Studies on the preparation and properties of bisphenol-a polycarbonate and some new copolymers. by Georgius Abdal Adam Download PDF EPUB FB2
This work deals with the modification of bisphenol-A polycarbonate (PC) into polycarbonate-poly(ε-caprolactone), PC-PCL, copolymer through in situ polymerization of ε-caprolactone by reactive extrusion.
In details, it consists in synthesizing first active titanium-polycarbonate [Ti(OPC) 4] sites after an exchange reaction between PC and titanium n-propoxide, and then in polymerizing ε Cited by: 3. Preparation and properties of some graft copolymers of the poly(2-chlorocyanurate) ester of bisphenol A A.
De Boos* and G. Allen Department of Chemistry, University of Manchester. Manchester MI3 9PL, UK (Received 22 March ) Graft copolymers of poly(2-chlorocyanurate)ester of bisphenol A have been prepared by coupling with polymers Cited by: 2.
This paper focuses on the use of segmented bis-(4-hydroxyphenyl) cyclohexane (bis-Z) polycarbonate–polydimethylsiloxane copolymers as an additive to improve surface and wear properties of. Request PDF | Preparation of Block Copolymers with a SingleTg Based on Segments of Poly(oxy-2,6-dimethyl-1,4-phenylene) and Polycarbonate of Bisphenol A | The synthesis and the properties of block.
The relative permittivity and dielectric strength have been determined for a bisphenol A polycarbonate (BPA-PC), in which a cyanoethyl group has been substituted for one of the geminal dimethyl groups. The new material (CN-PC) has a glass transition temperature that is 19 K higher than that for BPA-PC.
In addition, the dielectric strength of CN-PC, V/μm, is somewhat smaller than that for Cited by: Bisphenol A (BPA) What is BPA. Bisphenol A, more commonly known as BPA, is a chemical widely used to make polycarbonate plastics and epoxy resins.
Where is BPA found. Polycarbonate plastics have many applications including use in some food and drink packaging such as water and baby bottles, compact discs, impact-resistant safety equipment, andFile Size: KB.
The structure of the four‐component copolyester resulting from the exchange reaction between molten bisphenol‐A polycarbonate and poly(butylene terephthalate) is. Physical blends of bisphenoI-A polycarbonate (PC) and a polyarylate (PAr) exhibit by thermal analysis two amorphous phases: a pure PC phase and a PAr-rich miscible mixed phase.
On controlled thermal treatment, transreaction between PC and PAr takes place mainly in the mixed phase, producing a new Cited by: 7. Dielectric spectroscopy has been applied to the study of commercial bisphenol-A polycarbonate and some of its blends and to their susceptibility to environmental factors.
The multiplicity of overlapping absorptions is consistent with the high impact strength of polycarbonate over. Physical studies of thermoplastics:: I. Melting temperature of modifications in bisphenol A polycarbonate.
A melting point depression study Jonza, James M., "Physical studies of thermoplastics:: I. Melting temperature of modifications in bisphenol A polycarbonate. Solvent Effects on the Surface Composition of Bisphenol A Polycarbonate and Polydimethyl Siloxane (BPAC-DMS) Random Block Copolymers [H.
Zhuang] on *FREE* shipping on qualifying offers. Solvent Effects on the Surface Composition of Bisphenol A Polycarbonate and Polydimethyl Siloxane (BPAC-DMS) Random Block CopolymersAuthor: H. Zhuang. University of Massachusetts Amherst [email protected] Amherst Doctoral Dissertations - February Phase behavior and transreaction studies of model.
Read "The transesterification of bisphenol‐a polycarbonate (PC) and polybutylene terephthalate (PBTP): A new route to block copolycondensates, Polymer Engineering & Science" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at.
Blend Preparation. Both PTT and PC were dried at oC for 12 h and PTT powder and PC pellets were charged to the vessel used as a reactor for synthesis of PTT.
The blending temperature was oC and speed of agitation was 40 rev/min. Blending times were varied up to 90 min for some blends, however, all the blends were mixed at least for 30 min. Answering the needs of manufacturers and product developers, Thermoplastic Materials: Properties, Manufacturing Methods, and Applications provides all the information required to confidently select the right thermoplastic for any application.
Based on a course taught to engineering students, the book starts with an overview of the plastics. Polymer Communication Direct synthesis of aromatic polycarbonate from polymerization of bisphenol A with CO using a Pd–Cu catalyst system Meenakshi Goyala,b, Ritsuko Nagahataa,b, Jun-ichi Sugiyamaa,b, Michihiko Asaia,b, Mitsuru Uedaa,b,c, Kazuhiko Takeuchia,b,* aJoint Research Centre for Precision Polymerization–Tsukuba, Higashi, Tsukuba, IbarakiJapanFile Size: KB.
