tailieunhanh - Dendrimers III Episode 2

Tham khảo tài liệu 'dendrimers iii episode 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Hyperbranched Polyesteramides -New Dendritic Polymers Dirk Muscat 1 Rolf A. T. M. van Benthem1 2 3 DSM Research . Box 18 6160 MD Geleen The Netherlands 1 E-mail 2 E-mail Hyperbranched polyesteramides based on commercially attractive monomers have been successfully developed affording polymers with a high number of end groups and especially multifunctionality on the same molecule. Beside hydroxyl and carboxylic acid groups hyperbranched polyesteramides can be modified with a broad variety of other functionalities such as unsaturated groups tertiary amines or long alkyl chains. Thus the concept of the synthesis allows a broad variety of structures and the resulting properties like polarity or viscosity can be adjusted and fine-tuned for a broad number of applications. This enables the hyperbranched polyesteramides to be used in a variety of potential applications such as crosslinkers in coatings as toner resin for dyeing polyolefins as surfactants or in cosmetics. Especially impressive is the disperse dyeing of polypropylene fibers which has been a problem for decades. Hyperbranched polyesteramides based on phthalic anhydride and diisopropanolamine partially functionalized with stearic acid represent amphiphilic molecules which are able to fix the dyes via their polar core and at the same time are compatible with the polypropylene matrix through their long alkyl chains. Keywords. Hyperbranched polyesteramides Polymers Powder coatings Air drying coatings Dyeing polyolefins 1 Introduction. 42 2 General Concept. 43 Hydroxyl Functional Hyperbranched Polyesteramides. 44 Molecular Weight Build-Up. 44 Analysis. 49 Modifications Based on Hydroxyl Functional Hyperbranched Polyesteramides . 51 Esterification with Mono Acids. 51 Properties . 52 3 Carboxylic Acid Functional Hyperbranched Polyesteramides . . . 53 Carboxylic Acid Functional Hyperbranched Polyesteramides Two-Step .

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