High fire-safety phosphorus-containing polyethylene terephthalate with well-balanced comprehensive performances by reactive blending with liquid crystalline copolyester

2021 ◽  
pp. 095400832110288
Author(s):  
Xue-Wu Yin ◽  
Juan Xue ◽  
Xiu-Li Wang ◽  
Yu-Zhong Wang
Keyword(s):  
Mechanical Properties ◽  
Heat Release ◽  
Polyethylene Terephthalate ◽  
Fire Safety ◽  
Liquid Crystalline ◽  
Public Awareness ◽  
Phosphinic Acid ◽  
High Strength ◽  
Reactive Blending ◽  
Synthetic Fibers

With increased public awareness of fire-safety, flame retardant materials have been widely used and developed. Among them, a polyester called CPET, synthesized by the copolymerization of polyethylene terephthalate and 2-carboxyethyl (phenyl) phosphinic acid, has a good fire-safety and has been employed in the manufacture of synthetic fibers. However, the fabricated fiber made of CPET simultaneously possessing good flame retardancy and mechanical properties is a dilemma. Herein, we resolve this problem through the reactive blending of CPET with a type of thermotropic liquid crystal copolyester (PPDT) and subsequently solid-state polymerization (SSP). Thus, the fire-safety of the CPET/PPDTSSP blend improves greatly. The peak heat release rate, total heat release, and total smoke release decrease by 31.2%, 16.3%, and 11.0%, respectively, compared with those of CPET. Meanwhile, the CPET/PPDTSSP shows better crystallization and mechanical properties than CPET. The strength at yield and Young’s modulus of CPET/PPDTSSP increase by 20.0% and 15.8%, respectively. This blend shows great potential in the fabrication of fire-safety fibers with high strength.

scholarly journals A method for pet mechanical properties enhancement

2019 ◽  
Vol 10 (8) ◽  
pp. 1725
Author(s):  
Raffaella Aversa ◽  
Relly Victoria Virgil Petrescu ◽  
Antonio Apicella ◽  
Florian Ion Tiberiu Petrescu
Keyword(s):  
Mechanical Properties ◽  
Liquid Crystalline ◽  
Liquid Crystalline Polymers ◽  
Molecular Structures ◽  
Reactive Blending ◽  
Scanning Calorimetry ◽  
Shear Transfer ◽  
Crystalline Polymers ◽  
Reactive Compatibilizer

A method for PET mechanical properties enhancement by reactive blending with HBA/HNA Liquid Crystalline Polymers for in situ highly fibrillar composites preparation is presented. LCP/PET blends were reactively extruded in presence of Pyromellitic Di-Anhydride (PMDA) and then characterized by Differential Scanning Calorimetry, Thermally Stimulated Currents and tensile mechanical properties. Moderate amounts of LCP in the PET (0.5 and 5%) and small amounts of thermo-active and reactive compatibilizer in the blend (0.3%) were found to significantly improve LCP melt dispersion, melts shear transfer and LCP fibril formation and adhesion. An unexpected improvement was probably due to the presence of two distinct phases’ supra-molecular structures involving PET-LCP and PMDA.

Macro, Micro and Nanoscale Bamboo Fiber as a Potential Reinforcement for Composites

2015 ◽  
Vol 668 ◽  
pp. 11-16 ◽  
Author(s):  
Viviane da Costa Correia ◽  
Fabíola Maria Siqueira ◽  
Rafael Donizetti Dias ◽  
Holmer Savastano
Keyword(s):  
Mechanical Properties ◽  
High Strength ◽  
Bamboo Fiber ◽  
Partial Replacement ◽  
Synthetic Fibers ◽  
Chemical Pulping ◽  
Tropical Areas ◽  
Bamboo Fibers ◽  
Mechanical Nanofibrillation ◽  
Inorganic Matrices

