Grafting sites of acrylic mixed monomers onto unsaturated fatty acids: Part 2

Dziczkowski, Jamie; Dudipala, Venkat; Soucek, Mark D.

doi:10.1016/j.porgcoat.2010.12.006

Cited by 22 publications

(14 citation statements)

References 20 publications

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“…NMR analysis shown that acrylic groups were grafted into the polyester backbone of the alkyd via the hydrogen abstraction of the glycerol. It was also determined that the choice of initiator has no effect on graft location, but the system initiated with BPO provided spectral evidence that the BPO can directly abstract the doubly allylic hydrogen of fatty acids presents in the alkyd [23] . Alkyd-acrylic hybrids having final solids content of 75-80% were prepared by dropping alkyd resin (75 wt% of fatty acid based on the total alkyd) into an acrylic dispersion.…”

Section: Introductionmentioning

confidence: 99%

Waterborne hyperbranched alkyd-acrylic resin obtained by miniemulsion polymerization

Murillo

López

2016

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SbstractFour waterborne hyperbranched alkyd-acrylic resins (HBRAA) were synthesized by miniemulsion polymerization from a hyperbranched alkyd resin (HBR), methyl methacrylate (MMA), butyl acrylate (BA) and acrylic acid (AA), by using benzoyl peroxide (BPO) and ammonium persulfate (AP) as initiators. The reaction between HBR and acrylic monomers was evidenced by differential scanning calorimetric (DSC), nuclear magnetic resonance (NMR) and gel permeation chromatography (GPC). The conversion percentage, glass transition temperature (T g ), content of acrylic polymer (determined by soxhlet extraction) and molecular weight increased with the content of acrylic monomers used in the synthesis. The main structure formed during the synthesis was the HBRAA. The analysis by dynamic light scattering (DLS) showed that the particle size distribution of HBRAA2, HBRAA3 and HBRAA4 resins were mainly monomodal. The film properties (gloss, flexibility, adhesion and drying time) of the HBRAA were good.

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Section: Introductionmentioning

confidence: 99%

Waterborne hyperbranched alkyd-acrylic resin obtained by miniemulsion polymerization

Murillo

López

2016

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“…Для досягнення високого виходу АК каталізатор повинен мати й основні, і кислотні властивості. Внаслідок цього ряд наукових робіт присвячено розробці модифікованих кислотноосновних каталізаторів біфункціонального типу [4][5][6][7]. Слід зазначити, що окрім якісного, кількісного складу та кислотно-основних властивостей гетерогенних каталізаторів дуже важливими їхніми характеристиками є площа поверхні та порувата структура.…”

Section: вступunclassified

Kinetics of aldol condensation of acetic acid with formaldehyde on B–P–V–W–OX/SiO2 catalyst

Pavliuk¹,

Ivasiv²,

Orobchuk³

et al. 2020

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New catalysts B–P–V–W–Ox/SiO2 of gas-phase condensation of acetic acid from formaldehyde to acrylic acid on an industrial carrier of stable chemical composition (colloidal silicon oxide, Aerosil A-200) were synthesized. It is shown that the hydrothermal treatment of the carrier allows to increase the activity and selectivity of the catalyst in the reactions of aldol condensation of acetic acid with formaldehyde. It was found that the developed catalyst is effective in the condensation reaction of acetic acid with formaldehyde, which allows to obtain acrylic acid with a yield of 68.7% and a selectivity of 94.1%. The kinetic regularities of the reaction on this catalyst are established. According to the proposed kinetic equations, kinetic parameters are calculated that describe the condensation reaction of acetic acid with formaldehyde.

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“…To identify the specific graft locations, 1D and 2D NMR spectroscopy techniques were utilized (40,41). It was found that grafting between the acrylic and alkyd phases was achieved by hydrogen abstraction at methylene positions found on the fatty acid chains (Figure 7), along with side reactions by abstraction of hydrogens along the polyol segment of the polyester backbone.…”

Section: Acrylic-alkyd Hybridmentioning

confidence: 99%