A Novel Trans-Esterified Water Soluble Hyperbranched Polymer for Surface Protection of X60 Steel: Experimental and Theoretical Approach

Hyperbranched polymer is a kind of non-linear polymers with highly branched structure and a lot of terminal groups. It has many advantages, such as high reactivity, good solubility and low viscosity. Hyperbranched polymer has become a focus in modern scientific domain. In this paper, polyester-type water-soluble hyperbranched monomer is prepared by the ring-opening polymerization reaction of maleic anhydride with polyol. Hyperbranched polyacrylate emulsion with 70-110nm was synthesized by emulsion polymerization using methyl methacrylate (MMA), butyl acrylate (BA), acrylic acid (AA) and hyperbranched polymer as comonomer. The effects of dosages and adding order of monomers, concentration of initator, type and amount of chain transfer agent on the polymerization are discussed. The as-prepared emusions were analyzed by FTIR, DSC, SEM. The solid content, particle size, stability of emulsion and morphology and water absorption of film were measured. The results showed that hyperbranched polyacrylate emulsion had low viscosity, high stability and can form very flat and smooth film. Hyperbranched polyacrylate emulsion can be widely applied in modern ink industry for its low cost,simple process and stable quality.

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Synthesis and Evaluation of a Water-Soluble Hyperbranched Polymer as Enhanced Oil Recovery Chemical

Journal of Chemistry ◽

10.1155/2013/824785 ◽

2013 ◽

Vol 2013 ◽

pp. 1-11 ◽

Cited By ~ 17

Author(s):

Nanjun Lai ◽

Xiaoping Qin ◽

Zhongbin Ye ◽

Qin Peng ◽

Yan Zhang ◽

...

Keyword(s):

Nmr Spectroscopy ◽

Enhanced Oil Recovery ◽

Oil Recovery ◽

Hyperbranched Polymer ◽

Raw Materials ◽

Retention Rate ◽

Water Soluble ◽

Core Flooding ◽

H Nmr ◽

Initiation System

A novel hyperbranched polymer was synthesized using acrylamide (AM), acrylic acid (AA),N-vinyl-2-pyrrolidone (NVP), and dendrite functional monomer as raw materials by redox initiation system in an aqueous medium. The hyperbranched polymer was characterized by infrared (IR) spectroscopy,1H NMR spectroscopy,13C NMR spectroscopy, elemental analysis, and scanning electron microscope (SEM). The viscosity retention rate of the hyperbranched polymer was 22.89% higher than that of the AM/AA copolymer (HPAM) at 95°C, and the viscosity retention rate was 8.17%, 12.49%, and 13.68% higher than that of HPAM in 18000 mg/L NaCl, 1800 mg/L CaCl2, and 1800 mg/L MgCl2·6H2O brine, respectively. The hyperbranched polymer exhibited higher apparent viscosity (25.2 mPa·s versus 8.1 mPa·s) under 500 s−1shear rate at 80°C. Furthermore, the enhanced oil recovery (EOR) of 1500 mg/L hyperbranched polymer solutions was up to 23.51% by the core flooding test at 80°C.

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Dye-Encapsulation Selectivity of Amphiphilic Dendritic Boxes

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.121-123.717 ◽

2007 ◽

Vol 121-123 ◽

pp. 717-720 ◽

Cited By ~ 1

Author(s):

Cui Hua Liu ◽

Chao Gao ◽

De Yue Yan

Keyword(s):

Molecular Structure ◽

Aqueous Solution ◽

Hyperbranched Polymer ◽

Water Solubility ◽

Water Soluble ◽

Loading Capacity ◽

Hydrophobic Shell

Amphiphilic hyperbranched polyamidoamine (PAMAM) and poly(sulfone-amine) (HPSA) were prepared and their dye-encapsulation properties were investigated. Both of them can carry water-soluble dyes from aqueous solution into chloroform. The selectivity of host to guests and the influence of interaction between different dyes on loading capacity were also investigated by performing comparable experiments. Encapsulation capacities are considered to have relationship with the water-solubility of the hyperbranched polymer core, the polarity difference between the hydrophilic core and the hydrophobic shell, the molecular structure of dyes, and the interactions between dyes.

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