Properties of a Photoimageable Thin Polyimide Film

1990 ◽  
Vol 203 ◽  
Author(s):  
Taishih Maw ◽  
Richard E. Hopla
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Tensile Strength ◽  
Tensile Modulus ◽  
Polyimide Film ◽  
Decomposition Temperature ◽  
Irganox 1010 ◽  
Elongation At Break ◽  
Purge Gas ◽  
Exposure Energy

ABSTRACTMechanical properties (tensile modulus, tensile strength, elongation at break), thermal properties (T8' CTE, thermo-decomposition temperature, and rate of weight loss) and electrical properties of Problmlde 414 cured films have been determined. The mechanical properties of Probimide 414 thin films are highly dependent on the hard-bake temperature, hard-bake time, and purge gas, but not dependent on the level of the exposure energy or the presence of 1% Irganox 1010 (w/w) as a stabilizer. At a hard-bake temperature of 350ºC and a nitrogen purge rate of 15 SCFH, Probimide 414 films showed excellent retention of the mechanical properties during extended heat treatment.

Electrostatic Spinning Preparation and Mechanical Properties of PLGA Fibers and Fiber Membrane

2013 ◽  
Vol 834-836 ◽  
pp. 847-854
Author(s):  
Le Lun Jiang ◽  
Yong Huang ◽  
Jin Tian Ling ◽  
Zhang Qi Feng ◽  
Xi Feng Qiao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Glycolic Acid ◽  
Tensile Modulus ◽  
Fiber Membrane ◽  
Elongation At Break ◽  
Electrostatic Spinning ◽  
Fiber Membranes ◽  
Loading System ◽  
Main Factor

PLGA (polylactic-co-glycolic acid) is an ideal material for biodegradable medical suture. PLGA fibers and fiber membrane was prepared by using electrostatic spinning, the surface morphology of PLGA fibers and fiber membranes was observed by SEM, and mechanical properties of PLGA fibers and fiber membranes were tested by self-developed micro-force loading system. Experimental results were found that the arrangement of PLGA fibers due to surface tension and friction between fibers was the main factor on mechanical properties of PLGA fibers. The tensile strength of two fibers in winding arrangement was 1.81 times of fibers arranged in parallel at a given number. The tensile strength of three fibers in winding arrangement was 1.25 times of fibers arranged in parallel at a given number. For 80.6 % porosity and 1.028-5.764 mm width PLGA fiber membranes, tensile strength was 1.06-1.47 MPa, tensile modulus was 9.14-13.6 MPa, and elongation at break was 10.8 % to 11.6 %. The tension of fiber membranes increased with its width.

Effect of Sintering Parameters and Flow Agent on the Mechanical Properties of High Speed Sintered Elastomer

2014 ◽  
Vol 136 (6) ◽  
Author(s):  
Farhana Norazman ◽  
Neil Hopkinson
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Fumed Silica ◽  
High Speed ◽  
Tensile Modulus ◽  
Thermoplastic Elastomer ◽  
Elongation At Break ◽  
Bed Temperature ◽  
Laser Systems ◽  
Powder Particles

High speed sintering (HSS) is an additive manufacturing (AM) process that creates parts by sintering powder particles using inkjet and infrared (IR) lamp technology rather than laser systems employed in laser sintering (LS). This research investigated the effects of machine parameters (lamp speed, bed temperature) and the addition of fumed silica flow agent on the tensile properties of thermoplastic elastomer (TPE) parts processed using HSS. The results showed improved elongation at break (EaB) values by a factor of more than 2× compared to reported values for LS of the same TPE. At constant parameters, improved tensile strength and tensile modulus were observed with the addition of flow agent into the sintering mixture.