Vegetal fibers are obtained from leaves, stalks, culms, fruit and seeds, and have been used in the macro, micro and nanoscale as partial replacement of synthetic fibers in organic and inorganic matrices. Bamboo has high strength fibers, and is one of main nonwood resources and is available in tropical areas worldwide. These characteristics justify the study and application of bamboo fiber as reinforcement in the macro, micro and nanoscale. The macrofibers were obtained from bamboo culms, the microfibers from the chemical pulping and the nanofibers were obtained from the mechanical nanofibrillation of the pulp. The fibers were subjected to chemical, physical, mechanical and morphological tests. There was modification in the chemical composition of the bamboo after pulping, such as decrease of amount of the lignin, hemicellulose and extractives in 42.4%, 33.3% and 83.7%, respectively.The bamboo fibers width have been reduced from 0.26 mm to 19.8 μm after pulping and after nanofibrillation process the width was reduced from 19.8 μm to 16.2 nm.The decrease of the fibers dimension can be seen from the micrographs and analyzing it mechanical properties, the bamboo fibers are a reinforcement potential in macro, micro and nanoscale to organic and inorganic matrices.

Manufacturing Technique and Property Evaluation of Eco-Friendly Kevlar/PET/Nylon Composite Geotextile

2013 ◽  
Vol 365-366 ◽  
pp. 1157-1160 ◽  
Author(s):  
Ching Wen Lin ◽  
Wen Hao Hsing ◽  
Ching Wen Lou ◽  
Jin Mao Chen ◽  
Jia Horng Lin
Keyword(s):  
Mechanical Properties ◽  
Polyethylene Terephthalate ◽  
High Strength ◽  
Air Permeability ◽  
Soil Protection ◽  
Bursting Strength ◽  
Property Evaluation ◽  
Recycled Polyethylene ◽  
Nylon Composite ◽  
Tearing Strength

This study produces composite geotextile, and evaluates its effectiveness of being used for soil protection. Kevlar fibers, high strength polyethylene terephthalate (HPET) fibers, recycled polyethylene terephthalate (RPET) fibers, and nylon grids are made into Kevlar/PET/Nylon composite geotextiles, which are then tested for air permeability, and tensile, tearing, and bursting strength. The experimental results show that when the ratio of Kevlar fibers to HPET is 0/40, the resulting composite geotextile has the optimum mechanical properties, where the tensile strength is approximately 990 N, tearing strength is approximately 890 N, bursting strength is approximately 3700, and an air permeability is around 35 cm3/cm2/s.

scholarly journals The mechanical properties of brick containing recycled concrete aggregate and polyethylene terephthalate waste as sand replacement

2018 ◽  
Vol 34 ◽  
pp. 01001
Author(s):  
Faisal Sheikh Khalid ◽  
Nurul Bazilah Azmi ◽  
Puteri Natasya Mazenan ◽  
Shahiron Shahidan ◽  
Noorwirdawati Ali
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Polyethylene Terephthalate ◽  
High Strength ◽  
Recycled Concrete ◽  
Concrete Aggregate ◽  
Recycled Concrete Aggregate ◽  
Natural Sand ◽  
Pet Waste ◽  
Recycle Concrete Aggregate

This research focuses on the performance of composite sand cement brick containing recycle concrete aggregate and waste polyethylene terephthalate. This study aims to determine the mechanical properties such as compressive strength and water absorption of composite brick containing recycled concrete aggregate (RCA) and polyethylene terephthalate (PET) waste. The bricks specimens were prepared by using 100% natural sand, they were then replaced by RCA at 25%, 50% and 75% with proportions of PET consists of 0.5%, 1.0% and 1.5% by weight of natural sand. Based on the results of compressive strength, only RCA 25% with 0.5% PET achieve lower strength than normal bricks while others showed a high strength. However, all design mix reaches strength more than 7N/mm2 as expected. Besides that, the most favorable mix design that achieves high compressive strength is 75% of RCA with 0.5% PET.

scholarly journals Effect of Recycled Polyethylene Terephthalate Strips on the Mechanical Properties of Cement-Treated Lateritic Sandy Soil

2020 ◽  
Vol 12 (23) ◽  
pp. 9801
Author(s):  
Maitê Rocha Silveira ◽  
Paulo César Lodi ◽  
Natália de Souza Correia ◽  
Roger Augusto Rodrigues ◽  
Heraldo Luiz Giacheti
Keyword(s):  
Mechanical Properties ◽  
Polyethylene Terephthalate ◽  
Sandy Soil ◽  
High Strength ◽  
Cement Composite ◽  
Natural Soil ◽  
Direct Shear Tests ◽  
Soil Cement ◽  
Recycled Polyethylene ◽  
Ductile Behavior

