Effect of molecular weight on the physical properties of poly(ethylene brassylate) homopolymers

Fernández, Jorge Sobral; Amestoy, Hegoi; Sardón, Haritz; Aguirre, Miren; Varga, Aitor Larrañaga; Sarasua, Jose‐Ramon

doi:10.1016/j.jmbbm.2016.07.031

Cited by 38 publications

(47 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This behavior is not surprising, and it was reported in the literature. [22] With catalyst 1, the observed trend of reactivity was the following: HDL > PDL @ EB.…”

Section: Homopolymerization Of Macrolactonesmentioning

confidence: 96%

See 1 more Smart Citation

Synthesis of Semi‐Aromatic Di‐Block Polyesters by Terpolymerization of Macrolactones, Epoxides, and Anhydrides

et al. 2021

View full text Add to dashboard Cite

In this contribution, the catalytic behavior of a phenoxy-imine aluminum catalyst and of a bimetallic salen aluminum complex in ring-opening polymerization (ROP) of macrolactones such as ω-pentadecalactone (PDL), ω-6-hexadecenlactone (HDL) and ethylene brassylate (EB), and in the ring-opening copolymerization (ROCOP) of cyclohexene oxide (CHO) and phthalic anhydride (PA) is described. A significant difference in terms of activity emerged between the two catalysts in the ROP of the macrolactones, while similar behaviors were observed in the ROCOP process. The synthesis of diblock polyesters, by combination of two distinct processes, was performed in a onepot procedure. The semi-aromatic polyester block was formed first, followed by the polyethylene-like portion produced by ROP of macrolactones.

show abstract

“…This behavior is not surprising, and it was reported in the literature. [22] With catalyst 1, the observed trend of reactivity was the following: HDL > PDL @ EB.…”

Section: Homopolymerization Of Macrolactonesmentioning

confidence: 96%

“…[21] One drawback of this monomer is in the difficulties to achieve high molecular masses by conventional ROP catalysis. [22] Polymerization data are summarized in Table 1. The polymers produced were all characterized by 1 H NMR, GPC and MALDI-ToF-MS analyses.…”

Section: Homopolymerization Of Macrolactonesmentioning

confidence: 99%

Synthesis of Semi‐Aromatic Di‐Block Polyesters by Terpolymerization of Macrolactones, Epoxides, and Anhydrides

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Ethylene brassylate (EB) is one of the most commonly seen macrolactones. Fortunately, a novel catalyst such as triphenyl bismuth has been applied for the ROP of macrolactones and high molecular weights have been achieved . Poly(ethylene brassylate) (PEB) has poly(ε‐caprolactone)‐like properties with low T g (−30 °C) and excellent toughness (elongation at break higher than 1000%), which makes PEB an ideal mid‐block component of triblock copolymers.…”

Section: Introductionmentioning

confidence: 99%

Fully biobased biodegradable poly(l‐lactide)‐b‐poly(ethylene brassylate)‐b‐poly(l‐lactide) triblock copolymers: synthesis and investigation of relationship between crystallization morphology and thermal properties

Jin

Leng

Zhang

et al. 2020

Polymer International

View full text Add to dashboard Cite

Well‐defined poly(l‐lactide‐b‐ethylene brassylate‐b‐l‐lactide) (PLLA‐b‐PEB‐b‐PLLA) triblock copolymer was synthesized by using double hydroxyl‐terminated PEBs with different molecular weights. Gel permeation chromatography and NMR characterization were employed to confirm the structure and composition of the triblock copolymers. DSC, wide‐angle X‐ray diffraction, TGA and polarized optical microscopy were also employed to demonstrate the relationship between the composition and properties. According to the DSC curves, the cold crystallization peak vanished gradually with decrease of the PLLA block, illustrating that the relatively smaller content of PLLA may lead to the formation of a deficient PLLA type crystal, leading to a decrease of melting enthalpy and melting temperature. Multi‐step thermal decompositions were determined by TGA, and the PEB unit exhibited much better thermal stability than the PLLA unit. Polarized optical microscopy images of all the triblock samples showed that spherulites which develop radially and with an extinction pattern in the form of a Maltese cross exhibit no ring bond. The growth rate of the spherulites of all triblock samples was investigated. The crystallization capacity of PLLA improved with incorporation of PLLA, which accords with the DSC and wide‐angle X‐ray diffraction results. © 2019 Society of Chemical Industry

