Comparison of crystallization kinetics in various nanoconfined geometries

Sun, Lu; Zhu, Lei; Ge, Qing; Quirk, Roderic P.; Cheng, Xue; Cheng, Stephen Z. D.; Hsiao, Benjamin S.; Ávila‐Orta, Carlos A.; Šics, Igors; Cantino, Marie E.

doi:10.1016/j.polymer.2004.02.068

Cited by 77 publications

(62 citation statements)

References 33 publications

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“…In recent years, crystallization of polymers under cylindrical confinement of organic [1][2][3][4][5] or inorganic [6][7][8][9][10][11][12][13] templates has been widely investigated. Strong phaseseparated crystalline-amorphous diblock copolymers have been employed to construct hexagonal nanocylindrical structures to investigate the crystallization of the crystallizable blocks confined in the continuous amorphous matrix.…”

Section: Introductionmentioning

confidence: 99%

Orientation of Syndiotactic Polystyrene Crystallized in Cylindrical Nanopores

Wang

Huang

et al. 2009

Macromol. Rapid Commun.

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Syndiotactic polystyrene (sPS) nanorods with different diameters have been prepared by using anodic aluminum oxide templates, and the orientation of the sPS crystals in the nanorods has been investigated by FT-IR spectroscopy. It is found that the c axis of the β' crystals preferentially oriented perpendicular to the axis of the nanorod, and the degree of orientation is lower as the diameter of the nanorod decreases. This unexpected result is attributed to nuclei formed at the surface of the nanopores and their subsequent growth, in addition to the preferential growth compatible with the pore direction by the nuclei formed in the bulk film and in the nanorods.

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Section: Introductionmentioning

confidence: 99%

Orientation of Syndiotactic Polystyrene Crystallized in Cylindrical Nanopores

Wang

Huang

et al. 2009

Macromol. Rapid Commun.

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“…It is clear that the final morphology is a consequence of microphase separation, crystallization, and vitrification. For systems with T ODT > T g a > T c c (i.e., a hard confinement for crystallization), [6][7][8][9][10][11][12][13][14][15][16] the ordered nanostructure is preserved because of the vitrified microdomains of amorphous blocks. In contrast to the hard confinement, morphological evolution upon crystallization is more complicated if T ODT > T c c !…”

Section: Introductionmentioning

confidence: 99%

Crystallization of Polystyrene‐block‐[Syndiotactic Poly(propylene)] Block Copolymers from Confinement to Breakout

Ho¹,

Chung²,

Tsai³

et al. 2005

Macromol. Rapid Commun.

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Summary: Various crystalline textures have been identified in a crystallizable block copolymer system, polystyrene‐block‐[syndiotactic poly(propylene)] (PS‐sPP), having a glass‐transition temperature of PS (Tg,PS) located in the midst of the sPP crystallization window. A confined morphology for the crystallization of sPP was observed while the crystallization temperature of sPP (Tc,sPP) was less than Tg,PS. A further increase in Tc,sPP could lead to a breakout in nanostructure. This study revealed the Tg effect on crystallization‐induced morphological changes of block copolymers from confinement to breakout.TEM images and one‐dimensional SAXS profiles of PS‐sPP isothermally crystallized at TODT > Tg,PS > Tc,sPP (top) and TODT > Tc,sPP > Tg,PS (bottom).imageTEM images and one‐dimensional SAXS profiles of PS‐sPP isothermally crystallized at TODT > Tg,PS > Tc,sPP (top) and TODT > Tc,sPP > Tg,PS (bottom).

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“…However, it can be found from the DSC thermograms of hybrids containing 20.73 and 31.25 wt% PEGDS that their T c s decline to 7.29°C and 11.08°C, respectively. As there is little room between the interlayers of the silica matrix, where the PEGDS can crystallize, and all the crystals of the PEG block are primary crystals with perfect form, the crystallization of the PEGDS should be homogeneously nucleated at a larger degree of supercooling, resulting in a significant decrease of the T c s [16][17][18]. These results further suggest that the crystallization of the PEGDS within the silica matrix be significantly inhibited by the confinement of 1D lamellar mesostructure of the inorganic component.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, there has been a great deal of interest in the crystallization behaviors of polymer hybridized within inorganic matrix, where the polymers are confined under geometries as vehicles, for understanding and controlling the properties of crystalline polymers in the hybrids, because crystalline polymers constitute a significant percentage of all useful polymeric materials [16][17][18][19][20]. Compared with the amorphous counterpart, crystallinity leads to supervisor physical and chemical properties as well as phasechangeable function benefiting the phase-change materials (PCMs) for the usage of energy storage and temperature controlling [21][22][23].…”

Section: Introductionmentioning

confidence: 99%