Plasticizing effect of biodegradable dipropylene glycol bibenzoate and epoxidized linseed oil on diglycidyl ether of bisphenol A based epoxy resin

Okoro, Chinedu; Mohammed, Zaheeruddin; Jeelani, Shaik; Rangari, Vijaya K.

doi:10.1002/app.50661

Cited by 7 publications

(7 citation statements)

References 52 publications

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“…These findings were in accordance with literature data, reporting that the incorporation of a plasticizer into an epoxy matrix results to a reduced storage modulus (Figure 25). 32–36 …”

Section: Resultsmentioning

confidence: 99%

Manufacturing technology and dynamic mechanical investigation of moisture‐resistant Luffa cylindrica‐reinforced epoxy composites

Papanicolaou

Zaoutsos

Anastasiou

2021

J of Applied Polymer Sci

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Natural fiber (NF)‐reinforced thermosetting composites exhibit excellent properties but, due to the usually hygroscopic nature of the fibers, these composites may suffer from the effects of moisture absorption. Luffa cylindrica is a NF, potentially useful in the manufacture of composite materials, but it is highly hygroscopic. A technology is developed for the fabrication of moisture‐resistant L. cylindrica‐reinforced epoxy composites and the various parameters that affect the process are investigated using long‐term moisture absorption experiments and dynamic mechanical analysis of dry and moist specimens. The technology concludes to a L. cylindrica‐reinforced bilayer matrix made of a first linseed oil‐modified precured epoxy and a final unmodified epoxy layer. This composite offers a reduced water absorbance by 33% and an almost identical Tg compared to the non‐modified epoxy reinforced with L. cylindrica. The same technology is used to manufacture water‐resistant L. cylindrica‐reinforced composites from both, environmentally friendly, matrix and reinforcement.

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“…These findings were in accordance with literature data, reporting that the incorporation of a plasticizer into an epoxy matrix results to a reduced storage modulus (Figure 25). 32–36 …”

Section: Resultsmentioning

confidence: 99%

Manufacturing technology and dynamic mechanical investigation of moisture‐resistant Luffa cylindrica‐reinforced epoxy composites

Papanicolaou

Zaoutsos

Anastasiou

2021

J of Applied Polymer Sci

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“…A combination of information about the chemical structures presents in organic compounds, and the behavior of functional groups during their polymerization reactions (Okoro, 2021;Lorwanishpaisarn, 2021;Coates, 2000) can be obtained by using the spectroscopy technique in the infrared region.…”

Section: Absorption Spectroscopy In the Infrared Regionmentioning

confidence: 99%

Avaliação do Comportamento Mecânico e de Cura da Resina Epóxi em Compósito Reforçado com Aramida/Vidro

Valença

Sussuchi

Griza

et al. 2021

RSD

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A resina epóxi DGEBA possui uma ampla utilização na fabricação de compósitos poliméricos, para obtenção de diversos elementos da engenharia estrutural. As propriedades mecânicas podem ser previstas pelo conhecimento físico-químico das condições de processamento dos componentes da resina, além de suas condições de acondicionamento e manuseio. Esse estudo teve como objetivo caracterizar os grupos funcionais, como também o comportamento de cura de um lote da resina com diferentes tempos de acondicionamento e controle de armazenamento, utilizando espectroscopia por FTIR. A resina foi utilizada na matriz dos compósitos com reforço têxtil, para os quais se analisou o comportamento mecânico através dos ensaios de impacto e tração. Percebeu-se que o efeito da degradação na estrutura do polímero leva a uma redução da resistência a tração e energia de impacto do compósito.

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“…The biological degradation of polyethylene terephtalate is one of the recent innovations that have opened the views to promising future studies in this area [ 16 ]. Different biodegradable materials have been introduced in the past years [ 17 ]. Aliphatic esters such as polyhydroxyalkanoate (PHA) and polylactic acid (PLA) have been recognized as valuable alternatives to petro-plastics [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Biodegradation Test of a New Polyether Polyurethane Foam Produced from PEG 400, L-Lysine Ethyl Ester Diisocyanate (L-LDI) and Bis-hydroxymethyl Furan (BHMF)

Olivito

Jagdale²,

Oza

2023

Toxics

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In this paper we produced a bio-based polyether-polyurethane foam PU1 through the prepolymer method. The prepolymer was obtained by the reaction of PEG 400 with L-Lysine ethyl ester diisocyanate (L-LDI). The freshly prepared prepolymer was extended with 2,5-bis(hydroxymethyl)furan (BHMF) to produce the final polyurethane. The renewable chemical BHMF was produced through the chemical reduction of HMF by sodium borohydride. HMF was produced by a previously reported procedure from fructose using choline chloride and ytterbium triflate. To evaluate the degradation rate of the foam PU1, we tested the chemical stability by soaking it in a 10% sodium hydroxide solution. The weight loss was only 12% after 30 days. After that, we proved that enzymatic hydrolysis after 30 days using cholesterol esterase was more favoured than hydrolysis with NaOH, with a weight loss of 24%, probably due to the hydrophobic character of the PU1 and a better adhesion of the enzyme on the surface with respect to water. BHMF was proved to be of crucial importance for the enzymatic degradation assay at 37 °C in phosphate buffer solution, because it represents the breaking point inside the polyurethane chain. Soil burial degradation test was monitored for three months to evaluate whether the joint activity of sunlight, climate changes and microorganisms, including bacteria and fungi, could further increase the biodegradation. The unexpected weight loss after soil burial degradation test was 45% after three months. This paper highlights the potential of using sustainable resources to produce new biodegradable materials.

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Plasticizing effect of biodegradable dipropylene glycol bibenzoate and epoxidized linseed oil on diglycidyl ether of bisphenol A based epoxy resin

Cited by 7 publications

References 52 publications

Manufacturing technology and dynamic mechanical investigation of moisture‐resistant Luffa cylindrica‐reinforced epoxy composites

Manufacturing technology and dynamic mechanical investigation of moisture‐resistant Luffa cylindrica‐reinforced epoxy composites

Avaliação do Comportamento Mecânico e de Cura da Resina Epóxi em Compósito Reforçado com Aramida/Vidro

Synthesis and Biodegradation Test of a New Polyether Polyurethane Foam Produced from PEG 400, L-Lysine Ethyl Ester Diisocyanate (L-LDI) and Bis-hydroxymethyl Furan (BHMF)

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