Modifications and applications of hyperbranched aliphatic polyesters based on dimethylolpropionic acid

Zhang, Xinli

doi:10.1002/pi.2930

Cited by 37 publications

(21 citation statements)

References 217 publications

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“…Most of the synthesized HBEs are based on polyester because of the availability of various monomers to date. For example, a commercially available hyperbranched epoxy with aliphatic polyester backbone (Boltorn E1) has been widely investigated as a toughener for epoxy in the literature [7] . Results showed that the addition of Boltorn E1 into diglycidyl ether of bisphenol A (DGEBA) can increase toughness significantly [8] .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of a hyperbranched polyether epoxy through one-step proton transfer polymerization and its application as a toughener for epoxy resin DGEBA

Meng

et al. 2012

Chin J Polym Sci

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A novel liquid hyperbranched polyether epoxy (HBPEE) based on commercially available hydroquinone (HQ) and 1,1,1-trihydroxymethylpropane triglycidyl ether (TMPGE) was synthesized through an A 2 + B 3 one-step proton transfer polymerization. In order to improve the toughness, the synthesized HBPEE was mixed with diglycidyl ether of bisphenol A (DGEBA) in different ratios to form hybrids and cured with triethylenetetramine (TETA). Thermal and mechanical properties of the cured hybrids were evaluated. Results show that addition of HBPEE can improve the toughness of cured hybrids remarkably at < 20 wt% loading, without compromising the tensile strength. However, the glass transition temperature (T g ) of the cured hybrids decreases with increasing HBPEE content. Fracture surface images from scanning electron microscope show oriented fibrils in hybrids containing HBPEE. The formation and orientation of the fibrils can absorb energy under impact and lead to an improvement of toughness. Furthermore, based on the morphology of fractured surfaces and the single T g in each hybrid, no sign of phase separation was found in the cured hybrid systems. As a result, the toughening mechanism could be explained by in situ homogeneous toughening mechanism rather than phase separation mechanism.

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Section: Introductionmentioning

confidence: 99%

Synthesis of a hyperbranched polyether epoxy through one-step proton transfer polymerization and its application as a toughener for epoxy resin DGEBA

Meng

et al. 2012

Chin J Polym Sci

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“…These structures are extensively studied in the literature for their use as additives, rheology modifiers, and components for blends, coatings, and sensors. 52–54 However, hyperbranched polyesters are surprisingly less explored in the biomedical field, with commercially available Boltorns H x ( x = 20, 30, and 40), based on 2,2-dimethylol propionic acid (Bis-MPA), being the most widely used hyperbranched polyesters at present. 50,55 Today there are no formulations of hyperbranched polyesters, based on naturally occurring metabolites, currently in clinical use.…”

Section: Hydroxy Acid Synthonsmentioning

confidence: 99%

Synthetic Biomaterials from Metabolically Derived Synthons

et al. 2016

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The utility of metabolic synthons as the building blocks for new biomaterials is based on the early application and success of hydroxy acid based polyesters as degradable sutures and controlled drug delivery matrices. The sheer number of potential monomers derived from the metabolome (e.g., lactic acid, dihydroxyacetone, glycerol, fumarate) gives rise to almost limitless biomaterial structural possibilities, functionality, and performance characteristics, as well as opportunities for the synthesis of new polymers. This review describes recent advances in new chemistries, as well as the inventive use of traditional chemistries, toward the design and synthesis of new polymers. Specific polymeric biomaterials can be prepared for use in varied medical applications (e.g., drug delivery, tissue engineering, wound repair, etc.) through judicious selection of the monomer and backbone linkage.

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“…15 Compared with these traditional modiers, hyperbranched polymers have shown great potential. 16,17 With a highly branched structure, ample terminal groups, and inherent cavities, hyperbranched molecules possess advantages over conventional modiers, for example, better miscibility, lower viscosity, and higher reactivity. Generally, aliphatic polyesters backbones are most popular in the design of hyperbranched molecules because of the mature cra of esterication reaction.…”

Section: -4mentioning

confidence: 99%

Simultaneous reinforcement and toughness improvement of an epoxy–phenolic network with a hyperbranched polysiloxane modifier

et al. 2018

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An epoxy-phenolic network is modified with hyperbranched polysiloxane (HBPSi). The addition of HBPSi-2, which has medium molecular weight, can significantly decrease the viscosity of the uncured epoxyphenolic system and increase the crosslinking density and homogeneity of the cured crosslinking network. With 10% HBPSi-2, the mechanical properties of the samples are improved comprehensively: tensile modulus and maximum strength increase by 11.4% and 36.2%, respectively, while elongation at break and impact strength increase by 153.8% and 186.7%, respectively. The comprehensive improvements in the mechanical properties are attributed to combined effects of crosslinking density, network rigidity, cohesive density and the matrix-modifier compatibility. What is more, HBPSi-2 also significantly increases the char yield of the material and decreases the thermal weight loss rate, indicating an improved thermal stability. All these results may provide a new strategy for toughness and strength improvement of the epoxy-phenolic network.

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Modifications and applications of hyperbranched aliphatic polyesters based on dimethylolpropionic acid

Cited by 37 publications

References 217 publications

Synthesis of a hyperbranched polyether epoxy through one-step proton transfer polymerization and its application as a toughener for epoxy resin DGEBA

Synthesis of a hyperbranched polyether epoxy through one-step proton transfer polymerization and its application as a toughener for epoxy resin DGEBA

Synthetic Biomaterials from Metabolically Derived Synthons

Simultaneous reinforcement and toughness improvement of an epoxy–phenolic network with a hyperbranched polysiloxane modifier

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