Results 11 to 20 of about 2,592 (294)

Analysis of temperature effects near mode I cracks in glassy polymers [PDF]

open access: yes, 2005
A previous isothermal study has shown that the toughness of glassy polymers is governed by the competition between shear yielding and crazing. The present work aims at investigating loading rates for which thermal effects need to be accounted for.
Estevez, R.,   +14 more
core   +2 more sources

Industrial vegetable oil by-products increase the ductility of polylactide

open access: yeseXPRESS Polymer Letters, 2015
The use of industrial by-products of the vegetable oil industry as ductility increasing additives of polylactide (PLA) was investigated. Vegetable oil deodorization condensates were melt-blended by twin-screw extrusion up to a maximum inclusion quantity ...
A. Ruellan   +6 more
doaj   +1 more source

Mechanical behaviour of poly(lactic acid)/cellulose nanocrystal nanocomposites: A comparative study between conventional tensile test and small punch test

open access: yeseXPRESS Polymer Letters, 2020
The use of nanocomposites is increasingly frequent as a way to improve the mechanical behaviour of polymers. In the specific case of poly(lactic acid) (PLA), the use of cellulose nanocrystals (CNC) as a reinforcing material is an interesting option, once
S. Singh   +4 more
doaj   +1 more source

Different Rols of Modified Organoclay in Deformation Mechanism Control of Polymeric Matrices [PDF]

open access: yesعلوم و تکنولوژی پلیمر, 2014
The effect of organically modified clay on the structure and deformation mechanism of polymeric matrices was investigated. For this purpose, the role of organoclay in deformation control of polymeric matrices, with different deformation mechanisms, has ...
Babak Akbari, Reza Bagheri
doaj   +1 more source

Macroscopic criterion for craze initiation in polystyrene

open access: yesMechanical Engineering Journal, 2017
Macroscopic failure of polystyrene has been investigated under pure shear and simple tension by isochronal static tests in air at room temperature. A number of crazes were clearly observed under both stress states.
Makoto KAWAGOE, Hisashi FUJITA
doaj   +1 more source

Causes of evolution and influence on failure strength of thermal crazing

open access: yesNihon Kikai Gakkai ronbunshu, 2021
Craze cracking is a typical cracking morphology caused by thermal fatigue loading; however, the reason for its cause by thermal fatigue loading is not fully understood. It is known that craze cracks do not grow deeply.
Masayuki KAMAYA
doaj   +1 more source

Flexible Conductive Substrate Incorporating a Submicrometer Co-continuous Polyaniline Phase within Polyethylene by Controlled Crazing [PDF]

open access: yes, 2021
A polyethylene film with an incorporated nano-dispersed polyaniline conductive network was developed by controlled crazing in a high-pressure reactor while immersed in an emulsified medium of aniline in chloroform.
Shiping Zhu   +5 more
core   +1 more source

Ionic Liquid-Nanostructured Poly(Methyl Methacrylate)

open access: yesNanomaterials, 2019
Here, ionic liquids (ILs) based on imidazolium and ammonium cations were used as modifying agents for poly(methyl methacrylate) (PMMA) by extrusion. The effects of the chemical nature of the cation and/or counter anion on the resulting properties of IL ...
Clarice Fedosse Zornio   +3 more
doaj   +1 more source

Evaluation of Different Sterilization Methods on Try-In Preformed Stainless Steel Crowns and Their Consequences: An In Vivo Microbiological Study [PDF]

open access: yesJournal of South Asian Association of Pediatric Dentistry
Aim and background: Stainless steel crowns (SSC) in pediatric dentistry are prefabricated; they must be selected and tried, which subjects them to contamination with biological fluids. Therefore, these crowns must be sterilized before reuse.
Namratha Tharay   +5 more
doaj   +1 more source

GEOLOGICAL STUDY OF EL-ESH GRANITIC PLUTON TO ELUCIDATE THE SUITABILITY OF ITS PLACER FELDSPARS FOR CERAMIC INDUSTRY IN EGYPT [PDF]

open access: yesDelta Journal of Science, 2007
Two mica syenogranites of Gabal El Esh being emplaced into Dokhan volcanics. These leucogranites are peraluminous in composition, Fe-rich sub-alkaline with low contents of Ba and high contents of Rb and k2O.
ASHRAF F. MOHAREM, REMON R. AYOUB
doaj   +1 more source

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