Hyperbranched polyester polyol modified with polylactic acid as a compatibilizer for plasticized tapioca starch/polylactic acid blends

Mesias, Ricardo; Murillo, Edwin A.

doi:10.1590/0104-1428.09516

Cited by 10 publications

(10 citation statements)

References 34 publications

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“…Also, aliphatic hyperbranced polyester provides good hydrophobic and hydrophilic balance, low viscosity, solubility etc. to structure which is modified [22][23][24][25][26][27][28][29][30][31]. For these reasons, aliphatic hyperbranched polyester was chosen as the carrier for p-carborane used as a biomaterial.…”

Section: Resultsmentioning

confidence: 99%

“…Murillo and coworkers [27] synthesized hyperbranched alkyd resins from 4 th generation HBP modified with tall oil fatty acids. Murillo and Mesias [28] also modified second generation HBP with polylactic acid to obtain a compatibilizer agent for plasticized tapioca starch/polylactic acid blends. Hyperbranched polyesters having end hydroxyl groups were combined with fatty acids or acrylate used as various resins in coating applications [6,[29][30][31].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Carborane-Functionalized Hyperbranched Polyester

Özçayan¹,

Şahin²,

Söylemez³

et al. 2021

Journal of Boron

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The purpose of this study is to synthesize new boron containing carrier compound for Boron Neutron Capture Therapy (BNCT) which is two-component radiation therapy method that especially is promising for the treatment of brain tumors and is being actively researched in many countries. For this research hyperbranched polyester (HBP), bifunctional p-carborane and carborane-functionalized HBP were synthesized. Dipentaerythritol was chosen as a core molecule of the HBP and esterified with dimethylol propionic acid. Observed characteristic ester bands and OH stretching band in the FTIR spectrum and the methyl & methylene peaks in the 1 H NMR spectrum of HBP indicated that hyperbranched polyester synthesis was done successfully. A bifunctionalized p-carborane containing an acid group and a benzyl ether protected alcohol was prepared in three-step reactions. As a result of these reactions, a bifunctionalized p-carborane compound was produced with 60% yield. Then, the HBP was esterified with the bifunctional p-carborane. The characterization of the synthesized compounds was determined by FTIR and NMR spectra. The synthesis of carborane-functionalized HBP was confirmed by disappearance of HBP's OH groups and B-H stretching band observed in the FTIR spectrum of carborane-functionalized HBP and in addition, appearance of proton signals of HBP core, carborane linker and peripheral-protecting groups in the 1 H-NMR spectrum. Finally, synthesized water-soluble carborane-containing HB carrying many boron atoms should be served as potential BNCT agents.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Carborane-Functionalized Hyperbranched Polyester

Özçayan¹,

Şahin²,

Söylemez³

et al. 2021

Journal of Boron

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“…The same behavior was reported to the TPS/PLA blends, which were compatibilized with MLO, 16 and a hyperbranched polyester polyol modified with PLA. 36 The melting enthalpy (ΔH m ) values of B50GE0 and B50GE5 blends (Table 2) were higher than that of PLA, but that of the B70 followed an opposite behavior. The other blends did not show ΔH m , which also has been observed to TPS/PLA blends activated with epoxidized cardoon oil plasticizer.…”

Section: Dsc Analysismentioning

confidence: 94%

An approach for the compatibility of thermoplastic starch/poly (lactic acid) blends using an ester obtained from glycerol and tall oil fatty acids

Murillo

Ararat

2022

J of Applied Polymer Sci

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This work reports the compatibilization of thermoplastic starch (TPS)/polylactic acid (PLA) blends with a glycerol ester (GE), obtained by modifying glycerol with tall oil fatty acids. The proportions of TPS/PLA studied were 50/50 and 70/30, with the GE amounts from 0 (control sample), 5, 10, 15, and 20 wt%. The effect of the compatibilizer on the structural, thermal, rheological, morphological, mechanical and biodegradation properties of the blends was evaluated. Ultraviolet visible (UV–Vis) analysis of the blends showed that GE improved the light transmission resistance of the materials. The presence of GE resulted in decreased glass transition temperature (Tg) and complex viscosity (η*) values for the blends as opposed to the control sample. Furthermore, η* decreased with the increase in GE content and the η* values were lower than 105 Pa.s. Scanning electronic microscopy analysis revealed that GE improved the interfacial adhesion between TPS and PLA. The tensile modulus (149–414 MPa), tensile strength (5.60–11.6 MPa) and the biodegradability of the blends decreased with GE content, but the water resistance showed an opposite behavior. The GE acted as a plasticizer, compatibilizer and antioxidant for TPS/PLA blends.

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“…Compared with linear polymers, hyperbranched polymers (HBPs) have a highly branched three‐dimensional structure, 28 a large number of active terminal groups, higher solubility and low melt viscosity, 29 thus HBPs were widely used in polymer modification 30–32,21,33,34,29 . Studies 32,33,35 have indicated that the terminal functional groups of HBPs can be used as proton donors or receptors to act on the resin, hydrogen bonding effect was generated between HBPs and the blended resins.…”

Section: Introductionmentioning

confidence: 99%

Toughening of poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) by phenyl terminated hyperbranched polyesters with higher thermal stability

Jin

Huang

et al. 2021

J of Applied Polymer Sci

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Phenyl terminated hyperbranched polyesters (HBP‐Bs) were synthesized based on Boltorn‐type hydroxyl terminated HBPEs and characterized by Fourier transform infrared spectroscopy, nuclear magnetic resonance, gel permeation chromatography, and so forth. The prepared HBP‐Bs were used to toughen poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) (PHBV) directly by melt blending. The thermal properties, rheological properties, mechanical properties, and microstructure of the PHBV/HBP‐Bs blends were studied in detail. Comparing with pure PHBV, the crystallinity of the PHBV/0.5 phr HBP‐Bs blends decreased by 14.10% (from 64.39% to 55.04%), the impact strength increased by 158.30% (from 7.41 kJ·m−2 to 19.14 kJ·m−2), and the elongation at break increased by 400.00% (from 0.91% to 4.55%). It can be seen from the scanning electron microscope that the fracture surface of the PHBV/HBP‐Bs blends became rough with the increase of HBP‐Bs, even with large filamentous structures and tiny holes, which further demonstrated that HBP‐Bs acted as an excellent toughening effect on PHBV.

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Hyperbranched polyester polyol modified with polylactic acid as a compatibilizer for plasticized tapioca starch/polylactic acid blends

Cited by 10 publications

References 34 publications

Synthesis and Characterization of Carborane-Functionalized Hyperbranched Polyester

Synthesis and Characterization of Carborane-Functionalized Hyperbranched Polyester

An approach for the compatibility of thermoplastic starch/poly (lactic acid) blends using an ester obtained from glycerol and tall oil fatty acids

Toughening of poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) by phenyl terminated hyperbranched polyesters with higher thermal stability

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