Improved adhesion of polyethylene by copolymerisation of ethylene with polar monomers

Santos, Jorge Moniz; Ribeiro, M. Rosário; Portela, M.F.; Bordado, João

doi:10.1016/s0009-2509(01)00093-8

Cited by 28 publications

(6 citation statements)

References 5 publications

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“…We could not identify structures due to diene cyclisation reactions and the carbon and proton NMR spectra show the presence of the 5,7-DMO substituted double bond in the formed copolymers. Copolymer compositions were calculated from their 1 H NMR spectra and according to peak assignment already reported in literature [12,15].…”

Section: Polymer Characterisationmentioning

confidence: 99%

Crosslinking in metallocene ethylene-co-5,7-dimethylocta-1,6-diene copolymers initiated by electron-beam irradiation

Cerrada

Benavente

Pérez

et al. 2009

Polymer

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The synthesis of ethylene-co-5,7-dimethylocta-1,6-diene copolymers (CEDMO) with different molar DMO contents has been performed to incorporate double bonds in the lateral and make easier the development of crosslinkings in the resulting polymer material after application of electron-beam irradiation. The gel content as well as a comprehensive evaluation of the changes in the crystalline characteristics have been carried out. Both features are strongly dependent on DMO composition and irradiation doses. Variation in the mechanical response of the different specimens has been checked by microhardness measurements.

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Section: Polymer Characterisationmentioning

confidence: 99%

Crosslinking in metallocene ethylene-co-5,7-dimethylocta-1,6-diene copolymers initiated by electron-beam irradiation

Cerrada

Benavente

Pérez

et al. 2009

Polymer

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“…Currently, polyolefins constitute nearly 60% of all polymers produced . Although prepared on an enormous scale, the application of these polymeric hydrocarbons is limited by their low surface energies and poor adhesion with more polar materials, metals, and glass. ,− The effective preparation of polypropylene blends with polar macromolecules often requires the addition of polyolefin block or graft copolymers to prevent macrophase separation. − Therefore, the synthesis of polyolefins, particularly polypropylene, with polar side chains has been actively pursued. − …”

Section: Introductionmentioning

confidence: 99%

Catalytic Hydroxylation of Polypropylenes

et al. 2004

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The regioselective functionalization of both model and commercial polypropylenes of varying tacticity has been conducted by a rhodium-catalyzed functionalization of the methyl C-H bonds of the polymer with diboron reagents. Rhodium-catalyzed borylation of the polypropylenes, followed by oxidation of the boron-containing material, produced polymers containing 0.2-1.5% hydroxymethyl side chains. Both the number-average molecular weights and molecular weight distributions of the polypropylenes were essentially unchanged after the catalytic and oxidative functionalization process. The efficiency of the borylation process was affected by the molecular weight of the polymer, the steric hindrance around the methyl groups, and the ratio of the diboron reagent to the monomer repeat unit. The hydroxylated derivative of the commercial isotactic polypropylene was used as macroinitiator for the aluminum-mediated ring-opening polymerization of epsilon-caprolactone to prepare polypropylene-graft-polycaprolactone. This graft copolymer was an effective compatibilizer for melt blends of polypropylene and polycaprolactone.

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“…[137] Adhesion of an UA/ethylene copolymer with up to 1.7 mol % of UA to glass, PVC and steel was drastically improved while hardness and crystalinity were preserved. [138] Use of UA/ethylene copolymers, synthesized with a rac-EtA C H T U N G T R E N N U N G (Ind) 2 ZrCl 2 /MAO catalyst system, as compatibilizers in polyA C H T U N G T R E N N U N G (ethylene)/polyA C H T U N G T R E N N U N G (amide 6) (PE/PA6 40/60) blends, improved thoughness above a certain molar mass of the copolymer. Stiffness, strength as well as morphology (as observed by scanning electron microscopy) were also positively altered.…”

Section: Metallocene-catalyzed Copolymerizationmentioning

confidence: 99%

Undecylenic Acid: A Valuable and Physiologically Active Renewable Building Block from Castor Oil

2009

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A lot of attention is currently being paid to the transition to a biobased economy. In this movement, most efforts concentrate on the development of bioenergy applications including bioethanol, biodiesel, thermochemical conversion of biomass, and others. However, in the energy sector other nonbiomass alternatives are known, whereas no valuable alternatives are available when thinking about chemical building blocks. Therefore, it is also essential to develop new routes for the synthesis of bio-based chemicals and materials derived thereof. Such intermediates can originate either from plants or from animals. Castor oil is a non-edible oil extracted from the seeds of the castor bean plant Ricinus communis (Euphorbiaceae), which grows in tropical and subtropical areas. Globally, around one million tons of castor seeds are produced every year, the leading producing areas being India, PR China, and Brazil.2 10-Undecenoic acid or undecylenic acid is a fatty acid derived from castor oil that, owing to its bifunctional nature, has many possibilities to develop sustainable applications.

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Improved adhesion of polyethylene by copolymerisation of ethylene with polar monomers

Cited by 28 publications

References 5 publications

Crosslinking in metallocene ethylene-co-5,7-dimethylocta-1,6-diene copolymers initiated by electron-beam irradiation

Crosslinking in metallocene ethylene-co-5,7-dimethylocta-1,6-diene copolymers initiated by electron-beam irradiation

Catalytic Hydroxylation of Polypropylenes

Undecylenic Acid: A Valuable and Physiologically Active Renewable Building Block from Castor Oil

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