Use of Polymers in Concrete Technology

Aminabhavi, Tejraj M.; Cassidy, Patrick E.; Kukacka, L.E.

doi:10.1080/07366578208081057

Cited by 25 publications

(2 citation statements)

References 45 publications

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“…[1][2][3][4][5][6][7][8][9][10][11][12] The degree of unsaturation, in both polyester polymer and liquid monomer, determines the complexity and the physical characteristics of the crosslinked network. Characteristic properties, such as hardness, shrinkage, water absorption, tensile strength, chemical resistance, and others, can be modified by substitution with glycols and saturated or unsaturated dibasic acids into a polyester polymer.…”

Section: Introductionmentioning

confidence: 99%

“…Characteristic properties, such as hardness, shrinkage, water absorption, tensile strength, chemical resistance, and others, can be modified by substitution with glycols and saturated or unsaturated dibasic acids into a polyester polymer. [1][2][3][4][5][6] Catalysts, such as tetrabutyl titanate, stannous oxalate, dibutyl tin oxide, and phosphoric acid have been used to accelerate an esterification reaction. [11,13] Unsaturated polyester polymer and reactive monomer can be copolymerized into infusible, insoluble, three-dimensional networks through a free radical polymerization/cross-linking mechanism initiated by an organic peroxide or a hydroperoxide.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Tertiary Amines on the Free Radical Copolymerization of Unsaturated Polyester and Styrene

Özeroğlu

2004

Polymer-Plastics Technology and Engineering

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This article gives a discussion of the accelerating effects of tertiary amines in hardening unsaturated polyester. For this purpose, by using 2-methyl-1,3-propandiol, terephthalic acid, and maleic anhydride, an unsaturated polyester polymer was synthesized in a pilot reactor with a heater control. Stannous oxalate was used as an esterification catalyst. The polymer was dissolved in styrene containing a small part of hydroquinone. Cobalt octoate in toluene (1% m/m of Co) or and tertiary amines such as (DMA), (DMPT), (DHEPT), (PTDEA), and (TMEDA) were evaluated as curing ORDER REPRINTS reaction promotors or copromotors for the unsaturated polyester resin by using 1% methyl ethyl ketone peroxide (MEKp, Butanox M60). The increase of cobalt concentration for curing 100 g of unsaturated polyester resin by using 1 mL MEKp reduced gel time and curing time but increased peak exotherm temperature. Tertiary amine promotors, at a constant 1% MEKp and 0.5% cobalt solution catalyst system, were evaluated for efficiency as indicated by decreased gel and cure times: DMPA > DMA ) DHEPT > PTDEA ! TMEDA.

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