塑料沉积学:技术现状和未来的方向

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Updated: Jan 14, 2026

Extraction of Organochlorine Pesticides from Plastic Pellets and Plastic Type Analysis
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Extraction of Organochlorine Pesticides from Plastic Pellets and Plastic Type Analysis

Published on: July 1, 2017

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Gary Hampson1, Catherine Russell2, Ian A Kane3

  • 1Earth Science and Engineering, Imperial College London, London, UK.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences
|October 23, 2025
PubMed
概括

塑料垃圾是一种全球性污染物,无处不在,甚至在极地冰上. 了解它的特性和运动对于减轻对生态系统和人类健康的危害至关重要.

关键词:
降解降解降解降解降解.碎片化的碎片化 碎片化的碎片化微塑料微塑料的使用塑料的塑料塑料的塑料塑料的塑料的塑料沉积物的沉积物源到下沉的地方交通运输运输运输运输运输运输运输运输运输

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Types of Step-Growth Polymers: Polyesters

The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the polymer...
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Plastic deformation represents a fundamental concept in materials science, which explains the irreversible change in the shape of a material when it experiences stress beyond its elastic capability. This phenomenon is important in structural engineering, especially in designing and analyzing cantilever beams—structures that are securely fixed at one end and bear loads at the opposite end. When these beams are subjected to loads within their elastic range, they will return to their...
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Plasticizers

Water-reducers, or plasticizers, are chemical admixtures used in concrete to improve strength and workability. These additives reduce the water-cement ratio without compromising workability, lower the cement content while maintaining the same workability, or increase workability to assist concrete placement in inaccessible areas.
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Plastic Behavior

A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and...
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Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
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