Analysis and testing of polymer matrix composites with thermoplastic liners having enhanced chemical resistance

2017 ◽  
Vol 36 (20) ◽  
pp. 1487-1502
Author(s):  
Luke P Djukic ◽  
Manudha T Herath ◽  
Daniel C Rodgers ◽  
Roderick Sweeting ◽  
Honesto Buendia
Keyword(s):  
Polymer Matrix ◽  
Chemical Resistance ◽  
Polymer Matrix Composites ◽  
Polyethylene Liner ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Matrix Composites ◽  
Linear Low Density Polyethylene ◽  
Dangerous Goods ◽  
Steel Tanks

Polymer matrix composite tanks offer major advantages to the transport industry in terms of increased payload and corrosion resistance compared to conventional steel tanks. Chemical resistance and versatility can be enhanced through the addition of a thermoplastic liner. This paper presents the results of chemical conditioning, testing and analysis of a linear low-density polyethylene liner, on its own and supported by carbon fiber reinforced polymer. Results are compared to ADR (European Agreement Concerning the International Carriage of Dangerous Goods by Road) requirements. The linear low-density polyethylene liner was tested in combination with 12–15% sodium hypochlorite and 98% sulphuric acid. The results indicate that the liner is suitable for service in tanks transporting these two chemicals. Liners were conditioned at 50℃ for periods of 1000 or 2000 h. Shore D hardness tests and three-point bend tests were performed, compared to unconditioned benchmarks, and found to pass ADR requirements. Finite element models were validated and used to facilitate understanding of the failure of the laminates. Predictions indicate that failure load increases with increased liner modulus, yield stress, and thickness. The models also indicate that the laminate strength and modulus is not significantly changed during chemical conditioning for the stated chemicals.

scholarly journals A Study of the Effect of TiO2, CaCO3 and Al2O3 on Mechanical Properties of LDPE Polymer Composites Fabricated by Injection Moulding Technique

2018 ◽  
Vol 15 (2) ◽  
pp. 159-164
Author(s):  
K R Dinesh ◽  
Gururaj Hatti
Keyword(s):  
Mechanical Properties ◽  
Polymer Composites ◽  
Polymer Matrix ◽  
Injection Moulding ◽  
Polymer Matrix Composites ◽  
Low Density Polyethylene ◽  
Original Form ◽  
Matrix Composites ◽  
Moulding Machine ◽  
Low Wear

Due to their cost effectiveness, greater strength and ease of fabrication, polymer composites are noticeable candidate almost in all areas. However, when they are used in their original form they possess very low wear resistance and hardness. The present investigation gives information on mechanical properties of polymer matrix composites where LDPE (Low density polyethylene) is used as polymer matrix and TiO2, Al2O3 and CaCO3 are used as reinforcements. The samples were prepared according to ASTM standards by injection moulding machine with varying percentage of reinforcements in polymer matrix. Tests viz., tensile, flexural impact are carried out.

scholarly journals Preparation of Low-Density Polyethylene Composite with Copper Nanoparticles

2021 ◽  
Vol 16 ◽  
pp. 150-157
Author(s):  
A. B. Kostrichenko ◽  
Kyaw Ye Ko
Keyword(s):  
Crystal Structure ◽  
Phase Transformations ◽  
Polymer Matrix ◽  
Copper Nanoparticles ◽  
Degree Of Crystallinity ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Cu Nanoparticles ◽  
Linear Low Density Polyethylene ◽  
Polyethylene Composite

In this work, devoted to the preparation and study of the properties of copper-containing nanocomposites based on linear low density polyethylene, it is shown that the composition of the resulting nanocomposite is not complicated by phase transformations during its synthesis. Varying the concentration of copper (II) formate (1.2÷50.8 wt%) makes it possible to control the size of the formed nanoparticles (10.2±2.0÷ 21.3±1,5 nm). It has been shown that the presence of Cu nanoparticles in a polymer matrix leads to a decrease in its degree of crystallinity - the value decreases from 42% for polyethylene to 37% for 3Cu / LLDPE, which is due to the restriction of the free movement of polymer chain segments by metal nanoparticles and, accordingly, the formation of a less ordered crystal structure.

