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您现在的位置:欢乐时时彩 > 资料 > poly(monothiocarbonate) 的搜索结果 共有结果2759,当前从第1条到第10条,本次搜索耗时0.0155821
 
Poly(trimethylene monothiocarbonate) from the Alternating Copolymerization of COS and Oxetane: A Semicrystalline Copolymer
ABSTRACT: A semicrystalline poly(trimethylene monothiocarbonate) (PTMMTC) has been synthesized via the selective and alternating copolymerization of carbonyl sulfide and oxetane. This reaction was catalyzed by (salen)CrCl accompanied by organic bases over a wide range of temperatures from 40 to 130 °C. PTMMTC is shown to exhibit similar crystallization behavior to high-de...
http://www.stageastar.comt//ss/xhzhang/publicationsshow_10152.html
 
Poly(monothiocarbonate)s from the Alternating and Regioselective Copolymerization of Carbonyl Sulfide with Epoxides
CONSPECTUS: Carbonyl sulfide (COS) is an air pollutant that causes acid rain, ozonosphere damage, and carbon dioxide (CO2) generation. It is a heterocumulene and structural analogue of CO2. Relevant to organic synthesis, it is a source of C=O or C=S groups and thus an ideal one-carbon (C1) building block for synthesizing sulfur-containing polymers through the simila...
http://www.stageastar.comt//ss/xhzhang/publicationsshow_9761.html
 
Well-defined high refractive index poly(monothiocarbonate) with tunable Abbe''s numbers and glass-transition temperatures via terpolymerization
The synthesis of thermoplastics with high refractive index (n) and high Abbe’s number (Vd) is rarely reported. This work describes well-controlled synthesis of a soluble poly(monothiocarbonate) with high n and Vd values by using carbonyl sulfide (COS) as sulfur resource. The alternating COS/cyclohexene oxide (CHO)/propylene oxide (PO) terpolymerization was well performed by using...
http://www.stageastar.comt//ss/xhzhang/publicationsshow_8493.html
 
Highly Efficient One-Pot Synthesis of COS-Based Block Copolymers by Using Organic Lewis Pairs
关键字:metal-free Lewis pairs,poly(monothiocarbonate) block copolymer,carbonyl sulfide,immortal polymerization
A one-pot synthesis of block copolymer with regioregular poly(monothiocarbonate) block is described via metal-free catalysis. Lewis bases such as guanidine, quaternary onium salts, and Lewis acid triethyl borane (TEB) were equivalently combined and used as the catalysts. By using polyethylene glycol (PEG) as the macromolecular chain transfer agent (CTA), narrow polydispersity block copolym...
http://www.stageastar.com/research/sy_info19590
 
Highly Efficient One-Pot Synthesis of COS-Based Block Copolymers by Using Organic Lewis Pairs
关键字:metal-free Lewis pairs,poly(monothiocarbonate) block copolymer,carbonyl sulfide,immortal polymerization
A one-pot synthesis of block copolymer with regioregular poly(monothiocarbonate) block is described via metal-free catalysis. Lewis bases such as guanidine, quaternary onium salts, and Lewis acid triethyl borane (TEB) were equivalently combined and used as the catalysts. By using polyethylene glycol (PEG) as the macromolecular chain transfer agent (CTA), narrow polydispersity block copolym...
http://www.stageastar.com/research/sy_info19590
 
Synthesis of Poly(L-lactide)-b-poly((Z)-L-lysine) Block Copolymer
关键字:Synthesis,Poly,lactide,poly,lysine,Block,Copolymer,
Among the biodegradable polymers, poly(lactic acid) is a versatile, well-characterized material and one of the few degradable materials currently used clinically.
http://www.stageastar.com/research/dis_info1935
 
Synthesis of Poly(L-lactide)-b-poly((Z)-L-lysine) Block Copolymer
关键字:Synthesis,Poly,lactide,poly,lysine,Block,Copolymer,
Among the biodegradable polymers, poly(lactic acid) is a versatile, well-characterized material and one of the few degradable materials currently used clinically.
http://www.stageastar.com/research/dis_info1935
 
Investigation on poly(3-hydroxybutyrate) and poly(ethylene glycol) multiblock copolymers
关键字:Investigation,poly,hydroxybutyrate,poly,ethylene,glycol,multiblock,copolymers,
  Q. Zhao, L. Zhang, and G. Cheng*   School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China   In recent years, Poly(3-hydroxybutyrate) (PHB) has been intensively studied due to its special properties, such as biocompatibility, biodegradability, piezoelectric properties and so on [1-2]. Meanwhile, PHB is a polymer with high degree of crystallinit...
http://www.stageastar.com/Industry/industry228.html
 
Poly-(p-phenylene vinylenes) with Pendent
To improve efficiency, processability, and stability, three novel poly-(pphenylene vinylenes) (PPVs) derivatives (Pa, Pb, and Pc) with pendent 2,4-difluorophenyl and fluorenyl moieties were synthesized via Gilch reaction. Their structures were characterized by 1H NMR, 13C NMR, and ELEM. ANAL. Compared with those of PPV and MEH-PPV, the absolute quantum efficiencies of these polymers showed rema...
http://www.stageastar.comt//ss/lishengbiao/publicationsshow_2683.html
 
MORPHOLOGY, CRYSTALLIZATION KINETICS AND HYDROLYTIC DEGRADATION OF POLY(P-DIOXANONE) AND POLY(P-DIOXANONE)-B-POLY(ε-CAPROLACTONE) DIBLOCK COPOLYMERS
关键字:MORPHOLOGY,CRYSTALLIZATION,KINETICS,AND,HYDROLYTIC,DEGRADATION,POLY,DIOXANONE,AND,POLY,DIOXANONE,POLY,CAPROLACTONE,DIBLOCK,COPOLYMERS,
Alejandro J.Mtlller, Julio Albuerne, Marcos Sabino and Leui MarquezGrupo de Polimeros USB, Departamento de Ciencia de los Materiales, Universidad Sim6n Bolivar, Caracas 1080-A, Venezuela. E-mail: amuller@usb.ve.        Poly(p-dioxanone) or PPDX is a synthetic poly(ester-ether) that exhibits appropriate molecular structure and properties for biomedical applications su...
http://www.stageastar.com/Industry/industry352.html
 
 
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