Effect of Aging on Mechanical Properties of Natural Rubber Latex Products Filled with Alkanolamide-Modified Cassava Peel Waste Powder (CPWP)

2015 ◽  
Vol 1123 ◽  
pp. 387-390 ◽  
Author(s):  
Hamidah Harahap ◽  
Adrian Hartanto ◽  
Kelvin Hadinatan ◽  
Indra Surya ◽  
Baharin Azahari
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Natural Rubber ◽  
Natural Rubber Latex ◽  
Tensile Modulus ◽  
Rubber Latex ◽  
Elongation At Break ◽  
Hot Air ◽  
Before And After ◽  
Cassava Peel

The effect of aging on mechanical properties of natural rubber latex (NRL) products filled with alkanolamide-modified cassava peel waste powder (CPWP) was studied. CPWP used as fillers was prepared by milling and sieving it until the size of 100 mesh. The powder then was dispersed in a suspension containing water and alkanolamide in order to modify the prepared powders. The dispersion system of 10 pphr (part per hundred rubber) then was added into NRL matrix followed by pre-vulcanization at 70°C for 10 minutes. The NRL compound then were casted into films by coagulant dipping method then dried at 120°C for 10 minutes. Afterwards, the films were allowed to cool at room temperature for 24 hours before being aged in a circulation of hot air for 24 hours at 70°C. The properties such as tensile strength, tensile modulus, and elongation at break were evaluated between the aged samples and the unaged samples. From this study, it showed that the aged films have increasing value of tensile strength and tensile modulus while the value of elongation at break decreases. These datas are supported by Scanning Electron Microscope (SEM) micrographs which indicate that the change of morphology in NRL films occurs before and after aging.

Cellular Bi2O3/natural rubber composites for light-weight and lead-free gamma-shielding materials and their properties under gamma irradiation

2021 ◽  
pp. 0021955X2199735
Author(s):  
Phakamat Limarun ◽  
Teerasak Markpin ◽  
Narongrit Sombatsompop ◽  
Ekachai Wimolmala ◽  
Kiadtisak Saenboonruang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Natural Rubber ◽  
Gamma Irradiation ◽  
Attenuation Coefficient ◽  
Tensile Modulus ◽  
Lead Free ◽  
Morphological Properties ◽  
Light Weight ◽  
Elongation At Break

This work investigated the effects of a radiation-protective filler, namely bismuth oxide (Bi2O3), and blowing agents, namely azodicarbonamide (ADC) and oxy-bis (benzene sulfonyl) hydrazide (OBSH), on gamma attenuation and the mechanical, physical, and morphological properties of cellular natural rubber (NR) composites for potential use as light-weight and lead-free gamma-shielding materials. The contents of Bi2O3 were varied from 100 to 300 and 500 parts per hundred of rubber by weight (phr) and the contents of ADC or OBSH were varied from 0 to 8 and 16 phr. The results indicated that the addition of Bi2O3 enhanced the overall gamma-shielding ability, density, tensile modulus, and hardness (Shore OO), but lowered the tensile strength and elongation at break. On the other hand, the addition of ADC or OBSH resulted in decreases in the density, linear attenuation coefficient ( μ), and overall tensile properties but an increase in the mass attenuation coefficient ( μm), with ADC producing better mechanical properties than samples with OBSH. In addition, investigations on the properties of the cellular Bi2O3/NR composites under additional 35 kGy and 70 kGy gamma irradiation revealed that the irradiated samples had increased density, tensile modulus, and hardness (Shore OO), but decreased tensile strength, elongation at break, and μm after such ageing. In conclusion, the overall results suggested that the developed cellular Bi2O3/NR composites not only had efficient and promising gamma-shielding and mechanical properties but also offered comfort and light-weight to users, which could potentially reduce discomforts caused by wearing heavier conventional radiation-protective equipment.

