Effect of tall oil fatty acids content on the properties of novel hyperbranched alkyd resins

Murillo, Edwin A.; Vallejo, Pedro P.; López, Betty L.

doi:10.1002/app.33502

Cited by 40 publications

(53 citation statements)

References 35 publications

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“…Table 4 presents the results of the gel permeation chromatography (GPC) analysis. The values of number average molar masses (Mn) increased with the proportion of acrylic monomers employed in the synthesis and these are higher than HBR (6611 g/mol) [27] . The great difference between the Mn values of the HBRAA and HBR was due to the synthesis process, since a polymer with high molar mass can be obtained by miniemulsion polymerization [19] .…”

Section: Resultsmentioning

confidence: 97%

“…The difference on PI was possibly due to the miniemulsion polymerization process, which is random, since the acrylic monomers have so many places where they can be grafted. Figure 6 shows the DSC thermograms of the all HBRAA, which presented higher glass transition temperature (T g ) than HBR (-49.8 °C) [27] . The T g values of the HBRAA were as follow: HBRAA1, -24.7 °C, HBRAA2, -16.6 °C, HBRAA3, -14.5 °C and HBRAA4, -12.9 °C.…”

Section: Resultsmentioning

confidence: 99%

“…The synthesis and properties of the HBR were reported in an earlier publication, and it was named HBRA4 [3,27] . The methyl methacrylate (MMA), acrylic acid (AA) and butyl acrylate (BA).…”

Section: Methodsmentioning

confidence: 99%

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Waterborne hyperbranched alkyd-acrylic resin obtained by miniemulsion polymerization

Murillo

López

2016

Polímeros

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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: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

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Waterborne hyperbranched alkyd-acrylic resin obtained by miniemulsion polymerization

Murillo

López

2016

Polímeros

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“…The rheological measurements in solution were performed in a Bohling HRNano rotational rheometer (TA instruments) at a strain of 2% using concentric cylinder geometry. Studies of the HEMMA copolymers film properties (gloss, flexibility, and adherence) were performed according to methodologies reported in previous studies [22][23][24] .…”

Section: Characterization Of the Hea/mma Copolymersmentioning

confidence: 99%

Study of the structural, thermal, rheological and film properties of functional copolymers of hydroxyethyl acrylate and methyl methacrylate

Mejía

Murillo

2016

Polímeros

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SbstractNew functional polymers will be prepared using alkyd resins having high solid content (environmentally friendly) and comb-type structural morphology. Different copolymers of hydroxyethyl acrylate and methyl methacrylate (HEMMA) were synthesized by solution polymerization using azo-bis-(isobutyronitrile) (AIBN) as initiator and dimethylformamide as a solvent. The proportions utilized of AIBN were 0.5 (HEMMA1), 1.0 (HEMMA2), 1.5 (HEMMA3) and 2.0 wt. % (HEMMA4). The conversion percentage of the reaction was higher than 90%. The formation of the copolymers was evidenced by infrared analysis, hydroxyl value, and nuclear magnetic resonance. The intensity of OH group adsorption increased with the molecular weight and hydroxyl value. The polydispersity index was lower than 1.5. All copolymers exhibited a stable region on viscosity at a shear rate between 0.1 and 10 s -1 . The copolymers exhibited good thermal stability, flexibility, and adherence.

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“…CTO has been investigated for production of adhesives [5], paints [6], rubber [7,8], coatings [9,10], biodiesel [11,12], paraffin-rich liquids [13], diesel fuel additives [14], ethylene and propylene [15], etc. A better understanding and information on the thermal and rheological properties of CTO such as viscosity, melting and crystallization are essential engineering parameters for the optimal design of processing equipment and optimization of production methods based on CTO.…”

Section: Introductionmentioning

confidence: 99%

Thermal and Rheological Properties of Crude Tall Oil for Use in Biodiesel Production

Adewale¹,

Christopher²

2017

Processes

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Abstract:The primary objective of this work was to investigate the thermal and rheological properties of crude tall oil (CTO), a low-cost by-product from the Kraft pulping process, as a potential feedstock for biodiesel production. Adequate knowledge of CTO properties is a prerequisite for the optimal design of a cost-effective biodiesel process and related processing equipment. The study revealed the correlation between the physicochemical properties, thermal, and rheological behavior of CTO. It was established that the trans/esterification temperature for CTO was greater than the temperature at which viscosity of CTO entered a steady-state. This information is useful in the selection of appropriate agitation conditions for optimal biodiesel production from CTO. The point of interception of storage modulus (G ) and loss modulus (G ) determined the glass transition temperature (40 • C) of CTO that strongly correlated with its melting point (35.3 • C). The flow pattern of CTO was modeled as a non-Newtonian fluid. Furthermore, due to the high content of fatty acids (FA) in CTO, it is recommended to first reduce the FA level by acid catalyzed methanolysis prior to alkali treatment, or alternatively apply a one-step heterogeneous or enzymatic trans/esterification of CTO for high-yield biodiesel production.

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Effect of tall oil fatty acids content on the properties of novel hyperbranched alkyd resins

Cited by 40 publications

References 35 publications

Waterborne hyperbranched alkyd-acrylic resin obtained by miniemulsion polymerization

Waterborne hyperbranched alkyd-acrylic resin obtained by miniemulsion polymerization

Study of the structural, thermal, rheological and film properties of functional copolymers of hydroxyethyl acrylate and methyl methacrylate

Thermal and Rheological Properties of Crude Tall Oil for Use in Biodiesel Production

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