scholarly journals Thermomechanical Properties of SiC-Filled Polybutylene Succinate Composite Fabricated via Melt Extrusion

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 418 ◽  
Author(s):  
Zelalem Chernet Lule ◽  
Eyob Wondu Shiferaw ◽  
Jooheon Kim
Keyword(s):  
Morphological Analysis ◽  
Thermomechanical Properties ◽  
Melt Extrusion ◽  
Good Adhesion ◽  
Degradation Temperature ◽  
Sic Particles ◽  
Mass Fractions ◽  
Polybutylene Succinate ◽  
Filler Dispersion ◽  
Thermal Degradation Temperature

Polybutylene succinate (PBS) composites filled with various mass fractions of silicon carbide (SiC) particles were fabricated via slow melt extrusion. The morphological analysis revealed that the fabrication technique assisted in achieving a good adhesion between the PBS and SiC, along with excellent filler dispersion throughout the PBS matrix. The inclusion of 40 wt.% SiC in the PBS composite afforded a 10 °C increase in the thermal degradation temperature and a 160% enhancement in the thermal conductivity relative to the neat PBS. The crystallization temperature also increased with the inclusion of SiC particles, thus making the composites easier to process. Furthermore, the improvement in the Young’s modulus of the PBS composites increased their rigidity and stiffness relative to the neat PBS.

UV Curable Organic-Inorganic Hybrid Materials

2000 ◽  
Vol 628 ◽  
Author(s):  
Guang-Way Jang ◽  
Ren-Jye Wu ◽  
Yuung-Ching Sheen ◽  
Ya-Hui Lin ◽  
Chi-Jung Chang
Keyword(s):  
Hybrid Materials ◽  
Colloidal Silica ◽  
Sol Gel ◽  
Solution Ph ◽  
Uv Curable ◽  
Inorganic Hybrid ◽  
Degradation Temperature ◽  
Sol Gel Process ◽  
The Stability ◽  
Thermal Degradation Temperature

This work successfully prepared an UV curable organic-inorganic hybrid material consisting of organic modified colloidal silica. Applications of UV curable organic-inorganic hybrid materials include abrasion resistant coatings, photo-patternable thin films and waveguides. Colloidal silica containing reactive functional groups were also prepared by reacting organic silane and tetraethyl orthosilicate (TEOS) using sol-gel process. In addition, the efficiency of grafting organic moiety onto silica nanoparticles was investigated by applying TGA and FTIR techniques. Experimental results indicated a strong interdependence between surface modification efficiency and solution pH. Acrylate-SiO2 hybrid formation could result in a shifting of thermal degradation temperature of organic component from about 200°C to near 400°C. In addition, the stability of organic modified colloidal silica in UV curable formula and the physical properties of resulting coatings were discussed. Furthermore, the morphology of organic modified colloidal silica was investigated by performing TEM and SEM studies‥

scholarly journals Morphological, thermal, and thermomechanical properties of cellulose nanocrystals reinforced polylactide/poly [(butylene succinate)-co-adipate] blend composite foams

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Mpho Phillip Motloung ◽  
Simphiwe Zungu ◽  
Vincent Ojijo ◽  
Jayita Bandyopadhyay ◽  
Suprakas Sinha Ray
Keyword(s):  
Morphological Analysis ◽  
Cell Structure ◽  
Environmentally Friendly ◽  
Processing Technique ◽  
Thermomechanical Properties ◽  
Environmental Concerns ◽  
Butylene Succinate ◽  
Peak Intensity ◽  
Composite Foams ◽  
Reinforcing Agent

Abstract This study examines the influence of cellulose nanocrystal (CN) particles on the morphological, thermal, and thermo-mechanical properties of polylactide (PLA)/poly [(butylene succinate)-co-adipate] (PBSA) blend foams prepared by casting and particulate leaching method using fructose as porogen particles. The morphological analysis showed an interconnected open-cell structure, with porosity above 80%. The crystallinity of the prepared foams was disrupted by the inclusion of CN particles as observed from XRD analyses, which showed a decrease in PLA crystal peak intensity. With regards to neat blend foam, the onset thermal degradation increased with the addition of CN particles, which also increased the thermal stability at 50% weight loss. Furthermore, CN acted as a reinforcing agent in improving the stiffness of the prepared blend foam. Overall, completely environmentally friendly foams were successfully prepared, as a potential material that can replace the current existing foam materials that pose many environmental concerns. However, there is a need to develop an environmentally friendly processing technique.

