Crystalline structures in ultrathin poly(ethylene oxide)/poly(methyl methacrylate) blend films

Wang, Mingtai; Braun, Hans‐Georg; Meyer, Evelyn

doi:10.1016/s0032-3861(03)00492-0

Cited by 52 publications

(88 citation statements)

References 39 publications

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“…Thus, it is naturally expected that the miscible polymer blends will show a more complicated morphology during crystallization in the ultrathin films. Reports on the crystallization of polymer blends in ultrathin films are few; just the crystallization behavior and morphology of several blend systems such as PEO/poly(methyl methacrylate) (PMMA) [101,102], PCL/poly(vinyl chloride) (PVC) [103], PLLA/PHB [104], PLLA/PBA [105,106] and PLLA/poly(D-lactic acid) (PDLA) blends [107][108][109] in ultrathin films have been reported in the literature. Among these blend systems, PLLA/PDLA blend is a unique and interesting system because these two isotactic polyenantiomers, PLLA and PDLA, can form stereocomplexes in their blends [110,111].…”

Section: Crystalline Morphology Of Polymers Confined In Miscible Blendsmentioning

confidence: 99%

Crystalline and Spherulitic Morphology of Polymers Crystallized in Confined Systems

Xie

Bao

et al. 2017

Crystals

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Due to the effects of microphase separation and physical dimensions, confinement widely exists in the multi-component polymer systems (e.g., polymer blends, copolymers) and the polymers having nanoscale dimensions, such as thin films and nanofibers. Semicrystalline polymers usually show different crystallization kinetics, crystalline structure and morphology from the bulk when they are confined in the nanoscale environments; this may dramatically influence the physical performances of the resulting materials. Therefore, investigations on the crystalline and spherulitic morphology of semicrystalline polymers in confined systems are essential from both scientific and technological viewpoints; significant progresses have been achieved in this field in recent years. In this article, we will review the recent research progresses on the crystalline and spherulitic morphology of polymers crystallized in the nanoscale confined environments. According to the types of confined systems, crystalline, spherulitic morphology and morphological evolution of semicrystalline polymers in the ultrathin films, miscible polymer blends and block copolymers will be summarized and reviewed.

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Section: Crystalline Morphology Of Polymers Confined In Miscible Blendsmentioning

confidence: 99%

Crystalline and Spherulitic Morphology of Polymers Crystallized in Confined Systems

Xie

Bao

et al. 2017

Crystals

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“…The miscibility of the polymer pairs is always one of the objectives of the study for blends. PEO/PMMA blends are one of the most studied blends on their miscibility, [11,[21][22][23][24] crystallinity, [25] thermal properties [10] etc. The miscibility of PEO/PMMA blends depends on several factors such as temperature, [26] composition of the blend, [21,27] the tacticity of PMMA [28,29] and so on.…”

Section: à4mentioning

confidence: 99%

On Thermal and Spectroscopic Studies of Poly(ethylene oxide)/Poly(methyl methacrylate) Blends with Lithium Perchlorate

Karim

Sim

Chan

et al. 2015

Macromolecular Symposia

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Summary: In this study, thermal properties and ion-polymer interactions of lithium perchlorate (LiClO 4 ) in poly(ethylene oxide)/poly(methyl methacrylate) (PEO/PMMA) blend prepared by solution casting technique were elucidated. The spectroscopic studies of the salt-free and salt-doped PEO/PMMA blends were investigated using x-ray diffraction (XRD) and Fourier transform infra-red (FTIR), respectively. XRD study reveals that the crystalline structure of PEO is slight change when PMMA is blended to PEO. The thermal behaviour of PEO, PMMA and their blends with and without LiClO 4 was investigated by differential scanning calorimetry (DSC). The presence of a single and composition dependent glass transition temperature (T g ) reflects the miscibility of the salt-free PEO/PMMA blends in the molten state. The T g s of PEO, PMMA and the blends generally increase with ascending mass fraction of salt (W S ). However, PEO/PMMA 50/50 blend with W S ! 0.091 shows phase separation between the two polymers. The melting temperature (T m ) and crystallinity (X Ã ) of PEO are suppressed when blended with PMMA, thus, confirm the miscibility of the salt-free PEO/PMMA blends in the molten state. Presence of LiClO 4 to PEO, PMMA and their blends does not influences the X Ã of PEO. Investigation by FTIR does not show any specific interaction between PEO and PMMA for the salt-free blends whereas for the salt-doped blends, Li þ ions are observed to coordinate with the oxygen atom of both the PEO ether and the PMMA carboxyl groups. Impedance spectroscopy study demonstrates that the LiClO 4 -doped PEO/PMMA 75/25 blend has lower ion conductivity than that of the PEO þ LiClO 4 system but recorded enhanced conductivity as compared to PMMA þ LiClO 4 systems at W S ¼ 0.091.

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“…For example, a crystallization-induced vertical stratified structures and lateral phase separation morphology were constructed for the crystalline poly(3-hexylthiophene) (P3HT)/ poly(ethylene glycol)s (PEG) systems by Zhao et al [25]. The crystallization process and crystal morphology is quiet different from the pure PEO film due to the influence of phase separation for the ultrathin PMMA/polyethylene oxide (PEO) blend films [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Surface phase separation, dewetting feature size, and crystal morphology in thin films of polystyrene/poly(ε-caprolactone) blend

et al. 2012

Journal of Colloid and Interface Science

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Crystalline structures in ultrathin poly(ethylene oxide)/poly(methyl methacrylate) blend films

Cited by 52 publications

References 39 publications

Crystalline and Spherulitic Morphology of Polymers Crystallized in Confined Systems

Crystalline and Spherulitic Morphology of Polymers Crystallized in Confined Systems

On Thermal and Spectroscopic Studies of Poly(ethylene oxide)/Poly(methyl methacrylate) Blends with Lithium Perchlorate

Surface phase separation, dewetting feature size, and crystal morphology in thin films of polystyrene/poly(ε-caprolactone) blend

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