Synthesis of Thermally Stable Polyesters

Mighani, Hossein

doi:10.5772/39224

Cited by 7 publications

(9 citation statements)

References 27 publications

(11 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acssuschemeng.6b00466. 1 H NMR spectra of unpurified TOPERMA-HEA (Figure S1), 1 H NMR spectrum of HEA (Figure S2), 13 C NMR spectrum of TOPERMA (Figure S3), effects of purification of TOPERMA-HEA (Figure S4), feed ratio of TO:HEA (Figure S5), and initiator concentration (Figure S5) on dynamic mechanical properties of cured TOPERMA-HEA resins (PDF)…”

Section: * S Supporting Informationmentioning

confidence: 99%

“…Unsaturated polyester resins (UPRs), the mixture of unsaturated polyesters obtained by the polycondensation of unsaturated and saturated diacids with diols and vinyl comonomers like styrene, are broadly utilized in industrial and domestic areas. , However, due to the uncertainties of petroleum supply and price in the future as well as environmental pollution concerns, there is a growing interest in developing polymeric materials starting from renewable resources, such as natural oils, lignin, carbohydrates, and proteins . Plant oils are an important bioresource because of their low cost, triglyceride structure which is suitable for further chemical manipulation and biodegradability .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tung Oil-Based Unsaturated Co-ester Macromonomer for Thermosetting Polymers: Synergetic Synthesis and Copolymerization with Styrene

Liu

Shang

Jia

et al. 2016

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

A novel unsaturated co-ester (co-UE) macromonomer containing both maleates and acrylates was synthesized from tung oil (TO) and its chemical structure was characterized by FT-IR, 1H NMR, 13C NMR, and gel permeation chromatography (GPC). The monomer was synthesized via a new synergetic modification of TO, by introducing maleic groups first and acrylic groups subsequently onto TO molecules. The influence of experimental factors on thermomechanical properties of the cured bioresins was evaluated to better understand structure–property relationships of the biomaterials and optimize experimental conditions. The obtained TO-based co-UE monomer possessed a highly polymerizable CC functionality, consequently resulting in rigid bioplastics with high cross-link densities (νe) and excellent mechanical properties. For instance, the bioplastic prepared under the optimal synthesis conditions demonstrated a νe of 4.03 × 103 mol/m3, storage modulus at 25 °C of 2.40 GPa, and glass transition temperature (T g) of 127 °C, as well as tensile strength and modulus at 36.3 MPa and 1.70 GPa, respectively. A new theory for determining optimal comonomer concentration was further developed according to the copolymerization equation. The proposed theory accurately predicted the best styrene dosage for the co-UE monomer. At last, the hydroxyethyl acrylate (HEA)-modified TO-based resin was compared with the unmodified one in thermomechanical properties, thermal stability, microstructural morphologies, and curing behaviors. The new co-UE bioresin showed higher CC functionality and cross-link density, superior properties including T g and thermal stability, and similar curing behaviors. The developed eco-friendly rigid biomaterials provide potential application in structural plastics such as sheet molding compounds.

show abstract

Section: * S Supporting Informationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tung Oil-Based Unsaturated Co-ester Macromonomer for Thermosetting Polymers: Synergetic Synthesis and Copolymerization with Styrene

Liu

Shang

Jia

et al. 2016

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…Unsaturated polyester resins (UPRs), which are vital cross-linkable polymeric materials, are extensively used as a matrix for fiber-reinforced composites in a broad range of engineering applications such as construction, automotive, marine, electrical, decorative, and aerospace industry [ 144 , 145 ]. They have the right balance of mechanical, thermal, electrical, and chemical resistant properties, easy processability, low density, and low cost [ 146 , 147 ]. Plant oils are the primary choice between all biomass-derived feedstocks to prepare UPRs with renewable resources, owing to their abundance, low toxicity, biodegradability, and triglyceride structures appropriate for further chemical modification [ 148 , 149 ].…”

Section: Materials Selectionmentioning

confidence: 99%

Recent Progress in Hybrid Biocomposites: Mechanical Properties, Water Absorption, and Flame Retardancy

2020

View full text Add to dashboard Cite

Bio-based composites are reinforced polymeric materials in which one of the matrix and reinforcement components or both are from bio-based origins. The biocomposite industry has recently drawn great attention for diverse applications, from household articles to automobiles. This is owing to their low cost, biodegradability, being lightweight, availability, and environmental concerns over synthetic and nonrenewable materials derived from limited resources like fossil fuel. The focus has slowly shifted from traditional biocomposite systems, including thermoplastic polymers reinforced with natural fibers, to more advanced systems called hybrid biocomposites. Hybridization of bio-based fibers/matrices and synthetic ones offers a new strategy to overcome the shortcomings of purely natural fibers or matrices. By incorporating two or more reinforcement types into a single composite, it is possible to not only maintain the advantages of both types but also alleviate some disadvantages of one type of reinforcement by another one. This approach leads to improvement of the mechanical and physical properties of biocomposites for extensive applications. The present review article intends to provide a general overview of selecting the materials to manufacture hybrid biocomposite systems with improved strength properties, water, and burning resistance in recent years.

show abstract

“…Optimizing mechanical properties were also carried out by varying fiber and filler contents [22][23][24]. Investigations on natural fiber hybrid composites were studied by many researchers by varying its fiber weight content and its effects on the mechanical properties and their characterization [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Coir and Luffa Cylindrica filled with CaCO3 hybrid composites

Krishnudu

Sreeramulu²,

Reddy

2019

IJIE

View full text Add to dashboard Cite

Usage of natural fiber hybrid composites is increasing in the present days because of its eco-friendly and biodegradable nature. Coir fibers were extracted from the plant bark and Luffa Cylindrical were extracted from the vegetable fruit. Later both the fibers were treated with alkaline (5% NaoH) solution to remove the greasy nature over the surface. In the present study, composites were fabricated by using Coir and Luffa Cylindrical along with CaCO3 natural fiber hybrid composites. Each composite is tested for tensile, flexural and impact tests as per the ASTM standards. For sample no. 10, maximum tensile strength of 57 MPa is obtained, whereas sample no.15 has got highest flexural strength of 635 MPa and for impact strength, sample no. 13 has got highest strength of 68 kJ/m 2. The composite specimens were characterized using Fourier transform infrared spectrophotometry (FTIR), scanning electron microscopy (SEM) and thermo-gravimetric analysis (TGA/DTA). SEM illustrated a good bonding between matrix and fibers. TGA illustrated the amount of residue leftover in the composite. FTIR illustrated which compounds are present in the composite.

show abstract

Synthesis of Thermally Stable Polyesters

Cited by 7 publications

References 27 publications

Tung Oil-Based Unsaturated Co-ester Macromonomer for Thermosetting Polymers: Synergetic Synthesis and Copolymerization with Styrene

Tung Oil-Based Unsaturated Co-ester Macromonomer for Thermosetting Polymers: Synergetic Synthesis and Copolymerization with Styrene

Recent Progress in Hybrid Biocomposites: Mechanical Properties, Water Absorption, and Flame Retardancy

Synthesis and Characterization of Coir and Luffa Cylindrica filled with CaCO3 hybrid composites

Contact Info

Product

Resources

About