The civil engineering construction industry is nowadays one of the largest consumers of natural resources. Therefore, the proposal of using alternative materials that seek to reduce waste production or the use of previously generated waste is becoming increasingly necessary. This paper evaluated the effect of recycled polyethylene terephthalate (PET) strips on the mechanical properties of a cement-treated lateritic sandy soil. Unconfined compression strength (UCS) tests were conducted in natural and PET strips mixtures in different strips lengths and contents. In addition to UCS tests, compaction tests were also conducted in order to analyze the effect of these inclusions on the properties of a lateritic sandy soil. Lastly, direct shear tests were conducted on natural soil-strip, soil-cement, and soil-cement-strip composites using optimum UCS results. The addition of strips to the soil-cement composite showed an increase in the soil cohesion parameter. The inclusion of strips also provided a more ductile behavior to the soil, presenting greater deformations with fewer stress peaks. Results showed that the recycled strips’ inclusion in soil-cement can provide a material with high strength, ductility, and a highly sustainable alternative.

ANALYZING THE MECHANICAL PROPERTIES OF THERMOPLASTIC REINFORCED WITH NATURAL FIBERS

2021 ◽  
Author(s):  
NIDHI M. THANKI ◽  
ABIGAIL HENDERSON ◽  
JOE FEHRENBACH ◽  
CHAD ULVEN ◽  
ALI AMIRI
Keyword(s):  
Mechanical Properties ◽  
Automobile Industry ◽  
Impact Test ◽  
Mechanical Test ◽  
Natural Fibers ◽  
High Strength ◽  
Sisal Fiber ◽  
Test Results ◽  
Synthetic Fibers ◽  
Glass Carbon

Synthetic fibers such as glass, carbon, etc., are used as reinforcement in polymer composites due to their high strength and modulus. However, synthetic fibers contribute to high costs and have a significant environmental impact. To overcome this challenge, various natural fibers, including banana, kenaf, coir, bamboo, hemp, and sisal fiber, as reinforced in a polymer matrix are investigated for mechanical properties. In this study, biocomposites with natural fibers as reinforced are developed and characterized. Treated and untreated natural fibers such as flax, maple, and pine as reinforced in thermoplastic, in this study, polypropylene (PP), are investigated for the mechanical properties, including tensile, flexural, and impact test. Mechanical test results exhibited that adding the natural fibers enhanced the tensile, flexural, and impact properties. It can be inferred that these biocomposites can be used as potential materials for the automobile industry.

Effects of cooling rate on the mechanical properties of dual phase treated vanadium steels

1983 ◽  
Vol 41 ◽  
pp. 220-221
Author(s):  
L.J. Chen ◽  
H.C. Cheng ◽  
J.R. Gong ◽  
J.G. Yang
Keyword(s):  
Mechanical Properties ◽  
Cooling Rate ◽  
Automobile Industry ◽  
High Strength ◽  
Weight Percent ◽  
Low Alloy Steels ◽  
Dual Phase ◽  
Resource Requirement ◽  
Alloy Steels ◽  
Potential Weight

For fuel savings as well as energy and resource requirement, high strength low alloy steels (HSLA) are of particular interest to automobile industry because of the potential weight reduction which can be achieved by using thinner section of these steels to carry the same load and thus to improve the fuel mileage. Dual phase treatment has been utilized to obtain superior strength and ductility combinations compared to the HSLA of identical composition. Recently, cooling rate following heat treatment was found to be important to the tensile properties of the dual phase steels. In this paper, we report the results of the investigation of cooling rate on the microstructures and mechanical properties of several vanadium HSLA steels.The steels with composition (in weight percent) listed below were supplied by China Steel Corporation: 1. low V steel (0.11C, 0.65Si, 1.63Mn, 0.015P, 0.008S, 0.084Aℓ, 0.004V), 2. 0.059V steel (0.13C, 0.62S1, 1.59Mn, 0.012P, 0.008S, 0.065Aℓ, 0.059V), 3. 0.10V steel (0.11C, 0.58Si, 1.58Mn, 0.017P, 0.008S, 0.068Aℓ, 0.10V).

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