Physical–mechanical properties and morphology of filled low‐density polypropylene: Comparative study on calcium carbonate with oil shale and coal ashes

2021 ◽  
Author(s):  
Illia Krasnou ◽  
Faisal Nadeem ◽  
Andre Gregor ◽  
Can Rüstü Yörük ◽  
Andres Krumme
Keyword(s):  
Mechanical Properties ◽  
Calcium Carbonate ◽  
Comparative Study ◽  
Oil Shale ◽  
Low Density ◽  
Coal Ashes

scholarly journals Statistical Study on Additives Used to Improve Mechanical Properties of Polypropylene

Polymers ◽  
2022 ◽  
Vol 14 (1) ◽  
pp. 179
Author(s):  
N. S. Yousef
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Calcium Carbonate ◽  
Crystalline Polymer ◽  
Low Density Polyethylene ◽  
Low Density ◽  
A Value ◽  
Carbonate Filler ◽  
Industry Needs ◽  
Master Batch

Polypropylene (PP) is a semi-crystalline polymer that is brittle under severe conditions. To meet industry needs, and to increase the applications of polypropylene, its mechanical properties should be improved. In this research, the mechanical properties of polypropylene, such as tensile strength at break, tensile strength at yield, % elongation, and Young’s modulus, were improved using two types of additives. Additives used were calcium carbonate master batch filler composed of 80% calcium carbonate and 20% polyethylene, and a mixture of linear low-density polyethylene (LLDPE)/low density polyethylene (LDPE). Results showed that both tensile strength at break, and tensile strength at yield, decrease with increasing the amount of both additives. Percentage elongation of PP increased using both additives. The modulus of elasticity of PP increases by increasing the amount of both additives, until a value of 20 wt%. Analysis of variance (ANOVA test) or (F-test) shows significant differences between the effect of different weights of LLDPE/LDPE mixture and calcium carbonate filler on the four mechanical properties of polypropylene studied at a level of 0.05. T-tests are applied to compare between the effect of both calcium carbonate master batch filler and the mixture LLDPE/LDPE on the four mechanical properties of polypropylene studied. T-tests show no significant differences between the effect of both calcium carbonate master batch filler and the mixture LLDPE/LDPE on all mechanical properties of polypropylene studied at a level of 0.05.

Oxidative Degradation of Polyethylene Filled with Nanosized Crushed Shells of Sea Oysters

2021 ◽  
Vol 887 ◽  
pp. 123-128
Author(s):  
Z. Akhmetshina ◽  
E. Mastalygina ◽  
P. Pantyukhov
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Calcium Carbonate ◽  
Absorption Band ◽  
Climatic Factors ◽  
Oxidative Degradation ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Ftir Analysis ◽  
The Cost

The work is devoted to the study of the effect of marine calcium carbonate on the polymer matrix. The composite flat strips based on low-density polyethylene filled by crushed shells of sea oysters, which are the main source of sea calcium, were investigated. Marine calcium carbonate masterbatch was used to reduce the cost and stiffen the resulting composite materials. The effect of the masterbatch concentration on mechanical properties and oxidative degradation were studied. The materials were exposed to three climatic factors (temperature, UV-radiation and moisture). The addition of crushed shells led to embrittlement of the test materials. According to FTIR analysis, the absorption band at 1432 cm-1 attributed to carbonate minerals decreased or completely disappeared after weathering test due to washing out of CaCO3 from the composite.

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