Compatibilizing Modification of Polyethersulfone/Polycarbonate Blend

2013 ◽  
Vol 750-752 ◽  
pp. 858-862
Author(s):  
Cheng You Ma ◽  
Yan Mei Ma ◽  
Zhi He ◽  
Chen Yan ◽  
Dong Jiang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Thermal Properties ◽  
Block Copolymers ◽  
Interfacial Adhesion ◽  
Tensile Modulus ◽  
Ternary Blend ◽  
Dispersed Phase ◽  
Elongation At Break

Double block copolymers of polyethersulfone (PES)/polycarbonate (PC) were used as a compatibilizer for a blend of PES/PC. The morphology, thermal properties, mechanical properties, etc. of the resulting ternary blend systems were investigated. The addition of the compatibizer improved the compatibility between PES and PC. It was found that the interfacial adhesion was enhanced; the size of the dispersed phase was reduced. This resulted in an improvement of elongation at break and tenacity of PES/PC blends, while the tensile modulus slightly increased, and tensile strength was almost constant.

In Situ Synthesis and Mechanical Properties of Polylactic Acid/Hydroxyapatite Functionalized Graphene Nanocomposite

2017 ◽  
Vol 735 ◽  
pp. 230-234
Author(s):  
Aekkapan Sriboonrung ◽  
Siree Tangbunsuk ◽  
Chomdao Sinthuvanich ◽  
Wirunya Keawwattana
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Polylactic Acid ◽  
Tensile Modulus ◽  
Precipitation Method ◽  
Functionalized Graphene ◽  
X Ray Diffraction ◽  
Elongation At Break ◽  
Graphene Nanocomposite

The hydroxyapatite functionalized graphene (HAp-GnP) was prepared by precipitation method. It was characterized by Fourier Transform Infrared Spectroscopy (FTIR), X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM). Polylactic acid (PLA)/HAp-GnP and PLA/HAp-GnP composites were prepared in film by solution casting. The amount of HAp-GnP and HAp/GnP filled in PLA was fixed at 5% (by weight). The influence of HAp-GnP in the mechanical properties including tensile strength (TS), tensile modulus (E) and elongation at break (EB) of composites was investigated. It was found that tensile strength (TS) and tensile modulus (E) of the PLA/HAp-GnP composite were higher than those of PLA/HAp/GnP composite as a result of HAp making the interfacing with graphene leading to the greater distribution of HAp-GnP in PLA matrix. The PLA/HAp-GnP composite is applicable to be applied as bone substitute in the future.

Mechanical Properties of Bamboo Charcoal (BC)/Poly(Lactic) Acid (PLA) Composites

2019 ◽  
Vol 801 ◽  
pp. 121-126
Author(s):  
Rapeeporn Srisuk ◽  
Laongdaw Techawinyutham ◽  
Wantana Koetniyom ◽  
Rapeephun Dangtungee
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Lactic Acid ◽  
Shear Viscosity ◽  
Tensile Modulus ◽  
Poly Lactic Acid ◽  
Bamboo Charcoal ◽  
Elongation At Break ◽  
The Matrix

The influence of bamboo charcoal (BC) in Poly (lactic) acid (PLA) matrix as masterbatch was studied on mechanical 40:60, 50:50 and 60:40 of masterbatch. BC MBs were diluted at 1 phr, 3 phr, and 5 phr. BC showed even distribution in PLA matrix; however,, it decreased compatibility in the matrix. The infusion of BC in PLA matrix enhanced the tensile modulus; however, there was a reduction in the tensile strength and the elongation at break. It could also be ascertained that there is no signification difference in the hardness of BC/PLA composites compared with neat PLA. The addition of BC slightly decreased shear viscosity of the composites. The optimal BC content in the composites was found to be 2.82wt.% (5 phr 60:40).

