Effects of electron beam irradiation and multi-functional monomer/co-agents on the mechanical and thermal properties of ethylene-vinyl acetate copolymer/polyamide blends

Ahmed, Jawad; Wu, Jian; Mushtaq, Sidra; Zhang, Yong

doi:10.1016/j.mtcomm.2019.100840

Cited by 9 publications

(6 citation statements)

References 27 publications

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Section: Methodsmentioning

confidence: 99%

“…For this, as Table 1 shows, the PT/N20 and PT/N20+5P blends contain an agent for initiating grafting and crosslinking reactions (di-2-tert-butylisopropyl benzene) and a polyfunctional monomer (trimethylolpropane trimethacrylate) which possessed high reactivity; this can undergo free radical grafting reaction on the polymer chain producing a network structure. 19,20 The compounds were obtained by mixing technique, on Brabender Plasti-Corder internal mixer type, at 150°C for 7 min. The rotor speed was 30 r/min in the first 2 min and increased to 80 r/min for the next 5 min.…”

Section: Obtaining Compoundsmentioning

confidence: 99%

See 1 more Smart Citation

Polymeric compounds based on thermoplastic elastomer styrene-butadiene-styrene block copolymers and siliconic rubber powder

Stelescu

Sönmez

Georgescu

et al. 2022

Progress in Rubber, Plastics and Recycling Technology

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This paper presents the obtaining and characterization of polymeric composites based on thermoplastic elastomer type styrene-butadiene-styrene block copolymers and vulcanized rubber powder. The rubber powder used was obtained as waste in the technological processes in the rubber industry. It was analyzed by determining the acetonic extract, ash and FTIR analysis and it was observed that the base elastomer in the rubber waste is silicone rubber, and the amounts of inorganic fillers, plasticizers, antioxidants, lubricants etc. existing in the rubber powder are lower than 19%. The samples were obtained by mixing technique, on Brabender Plasti-Corder internal mixer type. The test specimens necessary to determine the characteristics were obtained on a laboratory electrical press at 170°C, applying a force of 300 kN, and moulding time 6 min. The characteristics of the obtained samples show that the addition of rubber powder improved the hardness and elasticity, and by the applying compatibility method, namely crosslinking and grafting in melt, in dynamic regime, there was a significant increase in hardness, elasticity, modulus 100%, tensile strength, and the material obtained is more compact. The new composites have physical and mechanical properties suitable for producing a wide range of rubber consumer goods.

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Section: Methodsmentioning

confidence: 99%

Section: Obtaining Compoundsmentioning

confidence: 99%

Polymeric compounds based on thermoplastic elastomer styrene-butadiene-styrene block copolymers and siliconic rubber powder

Stelescu

Sönmez

Georgescu

et al. 2022

Progress in Rubber, Plastics and Recycling Technology

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show abstract

“…The T max values of the second peak, which represented the melting peak, tended to shift toward the lower temperatures depending on the GMA content and the radiation dose. 30 This was attributed to an increase in the rate of degradation caused by exposure to higher radiation levels. The crosslinking between GMA-PEI and TMPTA was due to two endothermic processes and was indicative of the occurrence of multiple reactions during the crosslinking process.…”

Section: Differential Scanning Calorimetermentioning

confidence: 99%

Radiation crosslinking of linear polyethyleneimine‐based nanoparticles grafted to poly(glycidyl methacrylate) via trimethylolpropane triacrylate as potential electronic packaging material

Ibrahim

Lotfy

2021

J of Applied Polymer Sci

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Linear polyethyleneimine (L-PEI)-based nanoparticles were synthesized via hydrolysis of poly-2-methyl-2-oxazoline (PMeOx), which was prepared by cationic ring-opening polymerization of the oxazoline five-membered ring. Herein, a kinetic study of the ring-opening polymerization reaction is discussed. The nuclear magnetic resonance spectrum of PMeOx verified the presence of repeating units and terminal groups in the polymer's structure. Molar ratios of PEI and PMeOx were characterized using size exclusion chromatography with low-polydispersity polymer chains as the controlled polymerization reaction. PEI and PMeOx exhibited narrow particle size distribution with hydrodynamic radii of 89 and 67 nm, respectively, as determined via dynamic light scattering analysis. In addition, atomic forces and scanning electron microscopy were used to investigate the topography of the PEI thin films. Poly(glycidyl methacrylate) P(GMA) was grafted onto a PEI chain in the presence of trimethylolpropane triacrylate (TMPTA) as the crosslinking agent to synthesize the P(GMA-PEI-TMPTA) tripolymer via free radical polymerization using gamma irradiation. The thermal characterization of the P(GMA-PEI-TMPTA) tripolymer was conducted using thermogravimetric analysis and differential scanning calorimeter. Generally, the thermal stability of the P(GMA-PEI-TMPTA) tripolymer was improved at low-glycidyl methacrylate concentrations. The prepared tripolymer could be used as effective packaging materials for electronics industries.

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“…Sipaut et al 13 proved the crosslinking efficiency of the polyfunctional monomer is related to the nature of the matrix polymer and the types of functional groups in the polyfunctional monomer. Ahmed et al 32 reported that the gel contents of EVA blend containing the polyfunctional monomers as crosslinking promoters such as tripropylene glycol diacrylate, TMP, and pentaerythritol tetraacrylate (PETA), increased more significantly than that of EVA blend. With the increase in the amount of polymer monomer, the gel content increased gradually and tighter network structures were produced by enhancing blend crosslinking 25,33,34 .…”

Section: Introductionmentioning

confidence: 99%

Rheological behaviors and foaming behaviors of crosslinked ethylene–vinyl acetate with polyfunctional monomers

Wang,

Hua,

Zhang

et al. 2023

J of Applied Polymer Sci

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To produce ethylene–vinyl acetate (EVA) foams with a higher foaming ratio and stable cell size, the efficiency of the crosslinking reaction is required to conduct simultaneously with the blowing reaction. Hence, the multifunctional monomer trimethylolpropane trimethacrylate (TMP) as a crosslinking promoter and a crosslinking agent dicumyl peroxide are used together as a crosslinking system to EVA foaming, when chemical blowing agent azodicarbonamide (ADC) is used. The TMP concentration of approximately 1.0 phr (per hundred resin) is most effective for balancing the expansion ratio and fine cell size. In the SEM diagram and expansion ratio results, it can be found that when the concentration of TMP ranges from 0 to 1.0 phr, the cell mean size is reduced from 360.3 to 140.5 μm and the expansion ratio is reduced from 13.6 to 9.1 at 170°C. The results of time‐sweep experiment of thermogravimetric analysis (TGA) show that the foaming time of ADC in the melt increases with the addition of TMP. Capillary rheometer and rotational rheometer tests show that the viscosity and the crosslinking efficiency of the melt are improved with the TMP addition. The curing time has been reduced from 2.93 to 2.22 min for 170°C.

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Effects of electron beam irradiation and multi-functional monomer/co-agents on the mechanical and thermal properties of ethylene-vinyl acetate copolymer/polyamide blends

Cited by 9 publications

References 27 publications

Polymeric compounds based on thermoplastic elastomer styrene-butadiene-styrene block copolymers and siliconic rubber powder

Polymeric compounds based on thermoplastic elastomer styrene-butadiene-styrene block copolymers and siliconic rubber powder

Radiation crosslinking of linear polyethyleneimine‐based nanoparticles grafted to poly(glycidyl methacrylate) via trimethylolpropane triacrylate as potential electronic packaging material

Rheological behaviors and foaming behaviors of crosslinked ethylene–vinyl acetate with polyfunctional monomers

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