scholarly journals Dimensional stability and tensile strength of irradiated Nicalon-CG and Hi-Nicalon SiC fibers

1997 ◽  
Author(s):  
G.E. Youngblood ◽  
C.H. Jr. Henager ◽  
D.J. Senor ◽  
G.A. Newsome ◽  
J.J. Woods
Keyword(s):  
Tensile Strength ◽  
Dimensional Stability ◽  
Sic Fibers

Study on Particleboard made from Nipa palm (Nypa fruticans) stem wood and Rajkoroi (Albizia richardiana) wood

2018 ◽  
Vol 25 (1) ◽  
pp. 15-18
Author(s):  
Md. Mahabubur Rahaman ◽  
◽  
Khurshid Akhter ◽  
S. Hossain ◽  
Md. Rakibul Islam ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Dimensional Stability ◽  
Bending Strength ◽  
Strength Properties ◽  
Wood Chips ◽  
Standard Specification ◽  
Stem Wood ◽  
Nypa Fruticans ◽  
Albizia Richardiana ◽  
Nipa Palm

The study was conducted to find out the suitability of making particleboard using nipa palm (Nypa fruticans) stem wood and rajkoroi (Albizia richardiana) wood chips. Particleboards were fabricated at six different ratios of nipa palm stem and rajkoroi wood chips such as 100:0, 75:25, 50:50, 25:75, 10:90 and 0:100. Characteristics of particleboards such as modulus of rupture, internal bond strength, water absorption, thickness swelling and moisture content were measured. Results shows that particleboards made from 100% rajkoroi wood chips have the highest static bending properties and highest tensile strength properties of other particleboards but 100% nipa palm stem wood chips have the lowest static bending and lowest tensile strength properties of other particleboards. 10% nipa palm stem wood chips particleboard have the highest bending strength and tensile strength is better than 100% nipa palm stem wood chips and other mixing chips of particleboards. Mechanical, water resistance and dimensional stability properties were tested according to Indian standard specification. Tensile strength passed the British and German standard specification and nearest to Bureau of Indian Standard, bending strength was found nearest to Indian Standard but lower than German and British Standard specification. Strength property of rajkoroi wood chips particleboard is higher than nipa palm steam wood chips particleboard but dimensional stability is lower than nipa palm steam wood chips particleboard.

Synthesis of Continuous Sic Fibers with High Tensile Strength

1976 ◽  
Vol 59 (7-8) ◽  
pp. 324-327 ◽  
Author(s):  
SEISHI YAJIMA ◽  
KIYOHITO OKAMURA ◽  
JOSABURO HAYASHI ◽  
MAMORU OMORI
Keyword(s):  
Tensile Strength ◽  
High Tensile Strength ◽  
Sic Fibers

scholarly journals DIMENSIONAL STABILITY AND TENSILE STRENGTH OF WOOD PLASTIC COMPOSITE FORMED WITH HIGHER PLASTIC CONTENT

2020 ◽  
Vol 4 (3) ◽  
pp. 609-614
Author(s):  
K. J. Lawal ◽  
A. Oluyege ◽  
T. S. Bola ◽  
K. S. Aina ◽  
B. C. Falemara ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Water Absorption ◽  
Wood Species ◽  
Dimensional Stability ◽  
Strength Properties ◽  
Thickness Swelling ◽  
Plastic Composite ◽  
Wood Particles ◽  
Mixing Proportion ◽  
Waste Particles

This study investigated the dimensional stability and strength properties of plastic bonded composites produced from wood waste particles and polyethylene using extruder. The composites were produced from wood species such as such as: Triplochiton scleroxylon, Terminalia superba and Gmelina arborea at a mixing proportion of 60:40 (plastic/wood) on a weight by weight basis. Evaluation of properties was carried out in accordance with the American Standard Testing Methods of 570 and 790 to determine the dimensional stability and strength properties of the composites. The results of findings revealed that water absorption and thickness swelling of the wood composites ranged from 10.08% to 15.36% and 4.33% to 5.58% respectively after 24hours and 48hours immersion in water. Tensile strength also ranged between 29.4MPa and 45.6MPa. Composite board made from T. superba wood particles had the lowest significant water absorption (10.08%), thickness swelling (4.33%) and highest significant tensile strength (45.6MPa) compared to composites produced from G. arborea and T. scleroxylon wood particles. It was observed that high density wood species exhibit lower water intake, lower thickness swelling and higher tensile strength, while the contrary is the case for lower density wood species. In conclusion, the three tree species used for the study could be recommended for the production of wood composite like particle board, fibre board, wood cement boards and others.

INVESTIGATION OF THE INFLUENCE OF THE THERMAL REGIME OF FDM PRINTING ON THE STRUCTURING AND WARPING OF POLYETHYLENE SAMPLES

2021 ◽  
pp. 48-58
Author(s):  
E.N. Kablov ◽  
◽  
S.V. Kondrashov ◽  
A.A. Melnikov ◽  
S.A. Pavlenko ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Polymer Matrix ◽  
Thermal Regime ◽  
Dimensional Stability ◽  
Crystallization Process ◽  
3D Printer ◽  
Oxidative Destruction ◽  
Increased Temperature ◽  
Thermal Oxidative Destruction ◽  
Microstructural Studies

The study of the influence of the temperature of polyethylene printing on the dimensional stability of samples obtained by the method of FDM printing has been carried out. It is shown that a change in the temperature of the nozzle from 200 to 260 °C leads to a decrease in the deviation from the plane by a factor of eight. In this case, the tensile strength remains practically unchanged, and the elongation increases by 30 %. It has been established by the methods of rheological and microstructural studies that the observed effect is associated with a change in the structure of polyethylene, which is initiated by an increased temperature of the printer's extruder head. It has been suggested that the likely reason for the change in the structure of polyethylene is a change in the course of the crystallization process due to partial thermal oxidative destruction of the polymer matrix in the extruder head of a 3D printer.