The Effects of Kenaf Loadings and 3-aminopropyltriethoxysilane (APTES) Coupling Agent on Mechanical Properties of Polypropylene/Waste Tire Dust/Kenaf (Pp/WTD/KNF) Composites

2012 ◽  
Vol 626 ◽  
pp. 828-833 ◽  
Author(s):  
Ai Ling Pang ◽  
Hanafi Ismail
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Coupling Agent ◽  
Morphological Study ◽  
Interfacial Adhesion ◽  
Tensile Modulus ◽  
Elongation At Break ◽  
Waste Tire ◽  
Lower Elongation ◽  
Internal Mixer

The mechanical properties of polypropylene (PP)/waste tire dust (WTD)/kenaf (KNF) composites with and without 3-aminopropyltriethoxysilane (APTES) coupling agent were investigated. The composites were prepared using a Thermo Haake Polydrive internal mixer, where different KNF loading (0, 5, 10, 15, 20 phr) were used. The results revealed that the tensile modulus increased with increasing KNF loading but tensile strength and elongation at break were found decreased. Composites with APTES give higher tensile strength and modulus but lower elongation at break than composites without APTES. The presence of APTES enhanced the interfacial adhesion between PP/WTD matrices and KNF which result in higher tensile strength and modulus of the composites. These findings were supported by the morphological study of the tensile fractured surfaces of the composites.

The Effect of Binder on Mechanical Properties of Kenaf Fibre/Polypropylene Composites Using Full Factorial Method

2014 ◽  
Vol 695 ◽  
pp. 709-712 ◽  
Author(s):  
Mohd Amran ◽  
Raja Izamshah ◽  
Mohd Hadzley ◽  
Mohd Shahir ◽  
Mohd Amri ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Tensile Test ◽  
Weight Ratio ◽  
Tensile Modulus ◽  
Elongation At Break ◽  
Factorial Method ◽  
Kenaf Fibre ◽  
Pp Composites ◽  
Fibre Loading

The effect of maleated polypropylene (MAPP) as binder on the mechanical properties of kenaf fibre/polypropylene (KF/PP) composites is studied. Ratios between kenaf fibre and PP having 10:90, 30:70 and 50:50 in weight ratio were selected. Further, MAPP having 1, 3 and 5 percent in percentage of weight ratio was mixed in KF/PP composites. Hot press machine was used to produce tensile test samples of KF/PP composites. The mechanical properties that are tensile strength, tensile modulus and elongation at break of KF-PP composites were obtained from tensile test result. It is found that the tensile strength and tensile modulus increase with increasing the kenaf fibre loading and higher percentage of MAPP. Further, the elongation at break for KF/PP composites shows lower result when increasing of kenaf fibre loading. However, when percentage of MAPP added in KF/PP composites increases, the elongation at break increased slightly. Thus, result shows that kenaf fibre/PP composites with binder were better in tensile strength, tensile modulus however the elongation at break shows weak result unless the binder was added.

Tensile Mechanical Properties of Wood Fiber / PVC Composites

2011 ◽  
Vol 328-330 ◽  
pp. 1512-1516 ◽  
Author(s):  
Jie Li Duan ◽  
En Chen Jiang ◽  
Yu Hua Lu
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Tensile Strength ◽  
Tensile Properties ◽  
Rice Husk ◽  
Wood Fiber ◽  
Tensile Modulus ◽  
Elongation At Break

The influencing effects of the content of wood fiber, particle size and content of titanate coupler on the tensile properties of wood fiber (include the pine powder and the rice husk powder )/PVC composites (WPC) were investigated. The results showed that the tensile modulus of WPC are increased, the tensile strength and the elongation at break of WPC are decreased slightly when the wood fiber changed from 30 to 60( phr method) . Between 150μm and 165μm in the size of the diameter, the tensile strength of WPC increased by 11.5%, however it is increased by 5% between 165μm and 315μm. The content of titanate coupler affected significantly, the tensile properties of WPC appeared first increased and then decreased when the content of titanate coupler is increased from 0 to 3.5 shares( phr method). Added the same content of pine powder or rice husk powder, the tensile modulus and the tensile strength of WPC which filled pine powder are bigger, but the elongation at break of WPC which filled rice husk powder are bigger.

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