A new approach for estimating the recrystallization rate and equilibrium melting temperature

Kim, Hong Gyun; Robertson, Richard E.

doi:10.1002/(sici)1099-0488(19980115)36:1<133::aid-polb15>3.0.co;2-d

Cited by 38 publications

(17 citation statements)

References 8 publications

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“…Sauer et al showed that the PET crystallized at low temperatures becomes liquid-like considering its viscosity at relatively low melting temperatures [62]. Robertson et al [63] showed that recrystallization is~2 orders of magnitude faster than isothermal crystallization at the same temperature using special temperature sequences in DSC experiments for PBT. To exclusively study the melting of the originally present crystals in a polymer sample consequently requires very high heating rates.…”

Section: Scanning Calorimetersupporting

confidence: 90%

Chip calorimetry for fast cooling and thin films: a review

et al. 2009

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Here we review on the thin-film chip calorimeter with controllable cooling as well as heating rates up to 10 6 K$s -1 developed in the last 5 years at the Institute of Physics, Rostock University. The calorimeter has been successfully used for fast thermal processing and simultaneous calorimetric measurements of many polymer samples, the physical properties of which are generally dependent strongly on their thermal history. Besides, owing to the very small addenda heat capacity, the calorimeter is very sensitive to study samples of only several tenths of nanograms. With differential alternating current (AC) design, the sensitivity of the calorimeter increased to a few tenths of pico-Joules per Kelvin. Therefore, it can be used to study glass transition of polymers confined in ultra-thin films down to several nanometers thickness. After the discussion of the strategy to realize fast cooling, we describe the static and dynamic thermal properties of the sensors used for the setup of the calorimeter. Finally, we present examples to show the performance of the calorimeter in different measurement modes.

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Section: Scanning Calorimetersupporting

confidence: 90%

Chip calorimetry for fast cooling and thin films: a review

et al. 2009

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“…The extensive recrystallization that took place during slow heating resulted in the formation of a sharp melting peak, which can be attributed to the melting of crystals with higher perfection, compared to the ones that were formed very fast, when the sample was heated with 10,000 K/s. These results are in accordance with other polyesters studied with fast scanning calorimetry, such as PET [22] and PBT [26]. …”

Section: Isothermal Nucleation and Crystallizationmentioning

confidence: 99%

“…7, 7 and 6 ng for PBSu, PBSu/MWCNTs and PBSu/Ag, respectively. The temperature signal of the thermopile of the sensor was calibrated by the melting temperatures of indium according to the recommendations of GEFTA [25] and DIN SPEC 91127 [26]. The coolant that was used during the measurements was liquid nitrogen, which allowed controlled cooling and heating below the glass transition of PBSu, which was about 241 K and above the melting temperature which was 406 K, at rates up to 70,000 K/s.…”

Section: Dfsc Sample Preparationmentioning

confidence: 99%

Kinetics of nucleation and crystallization in poly(butylene succinate) nanocomposites

Papageorgiou

Zhuravlev

Papageorgiou

et al. 2014

Polymer

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“…Some authors like Kim et al, [39] and Khanna et al, [40] have attributed this behavior, named "sub-T m " exotherm, to partial melting and recrystallization during the heating run. Some other explanations have been oriented toward an energy relaxation process, which stored during processing.…”

Section: Methodsmentioning

confidence: 99%