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Wednesday, July 15, 2020 | History

2 edition of Oligomers of methyl methacrylate and DEC-I-ENE found in the catalog.

Oligomers of methyl methacrylate and DEC-I-ENE

Adrian John Shortland

Oligomers of methyl methacrylate and DEC-I-ENE

some mechanistic studies

by Adrian John Shortland

  • 394 Want to read
  • 33 Currently reading

Published by University of Bimringham in Birmingham .
Written in English


Edition Notes

Thesis (Ph.D)-University of Birmingham, Dept of Chemistry.

Statementby Adrian John Shortland.
ID Numbers
Open LibraryOL13890953M

  In an article published on June 2, , law firm Keller and Heckman LLP (KH) informed that the US Food and Drug Administration (FDA) has added 18 additional entries to its Inventory of Effective Food Contact Substances (FCS) Notifications since January Food contact substances within the inventory are those that “have been demonstrated to be safe for their intended use.”. Telechelic oligomers with dialdehyde end groups and 2,3-dihydroxypropanmethacrylate acetonide repeat units were prepared by the ozonolytic cleavage of poly(2,3-dihydroxypropanmethacrylate.

@article{osti_, title = {Poly(cyclohexylethylene)-block-Poly(lactide) Oligomers for Ultrasmall Nanopatterning Using Atomic Layer Deposition}, author = {Yao, Li and Oquendo, Luis E. and Schulze, Morgan W. and Lewis III, Ronald M. and Gladfelter, Wayne L. and Hillmyer, Marc A.}, abstractNote = {Poly(cyclohexylethylene)-block-poly(lactide) (PCHE–PLA) block polymers were synthesized.   Copolymerization of methyl methacrylate with butyl acrylate leads to an increase of thermal stability in comparison with the thermal stability of homopolymer PMMA: the initial decomposition temperature of copolymer MMA-BA (system M0) is [degrees] C while the initial decomposition temperature of PMMA is [degrees] C (Table 2).

Answer. All artificial nails and adhesives, including UV gels, liquid-and-powder, fabric wraps, and dips are based on some type of acrylate, which includes urethane acrylate oligomers. To achieve the seamless characteristics of displays, liquid crystal (LC) devices need a super-narrow bezel design. This device architecture can be constructed using functional adhesives that possess excellent physical and chemical properties. In this study, mechanically robust ultraviolet (UV)/heat dual-curable adhesives with outstanding reliability and processability have been fabricated.


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Oligomers of methyl methacrylate and DEC-I-ENE by Adrian John Shortland Download PDF EPUB FB2

Fluorine-containing methacrylate monomer tridecafluoro-octyl ester and macro-initiator MPEG-Brwere were synthesized into amphiphilic block polymer with different mole ratio, which was precipitated and then dried.

The column was coated with KBr pellet. After the polymer is spotted and filmed, the infrared spectrogram is conducted. At a scanning range of ~ cm −1, wave number precision.

Poly(methyl methacrylate) (PMMA) is a hydrophobic, linear chain polymer that is glassy at room temperature and may be more easily recognized by such trade names as Lucite or Plexiglas. It has very good light transmittance, toughness, and stability, making it a good material for intraocular lenses and hard contact lenses.

Aldol condensation of methyl propionate (MP) and formaldehyde (FA) is a green and sustainable route to synthesize methyl methacrylate (MMA). In this work, lanthanum and cesium-loaded SBA acid. Copolymerizations of styrene and methyl methacrylate have been performed using different monomer feed compositions in the presence of a catalytic chain transfer agent at 40 C.

Average chain transfer constants as a function of monomer feed composition were determined with the conventional Mayo procedure using both number (Mn) and weight (Mw) average molecular weights, and with the chain Cited by: Irradiation of methyl methacrylate (MMA) in the presence of acyl- and alkyl-cobalt ‘salophen’ reagents leads to good yields of oligomers [(11)–(13)] by way of a novel catalytic ‘hydrocobaltation–dehydrocobaltation’ sequence; hydrocobaltation of the dimer (11)[to (14)] followed by conversion of the latter into (15) in the presence of styrene demonstrates the possibilities for.

In a previous work, we investigated the free-radical copolymerization of methyl methacrylate (MMA) with styrene (St) in the presence of various concentrations of 2-mercaptoethanol (ME) as the chain transfer agent, aiming at the preparation of oligomers with one hydroxy end-group and random copolymer-type backbone as precursors for macromonomers.

