Chemical recycling of post-consumer PET: Alkyd resins synthesis

Dullius, Jeane; Ruecker, Carlo; Oliveira, Vitoria Castro da Cruz; Ligabue, Rosane Angélica; Einloft, Sandra

doi:10.1016/j.porgcoat.2006.07.004

Cited by 70 publications

(59 citation statements)

References 6 publications

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“…PET waste can be depolymerized by transesterification using various agents, such as water (hydrolysis), acids or bases [7,8], alcohols (alcoholysis) [9][10][11], amines (aminolysis) [12], and glycols (glycolysis) [13][14][15][16]. Raw or purified materials obtained in that way can be used for the synthesis of a polyester resins [17][18][19], epoxy resins [20,21], polyurethane resins [22][23][24], and alkyd resins [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Effect of the modified silica Nanofiller on the Mechanical Properties of Unsaturated Polyester Resins Based on Recycled Polyethylene Terephthalate

et al. 2015

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Unsaturated polyester resin (UPe)-based nanocomposites and fumed silica Aerosil R812S, R805 and R816, and R200 modified with phenyl terminal group, R200NPh, were prepared. UPe resins were synthesized from maleic anhydride and products of glycolysis, obtained by polyethylene terephthalate depolymerization with dipropylene glycol in the presence of tetrabutyl titanate catalyst. The obtained unsaturated polyesters were characterized by acid, hydroxyl, and iodine values and by FTIR and NMR analysis. The microstructural analysis of the prepared nanocomposites, performed by using transmission electron microscopy, confirmed that silica nanoparticles formed chain-like aggregates in the polymer matrix. The presence of modified silica nanoparticles had no influence on the glass transition temperature and thermal stability of polyester matrix.

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Section: Introductionmentioning

confidence: 99%

Effect of the modified silica Nanofiller on the Mechanical Properties of Unsaturated Polyester Resins Based on Recycled Polyethylene Terephthalate

et al. 2015

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“…The largest fraction of polymers wastes consist of polyolefins, such as polyethylene (PE) and polypropylene (PP) [1], therefore recycling is an alternative destination for these materials. However, to obtain products from recycled material may be necessary specific properties that are not present in original plastic [2]. The environment friendly alternative way to the modification of some properties of polymers is the utilization of natural fibers forming composite materials, and this area presented a crescent development in the last 20 years [3].…”

Section: Introductionmentioning

confidence: 99%

Chemical, morphological and mechanical analysis of sisal fiber-reinforced recycled high-density polyethylene composites

Fávaro¹,

Ganzerli²,

Neto³

et al. 2010

Express Polym. Lett.

137

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Abstract. Natural fibers are widely used as plastic composite material reinforcements. In this work, composites of postconsumer high-density polyethylene (HDPE) reinforced with sisal fibers were prepared. PE and sisal fibers were chemically modified to improve their compatibilities, try to increase the hydrophobic character of the sisal fiber and hydrophilic character HDPE. Sisal was mercerized with a NaOH solution and acetylated and the PE was oxidized with KMnO4 solution. The chemically modified fibers were characterized by Fourier Transformed Infrared Spectroscopy (FTIR) and 13 C Nuclear Magnetic Resonance Spectroscopy ( 13 C NMR). The composites were prepared by extrusion of modified and unmodified materials containing either 5 or 10 wt% fibers. The morphology of the obtained materials was evaluated by SEM. The fiber chemical modification improves it adhesion with matrix, but not benefit were obtained with HDPE oxidation. Flexural and impact tests demonstrated that the composites prepared with modified sisal fibers and unmodified PE present improved mechanical performance compared to pure PE.

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“…Oil based alkyds are perhaps the most widely used industrial protective coating material by virtue of their ease of application, relatively low cost, color stability, and good weather ability in most atmospheric environments [22][23][24]. Therefore, it is reasonable to assume that coating formulators would seek to improve properties of the drying oil alkyd by modification with conducting polymer.…”

Section: Introductionmentioning

confidence: 99%