The kinetic aspects of the bisphenol‐A polycarbonate‐polyethylene terephthalate exchange reaction are studied.
Though the overall mechanism of transesterification is reversible, the kinetics can be treated from a more simple model of two consecutive reactions. In fact, debates and studies on this topic have therefore been intensive and the view of the thermodynamic origin of the UCST in PC/PMMA blends was later revised.
Legras and coworkers  and Rabenoy et al.  suggested that the UCST might be just an artifact that was a result of chemical reaction between PC and PMMA occurring at high. Commercial production of bisphenol A began in the ’s when large-scale uses for polycarbonate plastic and epoxy resins were developed.
The global consumption of bisphenol A in was estimated to be approximately 3 million metric tons (Source: Chemical File Size: 7KB. Reactive blending with cyclic anhydrides in the melt is a promising process to modify the chemical structure of bisphenol A polycarbonate (PC) by insertion of ester moieties leading to consistent changes in the chemical and physical properties of PC.
In particular, by the reaction with succinic anhydride it is possible to insert aliphatic moieties in the polymer backbone, decreasing the melt Cited by: 6. The monomer composing the bulky structure of the copolymers exhibited three characteristics: (1) a strong ring structure or nanoparticle to enhance the glass transition temperature (T g) of the PMMA copolymers [22,23,24,25,26]; (2) reduced moisture absorption because of the hydrophobic properties of the PMMA copolymer [27,28]; and (3) avoidance Cited by: Miscibility of blends of bisphenol-A-polycarbonate and poly(styrene-co- acrylonitrile-co-hydroxystyrene) terpolymerCited by: 5.
Global Hydrogenated bisphenol A Market: Overview. Hydrogenated bisphenol A (HBPA) is a saturated dialchol with a cycloaliphatic structure produced by dehydrogenating bisphenol.
With a configuration similar to bisphenol A, it is available as a white, flaked material soluble /5(33). BISPHENOL A. What is BISPHENOL A. Bisphenol-A (BPA) is a common chemical used to produce polycarbonate plastic.
Polycarbonate is a hard, clear plastic used in a wide variety of consumer products. Polycarbonates will typically be labeled with the recycle symbol “7” or a “PC” near the recycle symbol. polycarbonate in situ polymerization transreaction: Language eng DOI /(SICI)() AID-APP11>CO;2-Y Field of Research 03 Chemical Sciences 09 Engineering HERDC Research category C Refereed article in a scholarly journalCited by: What is claimed is: 1.
A method for preparing a polysiloxane-polycarbonate copolymer comprising: (a) contacting a dihydroxyaromatic compound with a continuous supply of phosgene under interfacial reactions conditions, in aqueous-organic solvent at a pH ofin the presence of at least one tertiary amine, to form a mixture; (b) combining a monohydroxyaromatic compound with the mixture to Author: Nathalie Gonzalez Vidal, James Franklin Hoover, Fabrizio Micciche, Robert Van De Grampel.
The terms homopolymer, copolymer and terpolymer may sound like Latin or Greek. They mean respectively 1,2, or 3 polymers. This is sort of a misnomer as they are more like MONOmer building blocks conjoined through a reaction.
Let's start with "polymer".Poly. Polyphenylene ether (PPE) telechelic macromonomers are unique hydrophobic polyols which have been used to prepare amphiphilic block copolymers. Various polymer compositions have been synthesized with hydrophilic blocks. Their macromolecular nature affords a range of structures including random, alternating, and di- and triblock copolymers.
New macromolecular architectures can offer tailored Cited by: 1. Journal of Polymer Science. Part A, Polymer Chemistry ISSN: X EISSN: Bisphenol A is an organic, colorless solid that is soluble in organic solvent.
It is usually employed in the manufacture of polycarbonate and epoxy resins. The demand for Bisphenol A is mainly triggered by growing demand from electrical and electronic and automotive industries. Copolymers consisting of bisphenol-A ("BPA"), terephthalate ("TP"), and carbonate moieties in mol ratio from towhich are melt processable in the sense of (a) showing no more than 10% change in viscosity number upon compression molding for 10 minutes at ° C.
to form a plaque, (b) developing, in 2% (gm./ml.) DCM solution, a "yellowness index" of no more than 10 as Cited by: AbstractDepolymerization and monomer recovery from polycarbonate (PC) by methanolysis was investigated.
Methanolysis with molar ratios of methanol to polycarbonate ranging from to 50 was carried out from °C to °C for up to 30 min. Polycarbonate decomposed into two monomers, bisphenol A (BPA) and dimethyl carbonate (DMC), and two useful by-products, phenol Cited by: 3.The book covers the basic concept, preparation, characterization, properties, processing and applications of vegetable-oil based conventional polymers, highly branched hyperbranched polymers, polymer composites and nanocomposites.