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  • Articles  (138)
  • Emerald
  • 2000-2004  (138)
  • Chemistry and Pharmacology  (138)
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  • Articles  (138)
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  • 1
    Electronic Resource
    Electronic Resource
    Bingley : Emerald
    Pigment & resin technology 33 (2004), S. 152-159 
    ISSN: 0369-9420
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: New types of amide polymers have been prepared and evaluated as corrosion inhibitors for steel protection. Such polymers included o-, m-, and p- itaconyl phenylene amides, itaconyl o- tolidine amide and maleiyl phenylene amide polymers. The polymers were prepared by condensation of equimolar ratios of diamine with itaconic or maleic acids in non-polar solvents of high boiling point (〉135°C) using the Dean and Stark apparatus. The amide polymers obtained were characterised and their structures confirmed based on the micro-analysis of C, H, and N, the estimated amount of water liberated from the condensation reaction, the IR spectrophotometric measurements and the molecular weight determined by gel permeation chromatography (GPC). The amide polymers obtained were incorporated into paint formulations as corrosion inhibitors for steel protection.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0369-9420
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Long afterglow Sr2MgSi2O7 (SMS) phosphor was prepared by Douby's methods at high temperature and reductive atmosphere. The excitation and emission spectra of this phosphor showed that both had broad bands and that the main emission peak at 469?nm was due to 4f-5d transitions of Eu+2 and implied that the luminescence centres Eu+2 occupied the Sr+2 sites in the Sr2MgSi2O7 host. The phosphor doped only with Eu ions did not demonstrate the long afterglow phenomenon, but when co-doped with Dy+3 ions in the SMS matrix, significant long afterglow was observed.
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  • 3
    Electronic Resource
    Electronic Resource
    Bingley : Emerald
    Pigment & resin technology 33 (2004), S. 238-244 
    ISSN: 0369-9420
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Recent years have seen a rapid development of ink-jet printing technology. This paper reviews the state-of-the-art in ink-jet printing technology and gives an overview of ink-jet printing into the immediate future. The focus is placed on various applications of jet printing technology. The potential of applying jetting technology in the conventionally surface coating dominated applications will also be explored.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 0369-9420
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Itaconic acid was reacted with phenylene diamine (ortho, meta and para) and o-tolidine in boiling dekalin, using Dean and Stark apparatus. The polymers prepared were evaluated for their suitability as antioxidants for natural rubber vulcanizates. The amide polymers prepared showed high efficiency as antioxidants for rubber vulcanizates, exceeding the performance of commercial antioxidants. In addition, the results obtained are encouraging and support the use of these polymers from both the environmental and economical points of view.
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  • 5
    Electronic Resource
    Electronic Resource
    Bingley : Emerald
    Pigment & resin technology 32 (2003), S. 300-306 
    ISSN: 0369-9420
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: This paper reviews the self-stratifying coatings concept, which is a tool to formulate film-forming compositions based on incompatible polymer blends capable of producing coatings having polymer/polymer composite structures and outstanding performance in a number of application fields. The self-stratifying concept is applicable to waterborne, solvent-based and powder coatings, requiring specific formulations and frequently also conditions of application and film formation. Micro-heterogeneous and non-homogeneous-in-layer (or ultimately double-layer) film structures obtained by one-coat application of a single coating composition render considerable enhancement in coatings properties (mechanical, protective etc.) particularly various surface/interfacial properties (e.g. scratch-resistance, mar-resistance and adhesion durability, etc.).
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  • 6
    Electronic Resource
    Electronic Resource
    Bingley : Emerald
    Pigment & resin technology 32 (2003), S. 307-318 
    ISSN: 0369-9420
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Recent years have seen a significant increase in the use of inkjet technology for printing on textile fabrics. Typical inkjet printed textile products included curtains, large advertising posters, flags and banners. As a result of the need for such inkjet printed products to have a greater durability, especially for outdoor applications, inks containing pigments as the colourants are gaining more interests. However, pigments may give rise to logistical problems in terms of their dispersion stability within the ink formulation, consequently blocking the nozzles within the inkjet print head. This paper reports methods for the preparation of pigment dispersions and of inkjet printing ink formulations and the methods for the evaluation of the suitability of pigmented ink formulations for jet printing on textile materials. In particular, the suitability of three magenta pigments for inkjet inks were assessed and reported.
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  • 7
    Electronic Resource
    Electronic Resource
    Bingley : Emerald
    Pigment & resin technology 32 (2003), S. 364-370 
    ISSN: 0369-9420
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A comparison of the difference in chemical nature of re-dispersible polymer powders useful for the modification of cement based compositions is made. Core-shell acrylic lattices synthesised by multi-step sequential polymerisation are formulated and spray-dried to obtain re-dispersible powders. The heterogeneous acrylic copolymers prepared are characterised by excellent re-dispersibility, high chemical stability and good application properties.
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  • 8
    Electronic Resource
    Electronic Resource
    Bingley : Emerald
    Pigment & resin technology 33 (2004), S. 206-210 
    ISSN: 0369-9420
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A soluble polyschiff base containing triarylamine unit in backbone was synthesised by condensation polymerisation. The hole transport properties of such polyschiff base were studied. The mobility of the hole carrier in the polyschiff base film was also measured and found to be µ=1.68×10-4?cm2/V?s by means of time of flight technique. A polymer electroluminescence device was prepared with the polyschiff base used as hole transporting moiety by spin coated.
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  • 9
    Electronic Resource
    Electronic Resource
    Bingley : Emerald
    Pigment & resin technology 33 (2004), S. 272-279 
    ISSN: 0369-9420
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The market for ultraviolet curing technology has been growing at double-digit rates in the last 10 years. The main reason for such a rapid technological growth of UV curing is its unique process characteristic, which allow UV-coating to be applied on virtually any substrates, including plastic, metal, composite, wood, paper, leather, vinyl, glass, magnetic recording tape and even human teeth. The original driving forces behind the commercialisation of UV-technology were energy saving and freedom from solvents. These benefits are complemented by high productivity and subsequently higher profits that can be achieved with the increased line speed, just-in-time benefits and immediate "pack and ship" capabilities. This paper gives a review of the development of the UV curing technology, with emphasis placed on relevant chemistry.
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  • 10
    Electronic Resource
    Electronic Resource
    Bingley : Emerald
    Pigment & resin technology 33 (2004), S. 293-301 
    ISSN: 0369-9420
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Commercial pressure has forced improvements in the reduction of press down time. One restraining factor for the flexographic printing process has been the lack of predictability and consistency. The results of a factorial designed experiment, are reported in this paper. Investigations into the complex interactions of many variable factors that take place during the printing process were carried out. Various statistical methods were employed for the design of the experiment and for the interpretation of experimental data generated. The results of the investigation have been used to optimise the flexographic printing techniques to significantly manipulate the properties of various production components for the end-use application to enhance the plates printing performance and consistency.
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