Nonisothermal crystallization kinetics and spherulite morphology of poly(trimethylene terephthalate)

Xue, Ming; Sheng, Jing; Yu, Yingfeng; Chuah, Hoe H.

doi:10.1016/j.eurpolymj.2003.12.009

Cited by 70 publications

(40 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, Ho, et al [3], Wu, et al [4], Hong et al [12], and Chuang, et al [13] shared similar results in that the banded structure could only be obtained at T c = 195-215 • C. Xue, et al [43] reported banded spherulites formation at T c = 170-195 • C. Wang, et al [3] found the lower and upper limitations of T c for banded spherulite formation are 135 • C and 165 • C, respectively. Rosenthal, et al [9] reported that the achiral PTT lamellae inverted their chirality at a certain crystallization temperature, separating the banded spherulites at lower temperature region from those at higher temperature region.…”

Section: The Effect Of Sample Thicknesssupporting

confidence: 54%

“…For example, Ho, et al [3], Wu, et al [4], Hong et al [12], and Chuang, et al [13] shared similar results in that the banded structure could only be obtained at Tc = 195-215 °C. Xue, et al [43] reported banded spherulites formation at Tc = 170-195 °C. Wang, et al [3] found the lower and upper limitations of Tc for banded spherulite formation are 135 °C and 165 °C, respectively.…”

Section: Figure 1 Crystallization Kinetics and The Related Morphologmentioning

confidence: 99%

See 1 more Smart Citation

Interior Lamellar Assembly and Optical Birefringence in Poly(trimethylene terephthalate) Spherulites: Mechanisms from Past to Present

2017

View full text Add to dashboard Cite

Poly(trimethylene terephthalate) (PTT) with its unique spherulitic morphologies, highly birefringent features, and crystal stability serves as a good candidate to study polymer crystallization and assembly. This review compiles the main findings on crystallization in PTT, including birefringence and morphology, thermal behavior, as well as the interior structure of PTT banded spherulites, in order to elucidate the origin and formation mechanism of banded spherulites. Interior observation through the inner anatomy of crystal assembly in banded spherulites hidden under the top surface is necessary to provide a complete picture for the unsettled arguments about formation mechanism. Careful attention should be taken when selecting the etching agent for exposing the lamellar structure of polymer spherulite, otherwise, misinterpretation could result.

show abstract

Section: The Effect Of Sample Thicknesssupporting

confidence: 54%

Section: Figure 1 Crystallization Kinetics and The Related Morphologmentioning

confidence: 99%

Interior Lamellar Assembly and Optical Birefringence in Poly(trimethylene terephthalate) Spherulites: Mechanisms from Past to Present

2017

View full text Add to dashboard Cite

show abstract

“…During this cooling process PTT may crystallize. 34 The presence of these dendritic structures on excimer-irradiated polymers has already been reported in PET 35 and is in agreement with surface crystallization studies in polymer monolayers. 36,37 The existence of this morphology has been theoretically explained by the fact that in nonequilibrium polymer crystals there is a competition between ordering of individual chains in the crystalline phase and accommodation of incoming comparatively disordered chains at the growth front.…”

Section: ■ Results and Discussionsupporting

confidence: 86%

Nanostructuring Thin Polymer Films with Optical Near Fields

Martín-Fabiani

Siegel

Riedel

et al. 2013

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

ABSTRACT:In the present work, we report on the application of optical near fields to nanostructuring of poly(trimethylene terephthalate) (PTT) thin films. By exposure to a single ultraviolet nanosecond laser pulse, the spatial intensity modulation of the near-field distribution created by a silica microsphere is imprinted into the films. Setting different angles of incidence of the laser, elliptical or circular periodic ring patterns can be produced with periods as small as half the laser wavelength used. These highly complex patterns show optical and topographical contrast and can be characterized by optical microscopy (OM) and atomic force microscopy (AFM). We demonstrate the key role of the laser wavelength and coherence length in achieving smooth, extended patterns in PTT by using excimer laser (193 nm) and Nd:YAG laser (266 nm) pulses. Reference experiments performed in Ge 2 Sb 2 Te 5 (GST) demonstrate that nanopatterning in PTT is triggered by ablation as opposed to GST, in which nanopatterning originates from laser-induced phase change, accompanied by a small topographical contrast. The experiments presented in this work demonstrate the suitability of optical near fields for structuring polymer films, opening up new possibilities for nanopatterning and paving the way for potential applications where optical near fields and polymer nanostructures are involved.

show abstract

“…n in the range of 3.0-3.3 indicates a three-dimensional growth mechanism with a combination of thermal and athermal nucleation (resulting in the fractional n values observed). 25,26 With increasing temperature, the values of n increase gradually from 3.1 to 3.3 for B2 and from 3.0 to 3.2 for B3. The temperature dependence of n, within the nucleation-controlled region, should be such that n increases with increasing T c .…”

Section: -24mentioning

confidence: 94%

Isothermal‐crystallization kinetics and melting behavior of crystalline/crystalline blends of poly(trimethylene terephthalate) and poly(ethylene 2,6‐naphthalate)

Run

Wang

Yao

et al. 2006

J of Applied Polymer Sci

View full text Add to dashboard Cite

ABSTRACT:The isothermal crystallization and crystal morphology of poly(trimethylene terephthalate) (PTT)/poly (ethylene 2,6-naphthalate) (PEN) blends were investigated with differential scanning calorimetry and polarized optical microscopy. The commonly used Avrami equation was used to fit the primary stage of isothermal crystallization. The Avrami exponents were evaluated to be in the range of 3.0-3.3 for isothermal crystallization. The subsequent melting endotherms of the blends after isothermal crystallization showed multiple melting peaks. The crystallization activation energies of the blends with 20 or 40% PTT was À48.3 and À60.9 kJ/mol, respectively, as calculated by the Arrhenius formula for the isothermal-crystallization processes.The Hoffman-Lauritzen theory was also employed to fit the process of isothermal crystallization, and the kinetic parameters of the blends with 20 or 40% PTT were determined to be 1.5 Â 10 5 and 1.8 Â 10 5 K 2 , respectively. The spherulite morphology of the six binary blends formed at 1908C showed different sizes and perfect Maltese crosses when the PTT or PEN component was varied, suggesting that the greater the PTT content was, the larger or more perfect the crystallites were that formed in the binary blends.

show abstract

Nonisothermal crystallization kinetics and spherulite morphology of poly(trimethylene terephthalate)

Cited by 70 publications

References 17 publications

Interior Lamellar Assembly and Optical Birefringence in Poly(trimethylene terephthalate) Spherulites: Mechanisms from Past to Present

Interior Lamellar Assembly and Optical Birefringence in Poly(trimethylene terephthalate) Spherulites: Mechanisms from Past to Present

Nanostructuring Thin Polymer Films with Optical Near Fields

Isothermal‐crystallization kinetics and melting behavior of crystalline/crystalline blends of poly(trimethylene terephthalate) and poly(ethylene 2,6‐naphthalate)

Contact Info

Product

Resources

About