Nucleation mechanism of polyhydroxybutyrate and poly(hydroxybutyrate-co-hydroxyhexanoate) crystallized by orotic acid as a nucleating agent

In the interest of improving the crystallization rate of poly(p-dioxanone) (PPDO), an inclusion complex (IC) based on β-cyclodextrin (β-CD) and polyglycolide (PGA) serving as a green nucleating agent for PPDO was achieved by a solution technique.

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Crystallization behavior and polymorphism of poly(1,4-butylene adipate): Effect of anhydrous orotic acid as nucleating agent

Journal of Applied Polymer Science ◽

10.1002/app.42957 ◽

2015 ◽

Vol 133 (5) ◽

pp. n/a-n/a ◽

Cited By ~ 3

Author(s):

Jinjun Yang ◽

Yichun Chen ◽

Lei Hua ◽

Rong Liang ◽

Dianxing Zhu

Keyword(s):

Orotic Acid ◽

Crystallization Behavior ◽

Nucleating Agent

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Role of epitaxy of nucleating agent (NA) in nucleation mechanism of polymers

Polymer ◽

10.1016/j.polymer.2006.10.048 ◽

2007 ◽

Vol 48 (1) ◽

pp. 401-408 ◽

Cited By ~ 53

Author(s):

Kiyoka Okada ◽

Kaori Watanabe ◽

Tsuyoshi Urushihara ◽

Akihiko Toda ◽

Masamichi Hikosaka

Keyword(s):

Nucleating Agent ◽

Nucleation Mechanism

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Properties of polypropylene fibers using the green chemical orotic acid as nucleating agent

Advances in materials Research ◽

10.12989/amr.2015.4.4.207 ◽

2015 ◽

Vol 4 (4) ◽

pp. 207-214

Author(s):

Roland Vogel ◽

Harald Brunig ◽

Liane Haussler

Keyword(s):

Orotic Acid ◽

Nucleating Agent ◽

Polypropylene Fibers

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Insight into the role of bound water of a nucleating agent in polymer nucleation: a comparative study of anhydrous and monohydrated orotic acid on crystallization of poly(l-lactic acid)

RSC Advances ◽

10.1039/c7ra02617j ◽

2017 ◽

Vol 7 (44) ◽

pp. 27150-27161 ◽

Cited By ~ 8

Author(s):

Ping Song ◽

Lin Sang ◽

Liuchun Zheng ◽

Chao Wang ◽

Kankan Liu ◽

...

Keyword(s):

Lactic Acid ◽

Comparative Study ◽

Orotic Acid ◽

Bound Water ◽

Nucleating Agent ◽

Negative Role ◽

Insight Into

The bound water of orotic acid and its dehydration transition play a negative role in nucleation effects on PLLA crystallization.

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Effect of Orotic Acid on the Crystallization Kinetics and Morphology of Biodegradable Poly(l-lactide) as an Efficient Nucleating Agent

Industrial & Engineering Chemistry Research ◽

10.1021/ie2019596 ◽

2011 ◽

Vol 50 (21) ◽

pp. 12299-12303 ◽

Cited By ~ 70

Author(s):

Zhaobin Qiu ◽

Zhisheng Li

Keyword(s):

Crystallization Kinetics ◽

Orotic Acid ◽

Nucleating Agent ◽

Biodegradable Poly

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Transmission Electron Microscopy characterization of epitaxial III-V semiconductor thin films grown on Si(100) by ion-assisted deposition

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100176563 ◽

1990 ◽

Vol 48 (4) ◽

pp. 686-687

Author(s):

L. Hultman ◽

C.-H. Choi ◽

R. Kaspi ◽

R. Ai ◽

S.A. Barnett

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Ion Irradiation ◽

High Energy ◽

Nucleation Mechanism ◽

Layer By Layer ◽

Extended Defect ◽

Island Formation ◽

Si Substrates ◽

Transmission Electron

III-V semiconductor films nucleate by the Stranski-Krastanov (SK) mechanism on Si substrates. Many of the extended defects present in the films are believed to result from the island formation and coalescence stage of SK growth. We have recently shown that low (-30 eV) energy, high flux (4 ions per deposited atom), Ar ion irradiation during nucleation of III-V semiconductors on Si substrates prolongs the 1ayer-by-layer stage of SK nucleation, leading to a decrease in extended defect densities. Furthermore, the epitaxial temperature was reduced by >100°C due to ion irradiation. The effect of ion bombardment on the nucleation mechanism was explained as being due to ion-induced dissociation of three-dimensional islands and ion-enhanced surface diffusion.For the case of InAs grown at 380°C on Si(100) (11% lattice mismatch), where island formation is expected after ≤ 1 monolayer (ML) during molecular beam epitaxy (MBE), in-situ reflection high-energy electron diffraction (RHEED) showed that 28 eV Ar ion irradiation prolonged the layer-by-layer stage of SK nucleation up to 10 ML. Otherion energies maintained layer-by-layer growth to lesser thicknesses. The ion-induced change in nucleation mechanism resulted in smoother surfaces and improved the crystalline perfection of thicker films as shown by transmission electron microscopy and X-ray rocking curve studies.

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