HDPE chemical recycling promoted by phenol solvent

Vicente, Gemma; Aguado, J.; Serrano, David; Sánchez, Nieves Núñez

doi:10.1016/j.jaap.2008.10.007

Cited by 42 publications

(19 citation statements)

References 26 publications

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“…Grafting by chemical means can advance in two distinct pathways, namely free radical generation and/or ionic generation methods (32,53,54). In chemical means of grafting, a great importance is placed on the initiatory chemical as it is this entity that establishes the principle pathway by which the grafting process will eventually occur (40,41,53). The grafting process of a polymer can be accomplished under different conditions of the monomer: The parent polymer can be treated with an aqueous solution, vapor phase, or plasma phase of the monomer (31,41,53).…”

Section: Chemical Graftingmentioning

confidence: 99%

“…In chemical means of grafting, a great importance is placed on the initiatory chemical as it is this entity that establishes the principle pathway by which the grafting process will eventually occur (40,41,53). The grafting process of a polymer can be accomplished under different conditions of the monomer: The parent polymer can be treated with an aqueous solution, vapor phase, or plasma phase of the monomer (31,41,53). However, the major limitation confronted and the explanation for the privation of its extensive employment in industrial graft copolymerization, expressly with the free radical-based systems, is the concurrent formation of homopolymer (11,38,55,56).…”

Section: Chemical Graftingmentioning

confidence: 99%

“…Generation of radicals by direct irradiation via UV/ microwaves (40,41) Direct radical generation eliminates need of initiators and washout steps (42,43) Irradiation is non-penetrative and only allows surface modification (42,43) Enzymatic grafting…”

Section: Photo-initiated Graftingmentioning

confidence: 99%

“…Although several measures can be appropriated to prevent side reactions, the practicality is that many side reactions can eventuate thus appreciably limiting the use of the radical initiated grafting technique (40,41). During the initiation process, the R˙radicals that are synthesized can spontaneously undergo isomerization such as intramolecular hydrogen abstraction prior to monomer addition according to Table III: Eq.…”

Section: Photo-initiated Graftingmentioning

confidence: 99%

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A Review of Polymeric Refabrication Techniques to Modify Polymer Properties for Biomedical and Drug Delivery Applications

et al. 2013

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Abstract. Polymers are extensively used in the pharmaceutical and medical field because of their unique and phenomenal properties that they display. They are capable of demonstrating drug delivery properties that are smart and novel, such properties that are not achievable by employing the conventional excipients. Appropriately, polymeric refabrication remains at the forefront of process technology development in an endeavor to produce more useful pharmaceutical and medical products because of the multitudes of smart properties that can be attained through the alteration of polymers. Small alterations to a polymer by either addition, subtraction, self-reaction, or cross reaction with other entities have the capability of generating polymers with properties that are at the level to enable the creation of novel pharmaceutical and medical products. Properties such as stimuli-responsiveness, site targeting, and chronotherapeutics are no longer figures of imaginations but have become a reality through utilizing processes of polymer refabrication. This article has sought to review the different techniques that have been employed in polymeric refabrication to produce superior products in the pharmaceutical and medical disciplines. Techniques such as grafting, blending, interpenetrating polymers networks, and synthesis of polymer complexes will be viewed from a pharmaceutical and medical perspective along with their synthetic process required to attain these products. In addition to this, each process will be evaluated according to its salient features, impeding features, and the role they play in improving current medical devices and procedures.

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Section: Chemical Graftingmentioning

confidence: 99%

Section: Chemical Graftingmentioning

confidence: 99%

Section: Photo-initiated Graftingmentioning

confidence: 99%

Section: Photo-initiated Graftingmentioning

confidence: 99%

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A Review of Polymeric Refabrication Techniques to Modify Polymer Properties for Biomedical and Drug Delivery Applications

et al. 2013

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“…19 The presence of phenol enhanced the reaction such that a complete conversion into C 1 -C 55 hydrocarbons was achieved. The yield of a-olefins as main products increased with the amount of phenol, indicating that the phenol promotes the thermal degradation of high-density polyethylene.…”

Section: Effects Of Additives and Catalystsmentioning

confidence: 99%

Development of materials and technologies for control of polymer recycling

Nishida

2011

Polym J

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The movement toward a recycling-based society through the essential development of recyclable materials alongside technologies for controlling recycling is reviewed. Recently, there has been progress in producing various polymers and technologies with the aim of achieving circulative utilization. For example, the upgrade recycling of commodity plastics, selective transformation of engineering plastics, selective depolymerization of various polymers in supercritical fluids, crosslinking-decrosslinking control using reversible reactions and developments in biomass-based recyclable polymers. Despite great strides taken in the effectiveness, efficiency and precision of these polymers and technologies, further improvements will be required to meet the practical requirements of a responsible sustainable system for the recycling of containers, packages, electric household appliances and end-of-life vehicles all of which are operated in compliance with the recycling laws of Japan.

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