Synthesis and functionalization of ethylene/p-allyltoluene copolymer

Li, Huayi; Chen, Shangtao; Zhang, Xiaofan; Cui, Nannan; Zhang, Zhicheng; Lü, Yingying; Hu, Youliang

doi:10.1016/j.reactfunctpolym.2005.06.011

Cited by 11 publications

(3 citation statements)

References 16 publications

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“…Several examples have been reported recently concerning polysiloxane/polyolefin block or graft copolymers. With lithiated ethylene/ p ‐allyltoluene copolymers as the macroinitiator, Li et al synthesized polyethylene(PE)‐ g ‐polydimethylsiloxane(PDMS) following a graft‐from approach. The attempts to synthesize PE/PDMS graft copolymer by copolymerizing ethylene and ω‐vinyl PDMS macromonomer using Ziegler‐Natta or metallocene catalysts were not so successful due to the unavoidable poisoning of both catalysts .…”

Section: Introductionmentioning

confidence: 99%

One‐step synthesis of polysiloxane graft polyethylene mimic: Non‐expensive compatibilizer for polyethylene/polysiloxane blend

Zhang

Zhu

et al. 2020

Polymers for Advanced Techs

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Polysiloxane/polyolefin copolymers have drawn much attention recently and emerged as a new group of functional polyolefin since they possess distinctive properties and find great potential applications in many areas (eg, compatibilizer, processing aid and surface modifier). However, traditional routes to synthesize polysiloxane/polyolefin copolymers generally require multi-step labor-consuming procedures. Herein, we report a novel one-step synthesis of polydimethylsiloxane graft polyethylene (PDMS-g-PE) mimics. It was found that PDMS-g-PE mimics, namely vinylmethylsiloxanedimethylsiloxane-(C30-45 alkyl)methylsiloxane copolymers (short for VD-AMS), could be formed via a one-step synthetic procedure based on the siloxane equilibrium process between silanol-terminated vinylmethylsiloxane-methylsiloxane copolymer and (C30-45 alkyl)methylsilicone. The chemical structures of VD-AMS were characterized unambiguously using Fourier transform infrared spectroscopy, nuclear magnetic resonance, gel permeation chromatography, differential scanning calorimetry. The correlation between reaction conditions and the structural parameters of VD-AMS was established. Based on our experimental results, a plausible mechanism for the synthesis of VD-AMS was proposed. Scanning electron microscopy micrographs showed that VD-AMS could function as an efficient compatibilizer for immiscible PE/silicone blend.Given that the precursors of VD-AMS are commercially available with low prices and that VD-AMS can be easily synthesized under mild conditions, we believe VD-AMS can represent as a competitive potential compatibilizer due to its relatively low cost. K E Y W O R D S compatibilizer, one-step synthesis, polysiloxane graft polyethylene mimic, siloxane equilibrium process

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Section: Introductionmentioning

confidence: 99%

One‐step synthesis of polysiloxane graft polyethylene mimic: Non‐expensive compatibilizer for polyethylene/polysiloxane blend

Zhang

Zhu

et al. 2020

Polymers for Advanced Techs

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“…Nickel is a kind of silvery white metal with magnetic property, electrical conductivity, good chemical stability, high temperature stability and mechanical stability [5]. The Ni-Ag composite powders can improve the performance of Ni dramatically and the powders can be used as contact materials [6][7]. People usually get Ni powders by nickel carbonyl pyrolytic process, evaporation-condensation method, γ-ray radiation synthesis, alloy treatment, high-pressure hydrogen reduction method, ordinary-pressure liquid phase reduction method and latex emulsion method etc [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Ni90Ag10 Composite Nano-Powders by Chemical Co-Precipitation Hydrogen Reducing

Gao

Jin

et al. 2010

AMR

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The Ni(OH)2-Ag2O powders were prepared with materials NaOH, NiNO3•6H2O and AgNO3 by chemical co-precipitation method. The reaction conditions were that Ni2+ solution concentration 0.0943mol•L-1 and Ag+ solution concentration 0.0943mol•L-1 in the Ni2+-Ag+ composite solution concentration, the NaOH solution concentration 4mol•L-1, dropping speed of the NaOH solution 50ml•min-1, the pH value of reacting terminal 13, the stirring speed 1200r•min-1, the reacting temperature 25°C, the reacting time 60min. Ni(OH)2-Ag2O composite powders’ size was 2-50nm. Ni-Ag composite powders were prepared with materials Ni(OH)2-Ag2O composite powders by hydrogen reduction in closed circular system. Ni-Ag composite powders’ size was 2-40 nm.

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“…The compatibilizers are usually block or graft copolymers, which contain a polyolefin segment. [1][2][3][4][5][6][7] The graft copolymerization approach is widely used to synthesize functional polyolefin graft copolymers. Recently, the development of graft copolymers with welldefined polymers and copolymers by free radical process was made possible by the discovery of several controlled/''living'' radical polymerization systems.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of functional polyethylene graft copolymers by nitroxide‐mediated living radical polymerization

Mohajery

Rahmani

Entezami

2008

Polymers for Advanced Techs

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This paper describes a new method to prepare graft copolymers, such as polyethylene-g-polystyrene (PE-g-PS), with a relatively well-controlled reaction mechanism. The chemistry involves a transformation process from the metallocene copolymerization of ethylene and m,p-methylstyrene (m,p-MS) to nitroxide-mediated ''living'' free radical polymerization (LRFP) of styrene. The metallocene catalysis produces ethylene-co-m,p-methylstyrene (EMS) random copolymers. Next, 1-hydroxyl-2,2,6,6-tetramethylpiperidine (HO-TEMPO) was synthesized by the reduction of TEMPO with sodium ascorbate. The macroinitiator (EMS-TEMPO) was synthesized with the bromination reaction of EMS, and the following nucleofilic reaction with this functional nitroxyl compound. The resulting macroinitiator (EMS-TEMPO) for LRFP was then heated in the presence of styrene to form graft copolymer. DSC, 1 H-NMR, FTIR spectroscopy were employed to investigate the structure of the polymers. The results of Molau test showed that PE-g-PS could be a potential good compatilizer.Bisindenyl ethane zirconium dichloride was synthesized by modification of the literature methods. 24 A brief description of this method is as follows. Scheme 1. Copolymerization reaction of ethylene with m,p-methylstyrene and following bromination reaction.Scheme 2. Synthesis of macroinitiator EMS-TEMPO and polyethylene graft copolymer.

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Synthesis and functionalization of ethylene/p-allyltoluene copolymer

Cited by 11 publications

References 16 publications

One‐step synthesis of polysiloxane graft polyethylene mimic: Non‐expensive compatibilizer for polyethylene/polysiloxane blend

One‐step synthesis of polysiloxane graft polyethylene mimic: Non‐expensive compatibilizer for polyethylene/polysiloxane blend

Preparation and Characterization of Ni90Ag10 Composite Nano-Powders by Chemical Co-Precipitation Hydrogen Reducing

Synthesis of functional polyethylene graft copolymers by nitroxide‐mediated living radical polymerization

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