Physio-chemical interaction of Ethylene-Vinyl Acetate copolymer on bonding ability in the cementing material used for oil and gas well

Lanka, Sai Teja; Moses, Niclas Galih Anak; Suppiah, Raja Rajeswary; Maulianda, Belladonna

doi:10.1016/j.ptlrs.2021.10.003

Cited by 8 publications

(2 citation statements)

References 26 publications

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“…Meanwhile, the interaction between PCS and MH was also likely to induce the peak shift. It should be noted that the peak intensity of EVA/MH or EVA/MH/PCS at 720 cm −1 , corresponding to –CH 2 – bending in the vinyl chain segments of EVA, decreased in comparison to EVA [ 35 ], implying the interaction between MH and EVA. The hydrogen bonds between the ester groups in EVA and the hydroxyl groups in MH restricted the bending of methylene adjacent to VA groups.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Flame Retardancy in Ethylene–Vinyl Acetate Copolymer/Magnesium Hydroxide/Polycarbosilane Blends

Zhang

Wang

et al. 2021

Polymers

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A polymer ceramic precursor material—polycarbosilane (PCS)—was used as a synergistic additive with magnesium hydroxide (MH) in flame-retardant ethylene–vinyl acetate copolymer (EVA) composites via the melt-blending method. The flame-retardant properties of EVA/MH/PCS were evaluated by the limiting oxygen index (LOI) and a cone calorimeter (CONE). The results revealed a dramatic synergistic effect between PCS and MH, showing a 114% increase in the LOI value and a 46% decrease in the peak heat release rate (pHRR) with the addition of 2 wt.% PCS to the EVA/MH composite. Further study of the residual char by scanning electron microscopy (SEM) proved that a cohesive and compact char formed due to the ceramization of PCS and close packing of spherical magnesium oxide particles. Thermogravimetric analysis coupled with Fourier-transform infrared spectrometry (TG–FTIR) and pyrolysis–gas chromatography coupled with mass spectrometry (Py–GC/MS) were applied to investigate the flame-retardant mechanism of EVA/MH/PCS. The synergistic effect between PCS and MH exerted an impact on the thermal degradation products of EVA/MH/PCS, and acetic products were inhibited in the gas phase.

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Section: Resultsmentioning

confidence: 99%

Enhanced Flame Retardancy in Ethylene–Vinyl Acetate Copolymer/Magnesium Hydroxide/Polycarbosilane Blends

Zhang

Wang

et al. 2021

Polymers

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“…VAE can increase the ductility, cohesion and water resistance. It is used in concrete commonly [ 17 , 18 , 19 , 20 , 21 ], which can play a role in regulating strength and deformation. Therefore, this paper designs a single-factor influence test with VAE dosage as the change parameter.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on the Preparation of Soft Rock Similar Materials Using Redispersible Latex Powder as a Modifier

Zhang

Xiang

et al. 2022

Molecules

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The engineering geological problems of soft rock are common in large slope engineering and underground engineering surrounding rock. In order to study the change in mechanical properties of soft rock under the action of loading, excavation and rainfall, this paper carried out experimental research on similar materials of soft rock. The similar material of soft rock is prepared by using iron fine powder, barite powder and quartz sand as aggregate, gypsum as binder and redispersible latex powder as regulator. A single-factor influence test was designed with the content of redispersible latex powder as variation parameter. Analysis the influence of redispersible latex powder from the perspectives of physical and mechanical indexes, failure forms, stress–strain states and changes after water seepage. In addition, evaluate the feasibility of this similar material in geomechanical model test. Experimental results show that the density, compressive strength and Poisson’s ratio of similar materials can be improved to a certain extent by the redispersible latex powder with low dosage. However, the above indexes show a significant downward trend with the increase in dosage when the dosage exceeds 2%. The deformation modulus always shows a downward trend, and this trend becomes more significant especially when the dosage exceeds 2%. With the increase in the redispersible latex powder, the stress–strain curves of similar materials show obvious elastic and plastic stages. The failure mode gradually changes to X-shaped conjugate failure, which is common in soft rock, and the material changes from brittle failure to plastic failure. In addition, this type of similar material with gypsum as cementing agent will cause serious damage and loss of bearing capacity after seepage. These methods produce similar materials with low strength, low deformation modulus and plastic failure form, which can be used to simulate the stability of soft rock engineering caused by loading or excavation. At the same time, it also sheds lights on preparing similar materials of hard rock.

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Toughening effects of well-dispersed carboxylated styrene-butadiene latex powders on the properties of oil well cement

Zhao

Liu³

et al. 2022

Construction and Building Materials

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Physio-chemical interaction of Ethylene-Vinyl Acetate copolymer on bonding ability in the cementing material used for oil and gas well

Cited by 8 publications

References 26 publications

Enhanced Flame Retardancy in Ethylene–Vinyl Acetate Copolymer/Magnesium Hydroxide/Polycarbosilane Blends

Enhanced Flame Retardancy in Ethylene–Vinyl Acetate Copolymer/Magnesium Hydroxide/Polycarbosilane Blends

An Experimental Study on the Preparation of Soft Rock Similar Materials Using Redispersible Latex Powder as a Modifier

Toughening effects of well-dispersed carboxylated styrene-butadiene latex powders on the properties of oil well cement

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