show abstract

“…In this context, several studies [ 33 – 35 ] have demonstrated that bismuth compounds belong to the group of least toxic heavy metal compounds, while Bi 3+ performed even better than Zn 2+ . Moreover, it was found that Ph 3 Bi catalyzes the formation of high molecular masses as demonstrated in [ 8 , 36 , 37 ], which may be a limitation of other catalysts. The viscous nature of EDL was found to facilitate simple coating processes such as dip and spin-coating.…”

Section: Discussionmentioning

confidence: 99%

Analysis of a poly(ε-decalactone)/silver nanowire composite as an electrically conducting neural interface biomaterial

Krukiewicz

Fernández²,

Skorupa

et al. 2019

BMC biomed eng

Self Cite

View full text Add to dashboard Cite

Background Advancement in polymer technologies, facilitated predominantly through chemical engineering approaches or through the identification and utilization of novel renewable resources, has been a steady focus of biomaterials research for the past 50 years. Aliphatic polyesters have been exploited in numerous biomedical applications including the formulation of soft-tissue sutures, bone fixation devices, cardiovascular stents etc. Biomimetic ‘soft’ polymer formulations are of interest in the design of biological interfaces and specifically, in the development of implantable neuroelectrode systems intended to interface with neural tissues. Critically, soft polymer formulations have been shown to address the challenges associated with the disregulation of mechanotransductive processes and micro-motion induced inflammation at the electrode/tissue interface. In this study, a polyester-based poly(ε-decalactone)/silver nanowire (EDL:Ag) composite was investigated as a novel electrically active biomaterial with neural applications. Neural interfaces were formulated through spin coating of a polymer/nanowire formulation onto the surface of a Pt electrode to form a biocompatible EDL matrix supported by a percolated network of silver nanowires. As-formed EDL:Ag composites were characterized by means of infrared spectroscopy, scanning electron microscopy and electrochemical methods, with their cytocompatibility assessed using primary cultures of a mixed neural population obtained from the ventral mesencephalon of Sprague-Dawley rat embryos. Results Electrochemical characterization of various EDL:Ag composites indicated EDL:Ag 10:1 as the most favourable formulation, exhibiting high charge storage capacity (8.7 ± 1.0 mC/cm 2 ), charge injection capacity (84.3 ± 1.4 μC/cm 2 ) and low impedance at 1 kHz (194 ± 28 Ω), outperforming both pristine EDL and bare Pt electrodes. The in vitro biological evaluation showed that EDL:Ag supported significant neuron viability in culture and to promote neurite outgrowth, which had the average length of 2300 ± 6 μm following 14 days in culture, 60% longer than pristine EDL and 120% longer than bare Pt control substrates. Conclusions EDL:Ag nanocomposites are shown to serve as robust neural interface materials, possessing favourable electrochemical characteristics together with high neural cytocompatibility.

show abstract

Effect of molecular weight on the physical properties of poly(ethylene brassylate) homopolymers

Cited by 38 publications

References 35 publications

Synthesis of Semi‐Aromatic Di‐Block Polyesters by Terpolymerization of Macrolactones, Epoxides, and Anhydrides

Synthesis of Semi‐Aromatic Di‐Block Polyesters by Terpolymerization of Macrolactones, Epoxides, and Anhydrides

Fully biobased biodegradable poly(l‐lactide)‐b‐poly(ethylene brassylate)‐b‐poly(l‐lactide) triblock copolymers: synthesis and investigation of relationship between crystallization morphology and thermal properties

Analysis of a poly(ε-decalactone)/silver nanowire composite as an electrically conducting neural interface biomaterial

Contact Info

Product

Resources

About