Kalorimetrische Messungen der Kristallisations-und Schmelzvorgänge an Polymeren
@article{Mller2007KalorimetrischeMD, title={Kalorimetrische Messungen der Kristallisations-und Schmelzvorg{\"a}nge an Polymeren}, author={F. Horst M{\"u}ller and Horst Martin}, journal={Journal of Polymer Science Part C: Polymer Symposia}, year={2007}, volume={6}, pages={83-91} }
Crystallizing and melting of polymers as a function of sample history is investigated by means of a differential thermal analytic method developed for quantitative evaluation. Crystallization and the subsequent melting of the same polymer occur at temperatures differing by 12 to 18°C. The melt temperature and the time of keeping the sample in the molten state, the cooling rate and the course of cooling have a reproducible effect on the subsequent melting. The crystallization is followed at…
One Citation
Rheological and thermal degradation properties of hyperbranched polyisoprene prepared by anionic polymerization
- Materials ScienceRoyal Society Open Science
- 2019
The hyperbranched polyisoprene decomposed via multistep mechanism as manifested by the nonlinear relationship between α and Ea while the linear polymer exhibited a decline in Ea at higher conversions.
References
SHOWING 1-10 OF 15 REFERENCES
Crystallization Kinetics in High Polymers. II. Polymer‐Diluent Mixtures
- Materials Science
- 1955
The rates of crystallization of two polymer‐diluent mixtures, poly‐(ethylene oxide)‐diphenyl ether and poly‐(decamethylene adipate)‐dimethyl formamide were studied at various temperatures ranging…
Isothermal Crystallization Kinetics of Polyethylene. III. Influence of the Sample Preparation
- Materials Science
- 1961
Isothermal crystallization in bulk has been compared dilatometrically with linear polyethylene samples which have been molded in different ways, including melt orientation and sintering of…
Crystallization Kinetics in High Polymers. I. Bulk Polymers
- Materials Science
- 1954
The rates of crystallization of five polymers, poly‐(ethylene oxide), poly‐(decamethylene adipate), and three poly‐(N,N′‐sebacoyl piperazine)'s differing in molecular weight, have been observed…
Theory of Formation of Polymer Crystals with Folded Chains in Dilute Solution
- Materials ScienceJournal of research of the National Bureau of Standards. Section A, Physics and chemistry
- 1960
The theory given for loop nuclei is both general and precise enough at the critical points to suggest that, on crystallization from sufficiently dilute solution, crystals of a definite step height are commonly to be expected for other crystallizable linear polymers than polyethylene, provided loop formation is sterically possible.
Kinetics of Phase Change. I General Theory
- Materials Science
- 1939
The theory of the kinetics of phase change is developed with the experimentally supported assumptions that the new phase is nucleated by germ nuclei which already exist in the old phase, and whose…
Neue Einblicke in den Ablauf der Kristallisation von Polymeren
- Chemistry
- 1960
ZusammenfassungBei dem Versuch, die hochpolymere Thixotropie an mit Isocyanat vernetzten Polyurethanen in weiterer Weise durch Messung der spezifischen Wärme zu analysieren, stellte sich heraus, daß…
Kinetics of Phase Change. II Transformation‐Time Relations for Random Distribution of Nuclei
- Materials Science
- 1940
Following upon the general theory in Part I, a considerable simplification is here introduced in the treatment of the case where the grain centers of the new phase are randomly distributed. Also, the…
Registrierende Messung des mechanischen Verlustes von Kunststoffproben
- 1963
ZusammenfassungEin neues Verfahren, das eine unmittelbare und kontinuierliche Registrierung des mechanischen Verlustwinkels über einen weiten Temperaturbereich ermöglicht, wird beschrieben. Die Probe…
Granulation, Phase Change, and Microstructure Kinetics of Phase Change. III
- Physics
- 1941
The theory of the preceding papers is generalized and the notation simplified. A cluster of molecules in a stable phase surrounded by an unstable phase is itself unstable until a critical size is…
Über die Veränderung in den kristallinen Bereichen bei Polymeren durch Deformation
- Physics
- 1963
ZusammenfassungKalorische Messungen an Polytetrafluoräthylen zeigen, daß sich Abschrecken aus der Schmelze und Kaltverstrecken auf Änderungen des Temperaturverlaufs der Enthalpiekurven in den…