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Microplastic Formation and Surface Crack Patterns: A Method for Waste Plastic Identification [PDF]

open access: yesMolecules
Accumulation of plastic debris in marine environments has become a critical global issue, with microplastics (MPs) posing persistent ecological risks. This review synthesizes current knowledge on the formation mechanisms of MPs from polyolefins such as ...
Hisayuki Nakatani, Anh Thi Ngoc Dao
doaj   +2 more sources

Preparation of Hierarchical Co/Beta Catalyst and Its Application in Hydrogenation of CO to Aviation Kerosene

open access: yesCrystals, 2023
Due to the increasing depletion of petroleum resources, the production route of non-oil-based aviation kerosene has been paid more and more attention. In this regard, the process of preparing aviation kerosene from syngas (CO and H2) is one of the most ...
Yanliang Zhai   +7 more
doaj   +1 more source

High-Efficiency Mono-Cyclopentadienyl Titanium and Rare-Earth Metal Catalysts for the Production of Syndiotactic Polystyrene

open access: yesMolecules, 2023
Syndiotactic polystyrene (SPS) refers to a type of thermoplastic material with phenyl substituents that are alternately chirally attached on both sides of an aliphatic macromolecular main chain.
Bo Wen   +5 more
doaj   +1 more source

Polyolefin Elastomer Modified Asphalt: Performance Characterization and Modification Mechanism

open access: yesBuildings, 2023
The rapid growth of traffic load and volume has put forward higher requirements for road durability. To extend the service life of roads, this work investigated the feasibility of using polyolefin elastomers with a two-phase molecular structure to ...
Zhen Ye, Yuechao Zhao
doaj   +1 more source

Progress in oxidative degradation and recovery of polyolefin plastics

open access: yes能源环境保护, 2023
Polyolefin plastics play an important role in both production and life due to the excellent characteristics, such as east processing, low price and outstanding performance. It has become the most widely used plastics at present. The main raw materials of
LUO Xi, ZHAN Jiahui, ZHANG Shicheng*
doaj   +1 more source

Mechanical properties of polyolefin and polypropylene fibers-reinforced concrete–An experimental study

open access: yesComposites Part C: Open Access, 2023
Concrete, a widely used construction material, exhibits inherent brittleness and limited tensile strength. To address these shortcomings, the incorporation of fibers has gained prominence, with polyolefin and polypropylene fibers emerging as promising ...
Mojtaba Gorji Azandariani   +3 more
doaj   +1 more source

Unique Raoultella species isolated from petroleum contaminated soil degrades polystyrene and polyethylene

open access: yesEcotoxicology and Environmental Safety, 2023
Polyolefin plastics, such as polyethylene (PE) and polystyrene (PS), are the most widely used synthetic plastics in our daily life. However, the chemical structure of polyolefin plastics is composed of carbon-carbon (C-C) bonds, which is extremely stable
Yingbo Yuan   +8 more
doaj   +1 more source

Evaluation of Nonuniformity of Elastic Properties of Sheets Made from Closed-Сell Polyolefin Foams by Acoustic Method

open access: yesПриборы и методы измерений, 2021
The widespread use of polyolefin foams in strategically important industries is due to their high thermal, sound and vibration insulation properties. The aim of the work was to evaluate the non-uniformity of elastic properties over the area of sheets of ...
O. P. Bogdan   +4 more
doaj   +1 more source

Shear and Flexural Behavior of Flat Slabs Casted with Polyolefin Fiber-Reinforced Concrete

open access: yesFibers, 2022
This paper presents the influence of polyolefin fiber on the flexural and shear attitude on the flat slabs. Three slab sets (80 cm × 80 cm) were tested, each with a thickness of 10 cm.
Abdulnasser M. Abbas   +2 more
doaj   +1 more source

Photothermal recycling of waste polyolefin plastics into liquid fuels with high selectivity under solvent-free conditions

open access: yesNature Communications, 2023
The widespread use of polyolefin plastics in modern societies generates huge amounts of plastic waste. With a view toward sustainability, researchers are now seeking novel and low-cost strategies for recycling and valorizing polyolefin plastics.
Yingxuan Miao   +5 more
doaj   +1 more source

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