Chain transfer constants have been determined for an unsaturated methyl methacrylate trimer, CH 2 C(CO 2 Me)CH 2 [C(CO 2 CH 3)(CH 3)CH 2] 2 H (MMA 3), in polymerizations of methacrylate esters (ethyl, EMA; n-butyl, BMA; tert-butyl, tBMA; 2-ethylhexyl, EHMA) and for the analogous trimers of butyl methacrylate (BMA 3) and methacrylic acid (MAA 3), a hydroxyethyl methacrylate dimer (HEMA 2).

Oligomers of methyl methacrylate (MMA) and of butyl methacrylate (BMA) were synthesized by using a catalytic cobalt chain transfer agent to produce macromonomers with a terminal double bond.

Where necessary, these were fractionated by preparative GPC to obtain samples ranging from dimeric to decameric; typical polydispersities were   Therefore, the compatibilization is necessary for the PVDF/LDPE blend.

Ethylene-glycidyl methacrylate copolymer (EGMA) used in this work is the copolymer of ethylene and glycidyl methacrylate. The weight fractions of ethylene and glycidyl methacrylate are 92% and 8%, respectively.

The vinyl-terminated oligomers were in turn utilised as chain transfer agents, with no further purification, for the formation of diblock copolymers with butyl and methyl methacrylate which constitutes the emulsifier via sulfur-free reversible addition–fragmentation chain transfer polymerisation (SF-RAFT).

Christopher S. Brazel's 64 research works with 4, citations and 4, reads, including: Evaluating the toxicity of bDtBPP on CHO-K1 cells for testing of single-use bioprocessing systems.

Controlled Formation and Binding Selectivity of Discrete Oligo(methyl methacrylate) Stereocomplexes. Journal of the American Chemical Society(5), DOI: /jacs.7b Sivaprakash ShanmugamKrzysztof Matyjaszewski. According to material safety data sheets, she used gels containing monofunctional and multifunctional acrylate/methacrylate monomers/oligomers, powders containing ethyl methacrylate/methyl methacrylate copolymers and primers based on methacrylic acid, but the specific identity of the ingredients was not revealed by the manufacturer for reasons.

The main propagation step is unzipping to monomer which releases large amounts of methyl methacrylate (> 90%). At even higher temperatures and conversion rates decoposition proceeds by a complex series of reactions which lead to the formation of other decomposition products such as butene, methacrylic acid anhydrides.

The chain transfer activities of a series of ω-unsaturated methyl methacrylate oligomers [(dimer (1), trimer (2), tetramer (3), and a methyl methacrylate macromonomer with average chain length of 24 units (4)] have been evaluated in methyl methacrylate polymerizations over the temperature range 45− °er constants were determined by analysis of the ln chain length distributions.

Polymers are mainly characterized by molar mass, chemical composition, functionality and architecture. The determination of the complex structure of polymers by chromatographic and spectroscopic methods is one of the major concerns of polymer analysis and characterization.

This lab manual describes the experimental approach to the chromatographic analysis of polymers. Conclusively, the CEF Panel considers (butadiene, styrene, methyl methacrylate, butyl acrylate) copolymer cross-linked with divinylbenzene or 1,3-butanediol dimethacrylate safe for consumers if used at up to 40% w/w in blends of SAN/PMMA to make repeat-use articles for food contact intended to be used as described above.

For example, the k p of methyl methacrylate has been measured as L mol −1 s −1, whereas the k p of methyl acrylate is nearly fifty times higher at 15 L mol −1 s −1. 31,32 Based upon this, the copolymerisation behaviour of acrylate monomers and these CCTP methacrylic macromonomers is expected to be significantly different, with a.

Dawkins's research works with 1, citations and 1, reads, including: Polymer,Vol. 22, Page For reproduction of material from all other RSC journals and books: (methyl methacrylate) (PMMA) under thermolysis and dynamic vacuum is inherently limited by the repeat-unit structure, leaving much (∼47%) of PMMA to fragment and carbonize to char.

and are also devoid of char formation, leaving the residue as only the oligomers with a. ethylene glycol dimethacrylate (EGDMA) or methyl methacrylate (MMA), DBT catalyst (% of the polyol weight), and photoinitiator (% of the polyol weight). The diluent was 20% of the polyol weight, which corresponds to approximately 10% of the total prepolymer weight.

The photoinitiator used was a 1: 1 (by weight) mixture of DEAP and TEA. Chain. The present study deals with a new method of covering silica nanoparticles by methyl methacrylate oligomers in the pseudo-liquid state. The adsorption process of metacrylate-containing oligomers on the surface of nanosized silica was studied by .Dispersion of nanodiamond into organic media by the use of fluoroalkyl end-capped oligomers - Applications to surface modification of poly (methyl methacrylate) with the dispersed nanodiamond.