Physical Properties of Waste Lignin/HDPE Composites

2011 ◽  
Vol 221 ◽  
pp. 60-65 ◽  
Author(s):  
Tian Liu ◽  
Qing Wen Wang ◽  
Hui Zhao
Keyword(s):  
Tensile Strength ◽  
Flexural Strength ◽  
Physical Properties ◽  
Thermal Behavior ◽  
Dimensional Stability ◽  
High Density Polyethylene ◽  
Lignin Content ◽  
Main Concern ◽  
Dsc Analysis ◽  
Effective Utilization

The effective utilization of lignin waste has been a main concern in the bio-ethanol industry which uses straw and stalks as feedstock. In this study the lignin waste was incorporated into high density polyethylene (HDPE) to make composites by extruded pellet fabrication and thermoform process. With the increasing of the lignin content from 55% to 75%, the static flexural strength of the resulting blends was hardly influenced, but the tensile strength decreased 42%. The mechanical and dimensional stability tests both showed that the addition of 4% MAPE promoted the interfacial bonding between lignin and HDPE. The DSC analysis showed the presence of lignin scarcely influences the thermal behavior of pure HDPE and the composites.

scholarly journals High Thermal Stability, High Tensile Strength, and Good Water Barrier Property of Terpolyester Containing Biobased Monomer for Next-Generation Smart Film Application: Synthesis and Characterization

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2458 ◽  
Author(s):  
Jaemin Jeong ◽  
Fiaz Hussain ◽  
Sangwon Park ◽  
Soo-Jung Kang ◽  
Jinhwan Kim
Keyword(s):  
Tensile Strength ◽  
Dimensional Stability ◽  
Next Generation ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Performance Properties ◽  
Flexible Devices ◽  
Water Barrier ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

This research synthesizes novel copolyester (PCITN) containing biobased isosorbide, 1,4-cyclohexandimethanol, terephthalic acid, and 2,6-naphthalene dicarboxylic acid and characterize its properties. The PCITN copolyester was extruded into film, and its performance properties including: tensile strength, Young’s modulus, thermal, dimensional stability, barrier (water barrier), and optical (birefringence and transmittance) were analyzed after uniaxial stretching. The films have higher Tg, Tm, dimensional stability, and mechanical properties than other polyester-type polymers, and these performance properties are significantly increased with increasing stretching. This is due to the increased orientation of molecular chains inside the films, which was confirmed by differential scanning calorimetry (DSC), X-ray diffraction (XRD), and birefringence results. Good water barrier (0.54%) and lower birefringence (△n: 0.09) of PCITN film compared to poly(ethylene terephthalate) (PET), poly(ethylene 2,6-naphthalate) (PEN), and polyimide (PI) films, used as conventional substrate materials for optical devices, make it an ideal candidate as performance material for next-generation flexible devices.

Dimensional stability and tensile strength of irradiated Nicalon-CG and Hi-Nicalon fibers

1998 ◽  
Vol 253 (1-3) ◽  
pp. 60-66 ◽  
Author(s):  
C.H Henager ◽  
G.E Youngblood ◽  
D.J Senor ◽  
G.A Newsome ◽  
J.J Woods
Keyword(s):  
Tensile Strength ◽  
Dimensional Stability

Tensile strength and fracture surface characterization of Hi-Nicalon™ SiC fibers

2001 ◽  
Vol 289 (1-2) ◽  
pp. 1-9 ◽  
Author(s):  
G.E. Youngblood ◽  
Charles Lewinsohn ◽  
R.H. Jones ◽  
Akira Kohyama
Keyword(s):  
Tensile Strength ◽  
Fracture Surface ◽  
Surface Characterization ◽  
Sic Fibers

scholarly journals PET/Bio-Based Terpolyester Blends with High Dimensional Thermal Stability

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 728
Author(s):  
Sangyoon Park ◽  
Sarinthip Thanakkasaranee ◽  
Hojun Shin ◽  
Youngsoo Lee ◽  
Guman Tak ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Tensile Strength ◽  
Thermal Properties ◽  
Dimensional Stability ◽  
High Dimensional ◽  
Melt Blending ◽  
Poly Ethylene Glycol ◽  
Heat Distortion Temperature ◽  
Poly Ethylene ◽  
Thermal Stability Of

To improve the dimensional thermal stability of polyethylene terephthalate (PET), a poly(ethylene glycol 1,4-cyclohexane dimethylene (CHDM) isosorbide (ISB) terephthalate) (PEICT) known as ECOZEN®T110 (EZT) was introduced into PET using a melt blending technique. The miscibility, morphology, and thermal properties of the PET/EZT samples were investigated. The introduction of amorphous EZT into semi-crystalline PET increased the glass transition temperature (Tg) but decreased the crystallinity, which could be related to the transesterification reaction. By adding EZT contents up to 20%, the PET/EZT samples showed a single Tg, which indicated the miscibility between PET and EZT. However, two Tg values were observed in the PET/EZT samples with higher EZT contents (30–70%), indicating partial miscibility. This may have been due to the slightly different rheological and thermodynamic parameters that were affected by a higher ratio of bulky (rigid ISB and ductile CHDM) groups in EZT. However, the heat distortion temperature of the PET/EZT samples remarkably increased, which indicated that the dimensional stability was truly enhanced. Although the crystallinity of the PET/EZT samples decreased with increasing EZT content, the tensile strength and Young’s modulus decreased slightly. Based on these results, the as-prepared PET/EZT samples with high dimensional stability can be used as a high-temperature polymeric material in various applications.

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