Effect of Clay on the Properties of Polyoxymethylene/Clay Nanocomposites

2012 ◽  
Vol 488-489 ◽  
pp. 82-86 ◽  
Author(s):  
Sirirat Wacharawichanant ◽  
Paramaporn Sahapaibounkit ◽  
Unchana Saeueng
Keyword(s):  
Filler Content ◽  
Clay Content ◽  
Morphological Properties ◽  
Clay Nanocomposites ◽  
Clay Surface ◽  
Degradation Temperature ◽  
Surface Modified ◽  
The Impact ◽  
Thermal Stability Of ◽  
Thermal Degradation Temperature

This work investigated the effect of montmorillonite clay surface modified with 25-30 wt% trimethyl stearyl ammonium (clay) on mechanical, thermal and morphological properties of polyoxymethylene (POM)/clay nanocomposites were investigated. The results showed that POM/clay nanocomposites could maintain or decrease their tensile strength for a certain clay loading range. The Young’s modulus of the nanocomposites increased by adding clay in a range of 0.5-4 wt% while the impact strength showed an increase in a range of 0.5-2 wt%. The percent strain at break of the nanocomposites decreased with increasing filler content. The thermal degradation temperature decreased with an increase of clay content thus the addition of clay did not improve the thermal stability of POM. The microstructure of neat POM and POM/clay nanocomposites was observed that the dispersion of clay was a good in POM matrix at low clay content. The nanocomposites formed the intercalated structure with clay, and the intercalated clay stacks were distributed uniformly in the nanocomposite. The increase of clay content observed increasing of brittleness in POM/clay nanocomposites.

Synthesis, Characterization and Properties of Polyesteramides Based on ε-Caprolactone and 6-Aminocaproic Acid

2011 ◽  
Vol 287-290 ◽  
pp. 1538-1547 ◽  
Author(s):  
Yi He ◽  
You Ru Du ◽  
Xiao Bo Liu
Keyword(s):  
Tensile Strength ◽  
Tensile Testing ◽  
Aminocaproic Acid ◽  
Amide Bond ◽  
Ester Bond ◽  
Degradation Temperature ◽  
Melt Polycondensation ◽  
Higher Temperature ◽  
Lower Temperature ◽  
Thermal Degradation Temperature

Biodegradable aliphatic polyesteramides were synthesized from ε-caprolactone and 6-aminocaproic acid by melt-polycondensation method. FTIR, 1H-NMR, DSC, WAXD, TG, and tensile testing were used to characterize the polyesteramides. With the increase in 6-aminocaproic acid content, the melting temperature, thermal degradation temperature and tensile strength at break increased accordingly. The ester bond decomposes at lower temperature, and then the amide bond decomposes at higher temperature.

scholarly journals Electrospun Ultrafine Cationic Cellulose Fibers Produced from Sugarcane Bagasse for Potential Textile Applications

Polymers ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 3927
Author(s):  
Andrés Felipe Ochica Larrota ◽  
Ricardo Vera-Graziano ◽  
Alex López-Córdoba ◽  
Edwin Yesid Gómez-Pachón
Keyword(s):  
Sugarcane Bagasse ◽  
Morphological Analysis ◽  
Morphological Characteristics ◽  
Cellulose Fibers ◽  
Industrial Applications ◽  
Raw Material ◽  
Vinyl Sulfone ◽  
Degradation Temperature ◽  
Functionalized Materials ◽  
Added Salt

Sugarcane bagasse (SCB) is an abundant by-product of sugar refining that can be utilized as a raw material for cellulose isolation for several industrial applications. Electrospinning has garnered attention in recent years because it allows the preparation of cellulosic materials with unique properties. In this study, cellulose was isolated from sugarcane bagasse and acetylated to fabricate fine acetate cellulose fibers through electrospinning. Subsequently, the electrospun fibers were deacetylated and cationized in order to produce functionalized materials with potential textile applications. The functional fibers were colored with an anionic dye (vinyl sulfone) with and without the presence of salt and were evaluated according to dye fixation, color attributes, morphological characteristics, and thermal stability. Cationic cellulose fibers that were dyed without added salt were found to be brighter and demonstrated better color fixation than those with added salt. In addition, morphological analysis performed using scanning electron microscopy demonstrated that cationized fibers dyed without added salt were better preserved at this stage. The cationic fiber also evidenced a high-temperature resistance, exhibiting a degradation temperature above 236 °C. The results suggest that cellulose fibers dyed in this manner can potentially be considered for use in textile applications due to their suitable dye fixation and tunable porosity (i.e., breathability).

scholarly journals Thermogravimetric analysis-based characterization of suitable biomass for alkaline peroxide treatment to obtain cellulose and fermentable sugars

BioResources ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. 6217-6229
Author(s):  
Akihiro Hideno
Keyword(s):  
Thermogravimetric Analysis ◽  
Thermal Degradation ◽  
Rice Straw ◽  
Lignin Content ◽  
Cellulose Microfibrils ◽  
Crystalline Cellulose ◽  
Japanese Cypress ◽  
Alkaline Peroxide ◽  
Degradation Temperature ◽  
Thermal Degradation Temperature

