Melting kinetics of it-polypropylene crystals over wide heating rates

Toda, Akihiko; Taguchi, Ken; Sato, Kano; Nozaki, Koji; Maruyama, Masanori; Tagashira, Katsuharu; Konishi, Misuzu

doi:10.1007/s10973-012-2914-1

Cited by 41 publications

(26 citation statements)

References 12 publications

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“…However, their modified Hoffman–Weeks extrapolations cannot explain the present result of Equation . A similar behavior was reported for some polymers such as PA6, iPP, PEEK, PBT, PCL, poly(butylene succinate), and poly(vinylidene difluoride) . Here, according to the Gibbs–Thomson equation, T ZEP is related to the lamellar thickness.…”

Section: Resultssupporting

confidence: 76%

Crystallization/Melting Kinetics and Morphological Analysis of Polyphenylene Sulfide

Furushima

Nakada

Yoshida

et al. 2017

Macro Chemistry & Physics

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Crystallization and melting kinetics of polyphenylene sulfide (PPS) are determined using fast scanning calorimetry. The temperature dependence of half‐time crystallization of isothermally melt‐crystallized PPS shows a downward convex curve with a minimum at 160 °C. The minimum crystallization half‐time is about 3 s. The analysis of heating rate dependence of the melting temperature reveals a zero‐entropy‐production melting temperature of the sample. The microstructure of the sample, which is prepared by fast scanning calorimetry, is investigated by small‐angle X‐ray scattering and polarizing optical microscopy. The crystallinity and lamellar thickness of the sample annealed for 400 s decrease with decreasing crystallization temperature. The size of spherulites becomes small as the isothermal temperature is decreased. Transcrystalline morphology is observed near the surface between the sample and nitrogen gas at a crystallization temperature of 120 °C. The thickness of the transcrystalline layer disappears as the isothermal temperature is increased.

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Section: Resultssupporting

confidence: 76%

Crystallization/Melting Kinetics and Morphological Analysis of Polyphenylene Sulfide

Furushima

Nakada

Yoshida

et al. 2017

Macro Chemistry & Physics

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“…The fractional power dependence less than 0.5 has been experimentally confirmed by conventional DSC [8,[17][18][19][20][21][22] and fast-scan nanocalorimetry [23][24][25][26] for a number of polymers; for well annealed PE crystals, z ∼ 0.35 was reported [21]. It is noted with the fast-scan nanocalorimetry in Refs.…”

Section: Influences On the Melting Of Polymer Crystalssupporting

confidence: 54%

Reprint of “An evaluation of thermal lags of fast-scan microchip DSC with polymer film samples”

Toda

Konishi²

2015

Thermochimica Acta

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“…4 Nevertheless, the temperature range for direct isothermal crystallization studies using conventional calorimeters is, for most polymers, limited to regions close to the melting temperature, where crystallization is reasonably slow. 9 FSC has in the past been proven successful to achieve the goal for polyamide (PA), 11 poly ether ether ketone (PEEK), 12 polyethylene (PE), [13][14][15] poly (ethylene terephthalate) (PET), 16,17 isotactic polypropylene (iPP), [18][19][20][21] isotactic polystyrene (iPS), 22 poly L-lactic acid (PLLA), 23 PBT, [24][25][26][27] or poly (E2caprolactone) (PCL), [28][29][30][31] to name a few. Fast scanning calorimetry (FSC) is a powerful method to overcome this limitation and to investigate nucleation and crystal growth kinetics without unwanted crystallization during cooling.…”

Section: Introductionmentioning

confidence: 99%

Crystallization kinetics of poly(butylene terephthalate) and its talc composites

Furushima¹,

Kumazawa

Umetsu

et al. 2017

J of Applied Polymer Sci

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Crystallization kinetics of poly (butylene terephthalate) (non-talc-PBT) and its 0.1 wt % talc composites (talc-PBT) was determined for a wide range of cooling rates and isothermal temperatures. The critical cooling rate to suppress crystallization is 2000 K s 21 for non-talc-PBT and 7000 K s 21 for talc-PBT. The cooling rate dependence of the total enthalpy change and heating rate dependence of enthalpy of cold crystallization are quantitatively discussed on the basis of the Ozawa's method. For isothermal crystallization, the annealing-temperature (T iso ) dependence of crystallization half-time (t 1/2 ) shows a bimodal curve with two minima. Talc shortens the t 1/2 at T iso above 340 K and acts as a heterogeneous nucleation agent. Tammann's approach revealed that the t 1/2 is shortened by pre-nucleation for non-talc-PBT but not for talc-PBT.

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Melting kinetics of it-polypropylene crystals over wide heating rates

Cited by 41 publications

References 12 publications

Crystallization/Melting Kinetics and Morphological Analysis of Polyphenylene Sulfide

Crystallization/Melting Kinetics and Morphological Analysis of Polyphenylene Sulfide

Reprint of “An evaluation of thermal lags of fast-scan microchip DSC with polymer film samples”

Crystallization kinetics of poly(butylene terephthalate) and its talc composites

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