Mechanical Properties and Characterization of the Crystalline Structure in Annealed Thermotropic Poly(azomethines)

1996 ◽  
Vol 29 (7) ◽  
pp. 2515-2523 ◽  
Author(s):  
P. Cerrada ◽  
L. Oriol ◽  
M. Piñol ◽  
J. L. Serrano ◽  
I. Iribarren ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Crystalline Structure ◽  
Properties And Characterization

scholarly journals Properties and Characterization of a PLA–Chitin–Starch Biodegradable Polymer Composite

Polymers ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1656 ◽  
Author(s):  
Olaiya ◽  
Surya ◽  
Oke ◽  
Rizal ◽  
Sadiku ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Degradation Process ◽  
Mechanical Analysis ◽  
Poly Lactic Acid ◽  
Dynamic Mechanical ◽  
Properties And Characterization ◽  
Percentage Weight ◽  
Specific Order ◽  
Starch Blends

This paper presents a comparison on the effects of blending chitin and/or starch with poly(lactic acid) (PLA). Three sets of composites (PLA–chitin, PLA–starch and PLA–chitin–starch) with 92%, 94%, 96% and 98% PLA by weight were prepared. The percentage weight (wt.%) amount of the chitin and starch incorporated ranges from 2% to 8%. The mechanical, dynamic mechanical, thermal and microstructural properties were analyzed. The results from the tensile strength, yield strength, Young's modulus, and impact showed that the PLA–chitin–starch blend has the best mechanical properties compared to PLA–chitin and PLA–starch blends. The dynamic mechanical analysis result shows a better damping property for PLA–chitin than PLA–chitin–starch and PLA–starch. On the other hand, the thermal property analysis from thermogravimetry analysis (TGA) shows no significant improvement in a specific order, but the glass transition temperature of the composite increased compared to that of neat PLA. However, the degradation process was found to start with PLA–chitin for all composites, which suggests an improvement in PLA degradation. Significantly, the morphological analysis revealed a uniform mix with an obvious blend network in the three composites. Interestingly, the network was more significant in the PLA–chitin–starch blend, which may be responsible for its significantly enhanced mechanical properties compared with PLA–chitin and PLA–starch samples.

scholarly journals Mechanical properties and characterization of ZrO2-Al2O3 composites with high fracture strength.

1991 ◽  
Vol 38 (3) ◽  
pp. 369-373 ◽  
Author(s):  
Ryoichi Shikata ◽  
Yoshinori Urata ◽  
Takeshi Shiono ◽  
Tomozo Nishikawa
Keyword(s):  
Mechanical Properties ◽  
Fracture Strength ◽  
High Fracture ◽  
Properties And Characterization

scholarly journals Characterization of adobe bricks used in developing countries: Mexico as a case of study

2021 ◽  
pp. 1-12
Author(s):  
José Marcelino Gutiérrez-Villalobos ◽  
Jatziri Yunuén Moreno-Martínez ◽  
Policarpo Catalán-Quiroz ◽  
Arturo Galván-Chávez
Keyword(s):  
Mechanical Properties ◽  
Rural Areas ◽  
Building Material ◽  
Nondestructive Tests ◽  
Properties And Characterization ◽  
Earth Blocks ◽  
Adobe Masonry ◽  
New Sensors ◽  
High Degree

In Mexico adobe masonry is a traditional building material common in rural areas with low economic development and a high degree of marginalization. In addition, a growing interest in adobe masonry is noticed in two ways: for rescuing the heritage and as a rediscovered environmentally friendly building material. The problems are found of how to carry out the conservation works of the great built heritage with this material, as well as the lack of skilled people at all levels, from designer to masons, because it is a forgotten technique. Hence, some recent investigations about the obtention of adobe mechanical properties and characterization of adobe bricks, including earth blocks, have been performed. This article investigates experimentally destructive and nondestructive tests used for this purpose, especially elastic mechanical properties, considering new sensors, systems and different techniques has led to the inspection of adobe bricks. The results show, compared destructive with nondestructive methods, a good correlation between both techniques. This study contributes towards a better understanding of the elastic mechanical properties of adobe bricks built in Mexico, considered as a developing country.

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