RHEOLOGICAL CHARACTERISTICS OF NANOCOMPOSITES BASED ON CLINOPTILOLITE AND LINEAR POLYETHYLENE OF LOW DENSITY

2018 ◽  
Vol 61 (7) ◽  
pp. 106
Author(s):  
Najaf T. Kakhramanov ◽  
Neli S. Koseva ◽  
Rena V. Kurbanova ◽  
Ilaha V. Bayramova ◽  
Nushaba B. Arzumanova ◽  
...  
Keyword(s):  
Shear Rate ◽  
Polymer Matrix ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Rheological Characteristics ◽  
Linear Low Density Polyethylene ◽  
Flow Curves ◽  
Linear Polyethylene ◽  
Natural Minerals ◽  
First Time

In the paper the results of the study of the influence of clinoptilolite concentration, shear stress and temperature on the effective viscosity, shear rate and activation energy of the viscous flow of nanocomposites based on linear low-density polyethylene were presented. It was shown that the in the composition of the natural mineral contains kaolinite or nanoclay. During the diffusion of macro chains into the interlayer space of nanoclays, the latter decays and the surfactant, exchanged cations or anions, stearates present there, as a result migrate into the polymer matrix and then, as lubricants, improve the flowability of the melt of the nanocomposite. For the first time it was shown that natural minerals of Azerbaijan belong to the number of bifunctional fillers, which contribute to the enhancement of polymer composites and, at the same time, improve the flowability of their melt. Rheological studies were carried out on the MELT FLOW TESTER, CEAST MF50 (INSTRON, Italy) capillary rheometer in the temperature range of 190-250 °C and the load of 2.16 -21.6 kg. The size of the nanoparticles of the composites was determined using the device model of STA PT1600 Linseiz, Germany, which varied from 14 to 110 nm. The nanoparticles of clinoptilolite were obtained in the analytical mill A-11 at the maximum rotor speed of 28,000 rpm. Flow curves of nanocomposites based on linear low density polyethylene and clinoptilolite were determined. It was established that introduction of 5% wt. clinoptilolite promotes an increase in shear rate 2.62 times. The results of the study of the influence of clinoptilolite concentration on the rheological and physico-mechanical characteristics of nanocomposites were presented. It was shown that when the concentration of clinoptilolite in the polymer matrix increases from 5 to 15 wt% the shear rate is somewhat reduced, but remains higher than that of the initial polyolefin.For citation:Kakhramanov N.T., Koseva N.S., Kurbanova R.V., Bayramova I.V., Arzumanova N.B., Ismailzade A.C. Rheological characteristics of nanocomposites based on clinoptilolite and linear polyethylene of low density. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 7. P. 105-112 

Polymer matrix composites and technology

2011 ◽  
Author(s):  
Ru-Min Wang ◽  
Shui-Rong Zheng ◽  
Ya-Ping Zheng
Keyword(s):  
Polymer Matrix ◽  
Polymer Matrix Composites ◽  
Matrix Composites

scholarly journals Low-Density Polyethylene Films Carrying ferula asafoetida Extract for Active Food Packaging: Thermal, Mechanical, Optical, Barrier, and Antifungal Properties

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Razieh Niazmand ◽  
Bibi Marzieh Razavizadeh ◽  
Farzaneh Sabbagh
Keyword(s):  
Polymer Matrix ◽  
Food Packaging ◽  
Barrier Properties ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Optical Barrier ◽  
Leaf Extracts ◽  
Polyethylene Films ◽  
Active Food Packaging ◽  
Ferula Asafoetida

The physical, thermal, mechanical, optical, microstructural, and barrier properties of low-density polyethylene films (LDPE) containing ferula asafoetida leaf and gum extracts were investigated. Results showed a reduction in elasticity and tensile strength with increasing extract concentration in the polymer matrix. The melting temperature and enthalpy increased with increasing concentration of extracts. The films containing extracts had lower L∗ and a∗ and higher b∗ indices. The films containing leaf extract had more barrier potential to UV than the gum extracts. The oxygen permeability in films containing 5% of leaf and gum extracts increased by 2.3 and 2.1 times, respectively. The morphology of the active films was similar to bubble swollen islands, which was more pronounced at higher concentrations of gum and leaf extracts. FTIR results confirmed some chemical interactions of ferula extracts with the polymer matrix. At the end of day 14th, the growth rate of Aspergillus niger and Saccharomyces cerevisea in the presence of the PE-Gum-5 reduced more than PE-Leaf-5 (3.7 and 2.4 logarithmic cycles, respectively) compared to the first day. Our findings showed that active LDPE films have desire thermo-mechanical and barrier properties for food packaging.

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