Growth of Spatial Dendrites in Bisphenol-A Polycarbonate Induced by Dioctyl Phthalate at High Pressure

Lü, Jun; Oh, Il‐Kwon; Huang, Rui

doi:10.1080/15421400903054436

Cited by 3 publications

(1 citation statement)

References 16 publications

(17 reference statements)

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“…As N , N ‐dimethylacetamide is a good solvent for amorphous BAPC but the poor solvent for crystalline one, it is chosen to etch the films of BAPC/DAP blends for SEM observation. As shown in Figure a, the BAPC crystals stand out after etching the BAPC/DAP film and look like peanuts.…”

Section: Resultsmentioning

confidence: 99%

Peanut-Like Crystals in Polycarbonate/Plasticizer Blends

Liang

Zhou

et al. 2016

Macromol. Chem. Phys.

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Bisphenol‐A polycarbonate (BAPC) crystal with unusual morphology is obtained in the solution‐cast films of BAPC/plasticizer blends. It seems like Siamese twin spherulites, and owns a peanut‐like morphology with more than one nucleating sites. Furthermore, concentric black dotted rings, which should be the aggregation regions of plasticizers, are also observed within the peanut‐like crystals. The peanut‐like morphology has no selectivity to the kinds of plasticizer and the casting temperature. The development of these peanut‐like crystals is mainly ascribed to the local orientations of BAPC chains, which are induced by the concentration fluctuation during solvent evaporation and further fixed by the quick drying process. The concentric black dotted rings within the peanut‐like crystals shall be attributed to the driving effect of BAPC crystalline lamellae and phase separation between plasticizers and BAPC. This work opens a new window for the regular arrangement of small molecules.

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Section: Resultsmentioning

confidence: 99%

Peanut-Like Crystals in Polycarbonate/Plasticizer Blends

Liang

Zhou

et al. 2016

Macromol. Chem. Phys.

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Effective improvement in poly( bisphenol‐A carbonate) crystallinity by ionization of its polyamide‐66 heterogeneous nucleator: The role of ion‐dipole interactions

Ding

Luo

Wang

et al. 2020

Polymer Crystallization

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Spherulitic Growth of Poly (Ether Ether Ketone) Crystallized at High Pressure

Zhang

Tian

et al. 2011

Journal of Macromolecular Science, Part B

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High-pressure crystallized poly (ether ether ketone) (PEEK) samples were prepared with a piston-cylinder apparatus by varying temperature, pressure, crystallization time, and molecular weight, and were investigated using wide-angle X-ray diffraction (WAXD), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM). The applied etching experiments showed that the chemical resistance of the polymer was significantly improved through the high-pressure treatment. The results also revealed that PEEK spherulites with folded-chain lamellae as substructures and with different characteristics were formed at high pressure. Crystalline elliptical micro-spheres consisting of flake-like lamellae with rugged surfaces were observed on the etched samples with SEM, which may diversify niche applications in functional fillers, carriers, adsorbents, etc. Morphological observations suggested that such micro-spheres might possibly have evolved from a novel dendritic crystal. Furthermore, a granular substructure of the lamellae was observed in these single-phase polymer systems with rigid molecular backbones, which further confirmed the model developed by Strobl for polymer crystallization.

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Growth of Spatial Dendrites in Bisphenol-A Polycarbonate Induced by Dioctyl Phthalate at High Pressure

Cited by 3 publications

References 16 publications

Peanut-Like Crystals in Polycarbonate/Plasticizer Blends

Peanut-Like Crystals in Polycarbonate/Plasticizer Blends

Effective improvement in poly( bisphenol‐A carbonate) crystallinity by ionization of its polyamide‐66 heterogeneous nucleator: The role of ion‐dipole interactions

Spherulitic Growth of Poly (Ether Ether Ketone) Crystallized at High Pressure

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