Modification of polyethylene by radiation-induced graft copolymerization of N-phenylmaleimide and p-hydroxy N-phenylmaleimide

Aly, Raouf O.; Mostafa, Tahia B.; Mokhtar, S. M.

doi:10.1016/s0142-9418(02)00009-0

Cited by 9 publications

(6 citation statements)

References 21 publications

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“…In a previous paper, we reported the possible chemical reactions of MAH grafting to the PE chain during UV radiation cross-linking [15]. Some experimental studies have confirmed that maleimide and its derivatives can be used as a modifier for polymer to improve its specific performance, which can also be grafted onto PE and function as a photoinitiator [16,17,18,19,20]. Bismaleimide, which has two ethylene groups and four carbonyl groups, may act as the cross-linking agent and deep traps grafted to the macromolecules.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Study on the Grafting Reaction of Maleimide to Polyethylene in the UV Radiation Cross-Linking Process

et al. 2018

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Theoretical investigation of the reaction of graft maleimide to polyethylene in the UV radiation cross-linking process is accomplished at the B3LYP/6-311+G(d,p) level for high-voltage cable insulation materials. The reaction potential energy surface of the nine reaction channels is identified. The results show that the N,N′-ethylenedimaleimide can connect two 4-methylheptane molecules and act as the cross-linking agent. The calculated reaction potential barrier of forming 4-methylheptane radical by maleimide is higher than that of maleic anhydride. The study is expected to provide a basis for optimizing the UV radiation cross-linking polyethylene process and development more than 500 kV high-voltage cable insulation materials in practical applications.

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Section: Introductionmentioning

confidence: 99%

Theoretical Study on the Grafting Reaction of Maleimide to Polyethylene in the UV Radiation Cross-Linking Process

et al. 2018

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“…Therefore, there is much interest in the surface modification of polymers to create different and new applications. [1][2][3] Modified polymer surfaces have a number of improved properties, such as adhesion, [4][5][6] hydrophilicity, 7 antistatic nature, 8 wearability, 9,10 dyeing ability, 11 and biocompatibility. 12 The graft polymerization of monomers onto the surfaces of polymers is one of the main efficient processes for inducing modification.…”

Section: Introductionmentioning

confidence: 99%

Surface functionalization of polyolefin films via the ultraviolet‐induced photografting of acrylic acid: Topographical characterization and ability for binding antifungal agents

Costamagna¹,

Wunderlin²,

Larrañaga³

et al. 2006

J of Applied Polymer Sci

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ABSTRACT:The photoinduced graft copolymerization of acrylic acid with ultraviolet radiation onto films of poly (vinyl chloride), polypropylene, and polyethylene was studied. Benzophenone was used as the initiator for most of the experiments performed. The percentage of grafting was determined by gravimetric measurements, and the characterization of the grafted films was carried out by chemical analysis (Fourier transform infrared spectroscopy, volumetric titration, and dye adsorption). In all samples, the grafted yield increased with the ultraviolet exposure time. High levels of grafting were obtained at room temperature. In addition, optical and atomic force microscopy allowed the topography of the modified films to be studied as a function of the reaction time. The pendant functional groups that were grafted were then used to bind antifungal agents, such as natamycin and crystal violet, and the antifungal properties of the films were demonstrated.

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“…Conventional grafting processes are initiated by oxygen‐centered radicals derived from the decomposition of organic peroxides 1, 2. Grafting polyethylene with acrylonitrile monomers by a free‐radical reaction, by either chemical radical starters3–7 or irradiation,8–12 has already been performed to initiate the process.…”

Section: Introductionmentioning

confidence: 99%

Enzyme‐mediated grafting of acrylamide to ultrahigh molecular weight polyethylene fiber: A novel radical initiation system

Zhao

Guo

Liang

et al. 2005

J of Applied Polymer Sci

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ABSTRACT:The enzyme-mediated grafting of acrylamide (AM) to ultrahigh molecular weight polyethylene (UHMWPE) fibers using horseradish peroxidase (HRP) was demonstrated. To optimize the reaction condition, the concentrations of monomer, H 2 O 2 , the initiator, and time were varied. The grafting results were discussed and a reaction mechanism was proposed. Function groups and structural change of the graft copolymer were determined by FTIR spectroscopic and scanning electron microscopy micrographs for proof of grafting and the results were discussed. Results show that the surface of treated fiber becomes rougher than the untreated surface. Compared to unmodified fiber, modified fiber surface had significantly increased the interfacial shear strength, and carbonyl-stretching regions in the IR spectra. The interfacial shear strength of the UHMWPE fiber increased, clearly indicating that enzymaticgrafted acrylamide could significantly increase the hydrophilicity of the surfaces of UHMWPE fibers. Moreover, the hydrophilicity of treated fiber depends on the monomer concentration, the initiator concentration, and oxidizing agent concentration as well as the time of the reaction.

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Modification of polyethylene by radiation-induced graft copolymerization of N-phenylmaleimide and p-hydroxy N-phenylmaleimide

Cited by 9 publications

References 21 publications

Theoretical Study on the Grafting Reaction of Maleimide to Polyethylene in the UV Radiation Cross-Linking Process

Theoretical Study on the Grafting Reaction of Maleimide to Polyethylene in the UV Radiation Cross-Linking Process

Surface functionalization of polyolefin films via the ultraviolet‐induced photografting of acrylic acid: Topographical characterization and ability for binding antifungal agents

Enzyme‐mediated grafting of acrylamide to ultrahigh molecular weight polyethylene fiber: A novel radical initiation system

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