Effects of crystallization behavior on morphological change in poly(trimethylene terephthalate) spherulites

Chuang, Wei‐Tsung; Hong, Po‐Da; Chuah, Hoe H.

doi:10.1016/j.polymer.2004.01.048

Cited by 77 publications

(79 citation statements)

References 75 publications

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“…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.…”

Section: Figure 1 Crystallization Kinetics and The Related Morphologmentioning

confidence: 76%

“…Crystallization kinetics and the related morphologies of poly(trimethylene terephthalate) (PTT) films crystallized at various conditions: ( ) Avrami rate constants from melt-crystallization; ( ) Avrami rate constants from cold-crystallization; ( ) optical microscopy spherulitic growth rate. Adapted with permission from [13].…”

Section: The Effect Of Sample Thicknessmentioning

confidence: 99%

“…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 Thicknessmentioning

confidence: 99%

“…With all these characteristic features, PTT is a good candidate for the study of polymer crystallization and self-assembly. Thus, in this paper, the works on PTT crystallization, including its kinetics [10,11], intrinsic birefringence [12][13][14], as well as its spherulitic morphologies, particularly its banded spherulite structures and formations [2][3][4][5][6][7][8][9] are reviewed in order to provide insight into the real lamellar structures in banded spherulites crystallized from melting.…”

Section: Introductionmentioning

confidence: 99%

“…Due to their complex yet systematic arrangements, banded spherulites have decreases, the morphology changes from an axialite or an elliptically shaped spherulite in regime I to a banded spherulite in regime II, then to a non-banded spherulite in regime III. Figure 1 shows the crystallization kinetic phase diagram of PTT adapted from [13].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

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

2017

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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.

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Section: Figure 1 Crystallization Kinetics and The Related Morphologmentioning

confidence: 76%

Section: The Effect Of Sample Thicknessmentioning

confidence: 99%

Section: The Effect Of Sample Thicknessmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

2017

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Banded spherulites in poly(L‐lactic acid): Effects of the crystallization temperature and molecular weight

Wang

Mano

2007

J of Applied Polymer Sci

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The spherulitic morphology of pure poly(Llactide) (PLLA) was investigated with polarized optical microscopy as a function of the crystallization temperature and molecular weight. After being melted at 2108C for 3 min, samples were cooled quickly to designated temperatures for isothermal crystallization. It was shown for the first time that a clear banding-to-nonbanding morphological transition took place at a critical temperature for PLLA with a number-average molecular weight of 86,000. With the increasing molecular weight of the material, the spherulite growth rates decreased notably, and the band spacing decreased significantly. On the basis of the main-chain chirality in PLLA and the observation of a nonbanded spherulitic morphology in a certain temperature region, it was suggested that the crystallization temperature might have an effect on the relationship between the sense of lamellar twisting and the main-chain chiral structure in PLLA.

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Melting and crystallization behaviors of compatibilized poly(trimethylene terephthalate)/acrylonitrile–butadiene–styrene blends

Xue

Chuah

et al. 2008

J of Applied Polymer Sci

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ABSTRACT:The melting and crystallization behaviors of poly(trimethylene terephthalate) (PTT)/acrylonitrile-butadiene-styrene (ABS) blends were investigated with and without epoxy or styrene-butadiene-maleic anhydride copolymer (SBM) as a reactive compatibilizer. The existence of two separate composition-dependent glass-transition temperatures (T g 's) indicated that PTT was partially miscible with ABS over the entire composition range. The melting temperature of the PTT phase in the blends was also composition dependent and shifted to lower temperatures with increasing ABS content. Both the cold crystallization temperature and T g of the PTT phase moved to higher temperatures in the presence of compatibilizers, which indicated their compatibilization effects on the blends. A crystallization exotherm of the PTT phase was noticed for all of the PTT/ABS blends. The crystallization behaviors were completely different at low and high ABS contents. When ABS was 0-50 wt %, the crystallization process of PTT shifted slightly to higher temperatures as the ABS content was increased. When ABS was 60 wt % or greater, PTT showed fractionated crystallization. The effects of both the epoxy and SBM compatibilizers on the crystallization of PTT were content dependent. At a lower contents of 1-3 wt % epoxy or 1 wt % SBM, the crystallization was retarded, whereas at a higher content of 5 wt %, the crystallization was accelerated. The crystallization kinetics were analyzed with a modified Avrami equation.

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Effects of crystallization behavior on morphological change in poly(trimethylene terephthalate) spherulites

Cited by 77 publications

References 75 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

Banded spherulites in poly(L‐lactic acid): Effects of the crystallization temperature and molecular weight

Melting and crystallization behaviors of compatibilized poly(trimethylene terephthalate)/acrylonitrile–butadiene–styrene blends

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