido phenoxy)diphenyl silane: Synthesis and characterization (1989)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 168 (1989), S. 217-223 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The paper describes the successful synthesis of silicon containing bismaleimide resin 4,4′-carbo(4,4′-bismaleimido phenoxy)diphenyl silane. The char yield of the bismaleimide resin in N2 atmosphere was found to be 55% at 800°C. Chain extension of bismaleimide with 4,4′-diamino diphenyl sulfone reduced the char yield and thermal stability.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1989.051680118
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  • 19
    Electronic Resource
    Electronic Resource
    Effect of α-methyl styrene on curing behaviour and interfacial properties of glass fibre-reinforced vinyl ester resins (1993)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 212 (1993), S. 67-75 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Härtungseigenschaften des Bismethacrylat-Derivates von Bisphenol-A-diglycidylether (VE-Harz) mit Styrol und α-Methylstyrol (MS) als Reaktivverdünner wurden untersucht. Ein zunehmender Gehalt an MS verzögerte die Härtung. Mit Glasfasermatten, die teilweise mit γ-Methacryloyloxyropyl-trimethoxysilan (MTS) behandelt waren, wurden Composites hergestellt, deren Grenzflächen-Scherspannung mit der Ein-Faser-Methode gemessen wurde. Die Beschichtung mit MTS verbesserte die Grenzflächen-Scherspannung der Composites um ca. 30-50%. Ein MS-Gehalt von bis zu 5 Gew.-% MS hatte keinen Einfluß auf die interlaminare Scherfestigkeit (ILSS), weder bei den glasfaserverstärkten Composites noch bei den Ein-Faser-Proben. Eine Erhöhung des MS-Anteils auf 15 Gew.-% verbesserte sowohl die ILSS als auch die Biegesteifigkeit und die Biegefestigkeit.
    Notes: The curing behaviour of bismethacryloyl derivative of diglycidyl ether of bisphenol A (vinyl ester VE resin) containing styrene and α-methyl styrene (MS) as reactive diluents was studied. Delayed curing was observed in samples containing increasing proportions of MS. Interfacial shear stress of untreated as well as γ-methacryloyloxy-propyl trimethoxy silane (MTS) treated, glass fibre-reinforced VE resin composites were measured by single fibre technique. In comparison to untreated glass fibres, a 30 - 50% increase in interfacial shear stress was observed in composites based on MTS treated glass fibres. Addition of up to 5 wt.-% MS to VE resin did not affect the interfacial shear strength (ILSS). This behaviour was observed by using ILSS measurement of both glass fabric-reinforced composites as well as single fibre specimens. Further increase in MS to 15 wt.-% resulted in an increase in ILSS and bending stiffness as well as flexural strength.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1993.052120107
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  • 20
    Electronic Resource
    Electronic Resource
    Thermal degradation of polyvinyl chloride in phenolic solvents I (1969)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 7 (1969), S. 29-38 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Chlorwasserstoffabspaltung am Polyvinylchlorid wurde in phenolischen Lösungsmitteln unter Stickstoffatmosphäre im Bereich von 137° bis 206°C untersucht. Phenol, o-Cresol, Methyl-, Äthyl-, Amyl- und Phenylsalizylat wurden als Lösungsmittel verwendet. In Phenol war die Reaktion schnell und in Amylsalizylat langsam. Mit zunehmender Größe des Alkylrestes im Salizylat nahm die Geschwindigkeit der Abspaltung des Chlorwasserstoffs ab. In Amylsalizylat war die Aktivierunsenergie niedriger (26 Kcal/mol) als in o-Cresol (29 Kcal/mol) bei den anderen Lösungsmitteln lagen die Werte dazwischen. Die Ergebnisse lassen sich durch die unterschiedliche Aktivität des phenolischen Wasserstoffs und die sterische Hinderung der verschiedenen Lsöungsmittel erklären.
    Notes: The thermal degradation of polyvinyl chloride in phenolic solvents has been investigated in an atmosphere of nitrogen in the temperature range 137-206°C. The solvents used were phenol, o-cresol, methyl, ethyl, amyl, and phenyl salicylates. The reaction was fast in phenol and slow in amyl salicylate. The rate of dehydrochlorination decreased with increasing size of the alkyl side chain in salicylates. The activation energy was low in amyl salicylate (26 kcal/mole) and high in o-cresol (29 kcal/mole), and for other solvents it was in between these two values. The results have been explained as being due to the variation in the reactivity of phenolic hydrogen and to steric factors of the various substituents.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1969.050070103
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