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

2015 ◽  
Vol 4 (4) ◽  
pp. 207-214
Author(s):  
Roland Vogel ◽  
Harald Brunig ◽  
Liane Haussler
Keyword(s):  
Orotic Acid ◽  
Nucleating Agent ◽  
Polypropylene Fibers

scholarly journals Supramolecular Structure of Polypropylene Fibers Extruded with Addition of Functionalized Reduced Graphene Oxide

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 910 ◽  
Author(s):  
Jan Broda ◽  
Janusz Fabia ◽  
Marcin Bączek ◽  
Czesław Ślusarczyk
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Supramolecular Structure ◽  
Nucleating Agent ◽  
Polypropylene Fibers ◽  
Fiber Structure ◽  
X Ray Scattering ◽  
Reduced Graphene ◽  
The Impact ◽  
Spun Fibers

An effective β-nucleating agent for polypropylene crystallization was obtained by the functionalization of reduced graphene oxide with calcium pimelate. The nucleating ability of the modified reduced graphene oxide (rGO-CP) was confirmed during non-isothermal crystallization. In further examinations, the rGO-CP was used as an additive to modify polypropylene fibers. The fibers were extruded in laboratory conditions. Gravity spun fibers containing three different concentrations of the rGO-CP and fibers taken at three different velocities were obtained. The supramolecular structure of the fibers was examined by means of calorimetric and X-Ray Scattering methods (DSC, WAXS, and SAXS). The considerable amount of β-iPP was obtained only in the gravity spun fibers. In the fibers extruded at higher velocities, the diminishing impact of the additive on the fibers structure was revealed. The changes observed in the fiber structure in connection with the impact of the additive on polypropylene crystallization was discussed.

Effect of orotic acid as a nucleating agent on the crystallization of bacterial poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) copolymers

2009 ◽  
Vol 114 (2) ◽  
pp. 1287-1294 ◽  
Author(s):  
Nicolas Jacquel ◽  
Koichirou Tajima ◽  
Nobuo Nakamura ◽  
Toshio Miyagawa ◽  
Pengju Pan ◽  
...  
Keyword(s):  
Orotic Acid ◽  
Nucleating Agent

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

2015 ◽  
Vol 133 (5) ◽  
pp. n/a-n/a ◽  
Author(s):  
Jinjun Yang ◽  
Yichun Chen ◽  
Lei Hua ◽  
Rong Liang ◽  
Dianxing Zhu
Keyword(s):  
Orotic Acid ◽  
Crystallization Behavior ◽  
Nucleating Agent

scholarly journals 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 ◽  
2017 ◽  
Vol 7 (44) ◽  
pp. 27150-27161 ◽  
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.

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

2010 ◽  
Vol 115 (2) ◽  
pp. 709-715 ◽  
Author(s):  
Nicolas Jacquel ◽  
Koichirou Tajima ◽  
Nobuo Nakamura ◽  
Hideo Kawachi ◽  
Pengju Pan ◽  
...  
Keyword(s):  
Orotic Acid ◽  
Nucleating Agent ◽  
Nucleation Mechanism

Production of Fatty Liver with Dietary Ethanol Despite Orotic Acid Supplementation

1974 ◽  
Vol 35 (1) ◽  
pp. 20-25 ◽  
Author(s):  
Juan G. Edreira ◽  
Robert L. Hirsch ◽  
James A. Kennedy
Keyword(s):  
Fatty Liver ◽  
Orotic Acid ◽  
Acid Supplementation

CONTRIBUTION TO THE EXISTENCE OF REGULATORY MECHANISMS AT THE ADRENAL LEVEL

1972 ◽  
Vol 70 (4) ◽  
pp. 741-757
Author(s):  
Otto Linèt
Keyword(s):  
Orotic Acid ◽  
Adrenal Glands ◽  
Actinomycin D ◽  
Delay Period ◽  
Regulatory Mechanisms ◽  
Leucine Incorporation ◽  
Total Period ◽  
Free Media

ABSTRACT Rat adrenal glands atrophied by the administration of cortisol acetate in vivo were used as a model for the study of early metabolic processes occurring in vitro. Atrophied adrenals incubated in the presence of 14C-leucine incorporated subnormal quantities of this amino acid per mg of protein for the first 120 min. When the incubation lasted for a total period of 180 or 240 min a supranormal rise in the 14C-leucine incorporation was observed. Similar changes occurred with some delay with regard to corticosterone production as expressed per 100 mg of tissue. No differences in 14C-leucine incorporation were observed between the control and atrophied adrenals in vivo. Homogenates from atrophied glands incorporated 14C-leucine to a greater extent than the control homogenates. The in vitro incorporation of 14C-orotic acid into the RNA was also higher in atrophied adrenals. The in vitro use of actinomycin D, cycloheximide and amphenone indicated that corticosterone production depended on the incorporation of 14C-leucine. The addition of cortisol to the incubation media markedly decreased the enhancement of 14C-lysine incorporation into the protein of atrophied adrenals. These, as well as additional results suggest rebound phenomena: once atrophic adrenals are transferred to cortisol-free media, reparative processes begin after a delay period. Such phenomena seem to be mediated by regulatory mechanisms at the adrenal level.

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