To characterize a suitable biomass for alkaline peroxide treatment, four types of lignocellulosic biomass (rice straw, two Miscanthus spp., and Japanese cypress) were characterized using thermogravimetric analysis. Before the alkaline peroxide treatment, rice straw had the lowest initial thermal degradation temperature and Japanese cypress had the highest. After alkaline peroxide treatment, this trend was reversed, such that the highest initial thermal degradation temperature was for alkaline-peroxide treated rice straw. Hemicellulose and lignin content significantly affected the thermal degradation behavior and alkaline peroxide treatment efficiency. Among the four lignocelluloses, raw rice straw exhibited the highest reducing capability, whereas the treated rice straw exhibited the lowest reducing capability. Surface morphology and crystallinity indicated that when the rice straw was subjected to AP treatment at room temperature for 10 min, crystalline cellulose microfibrils were exposed and concentrated on the surface. Thus, among the samples tested, rice straw was found to be the most suitable biomass for alkaline peroxide treatment.

Effect of Vulcanization Processes on Properties of Natural Rubber/Cellulose Composites

2021 ◽  
Vol 902 ◽  
pp. 95-100
Author(s):  
Yanika Poonpipat ◽  
Tanabadee Boonmalert ◽  
Paweena Prapainainar ◽  
Peerapan Dittanet
Keyword(s):  
Tensile Strength ◽  
Natural Rubber ◽  
Electron Beam Irradiation ◽  
Morphological Analysis ◽  
Morphological Properties ◽  
Rubber Composites ◽  
Degradation Temperature ◽  
Cellulose Composites ◽  
Natural Rubber Composites ◽  
Reinforcing Filler

The effect of vulcanization processes and surface treatment of cellulose were investigated on tensile strength, degradation temperature, and morphological properties of cellulose/natural rubber composites. Cellulose was surface-treated with Si-69 silane coupling agent and used as reinforcing filler in natural rubber (NR). Different vulcanization processes including electron beam irradiation (EB-Cured) and sulphur vulcanization (S-Cured) were used to crosslink NR. The incorporation of both untreated and treated cellulose at various concentrations (5, 10, 15 and 20 phr) into NR was found to significantly improve the tensile strength and modulus. Notably, with addition of treated cellulose in NR, the tensile strength and modulus were considerably higher than that of the untreated cellulose for all curing system. SEM morphological analysis revealed a well dispersion of cellulose particles in NR matrix. Addition of cellulose slightly decreased the onset of degradation temperature of NR, however, the degradable temperature was found to be unchanged. The curing systems had shown an impact on tensile property of NR. S-Cured NR exhibited highest modulus of 2.23 MPa comparing to the EB-Cured NR (1.69 MPa) for the same amount of cellulose (20 phr), due to a stronger crosslink network. However, the curing system had no significant impact on degradation temperature of NR.

A new high performance novolac-based polytriazole resin

2016 ◽  
Vol 30 (1) ◽  
pp. 109-115 ◽  
Author(s):  
Lvyuan Ye ◽  
Liqiang Wan ◽  
Farong Huang
Keyword(s):  
Mechanical Property ◽  
Differential Scanning Calorimetry ◽  
High Performance ◽  
Infrared Analysis ◽  
Good Mechanical Property ◽  
Novolac Resin ◽  
Scanning Calorimetry ◽  
Click Polymerization ◽  
Degradation Temperature ◽  
Thermal Degradation Temperature

A novolac-based polytriazole (NPTA) resin was synthesized using 4,4′-diazidomethylbiphenyl and a propargylated novolac resin through catalyst-free click polymerization. Differential scanning calorimetry and Fourier transform infrared analysis results demonstrate that the NPTA resin can be cured at 80°C. The glass transition temperature of the cured NPTA-88 resin is 202°C. The thermal degradation temperature of the cured NPTA resin is 352°C under nitrogen. The composite of the resin exhibits good mechanical property.

Properties of Coating Films Synthesized from Colloidal Silica and Methyltrimethoxysilane

2007 ◽  
Vol 544-545 ◽  
pp. 1037-1040
Author(s):  
Hoy Yul Park ◽  
Moon Kyong Na ◽  
Seog Young Yoon ◽  
Seong Soo Park
Keyword(s):  
Colloidal Silica ◽  
Sol Gel ◽  
Chemical Properties ◽  
Dip Coating ◽  
Coating Films ◽  
Glass Substrates ◽  
Degradation Temperature ◽  
Physical And Chemical ◽  
And Chemical Properties ◽  
Thermal Degradation Temperature

Colloidal silica/methyltrimethoxysilane (MTMS) sol solutions were prepared in variation with the ratio of MTMS to colloidal silica. Sol solutions were prepared by sol-gel reaction. To understand their physical and chemical properties, dip coating of sol solutions was performed on the glass substrates. The state of coating films was investigated in variation with the amount of MTMS and reaction time. The contact angle and thickness of coating films increased with an increasing amount of MTMS. The surface roughness of coating films decreased with an increasing amount of MTMS. Coating films were stable until 550°C. Thermal degradation temperature of coating films decreased with an increasing amount of MTMS.

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