Estudo da reação entre polietileno glicol e resina epoxídica na presença de N,N-dimetilbenzilamina

Zacharuk, Mario; Becker, Daniela; Coelho, Luci Boa Nova; Pezzin, Sérgio Henrique

doi:10.1590/s0104-14282011005000009

Cited by 5 publications

(4 citation statements)

References 23 publications

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“…Before binder burnout, 4 bands were localized at 3398, 2876, 1124, 1068 cm -1 corresponding to OH, C-H, C-O-C, and C-O groups, respectively, indicating the presence of polyethylene glycol. After heat treatment such bands were absents, indicating that the binder burnout had been successfully, eliminating organic components from the green bodies [5,6,7].…”

Section: Resultsmentioning

confidence: 99%

Organic Binder Burnout in Alumina Processing

Trindade¹,

Chagas²,

Gomes³

et al. 2014

MSF

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Incomplete binder removal may introduce severe defects during ceramic processing. This work presents a new method to eliminate polyethylene glycol used as a binder in pre-sintering steps of alumina parts. The effectiveness of the proposed method was evaluated by density and pore size measurements, as well as thermogravimetry (TG), differential thermal analysis (DTA), volumetric physical adsorption analyzer (BET), and Fourier transformed infrared spectroscopy (FTIR). The results show that the new method, although relatively slow in comparison with traditional procedures, yields smaller pore sizes and better mechanical properties of the final products.

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Section: Resultsmentioning

confidence: 99%

Organic Binder Burnout in Alumina Processing

Trindade¹,

Chagas²,

Gomes³

et al. 2014

MSF

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“…Literature points out that PEG block can react with epoxy phase [14][15][16] and PE block presents affinity with HDPE phase 17 . Zacharuk et al 14 studied epoxy nanocomposites with carbon nanotubes functionalized with poly(ethylene glycol).…”

Section: Introductionmentioning

confidence: 99%

Role of Cured Epoxy and Block Copolymer Addition in Mechanical and Thermal Properties of Polyethylene

et al. 2017

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This work aims to investigate the role of epoxy addition in high density polyethylene (HDPE) matrix. The block copolymer polyethylene-b-poly (ethylene glycol) (PEG-co-PE) was used as a compatibilizer. The samples were obtained by melt mixing using a torque rheometer. Instrumental nanoindentation was used to determine Young's modulus and nanohardness, thermal properties were analyzed by differential scanning calorimetry (DSC) and phase morphology was investigated through transmission and scanning electronic microscopy. The epoxy addition increased HDPE crystallinity by 13% and Young's modulus by 8%. The addition of PEG-co-PE decreased the size of dispersed phase by approximately 50% and improved phase adhesion and homogeneity compared to the blends without block copolymer. The experimental results were compared to numerical results obtained from the use of the homogenization by asymptotic expansion approach. The numerical results presented a fair agreement to the experimental values.

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“…There is much evidence that supports melting processing as the preferred production method of PP/MMT for commercial use [3][4][5][6][7] . Additionally, the literature suggests that the exfoliation and the dispersion of nanoclays in polypropylene requires the exchange of the sodium cations that are present in the nanoclay layers with the organophilic cations (dimethyl, dihydrogenated tallow, and quaternary ammonium chloride), which alters the initial interlayer spacing and improves the interaction between the clay and the PP [8,9] .…”

Section: Introductionmentioning

confidence: 99%

The influence of screw configurations and feed mode on the dispersion of organoclay on PP

Santos¹,

Demori²,

Mauler³

et al. 2013

Polímeros

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The design of the screw configuration as well as the screw speed, the residence time, the feeder type, and the temperature has a large effect on the dispersion of the clay into the matrix and, consequently, on the mechanical and thermal properties of the polymeric matrix. The objective of the present work was to evaluate the influence of two different screw configurations (left-handed elements) and the feed type (hopper or side feeder) on the dispersion of 5 wt% Cloisite 20A into the PP matrix without the use of compatibilising agents. In profile 1 (lower shear), the 5 wt% C20A/PP (PPC20AP1) nanocomposite morphology presented elliptical agglomerated structures with compacted platelets, whereas in the profile 2, the 5 wt% C20A/PP (PPC20AP2) showed elongated forms with better separated platelets and a better clay distribution into the PP matrix. When the side feeder mode was used in profile 2, a mix of elliptical and elongated structures with some individual clay sheets was observed.The neat PP showed the same tensile modulus and impact strength in both screw configurations. The PPC20AP1 presented a tensile modulus and an impact strength that was lower than the PPC20AP2, because in profile 2 the pressure and residence time are higher due to the two left-handed elements. Thus, the dispersion and distribution of the clay throughout the matrix were improved, and the agglomerated structures were reduced. When the side feeder mode was used, there was a decrease in the PP/clay mechanical properties, but the values found were higher than those in profile 1.

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Estudo da reação entre polietileno glicol e resina epoxídica na presença de N,N-dimetilbenzilamina

Cited by 5 publications

References 23 publications

Organic Binder Burnout in Alumina Processing

Organic Binder Burnout in Alumina Processing

Role of Cured Epoxy and Block Copolymer Addition in Mechanical and Thermal Properties of Polyethylene

The influence of screw configurations and feed mode on the dispersion of organoclay on PP

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