Effect of bio-alkyd resin oil content and viscosity on the adhesion of EPDM to polyester fabric

Lawandy, S. N.; Moustafa, Hesham; Zahran, M. A.; Rabee, Marwa

doi:10.1080/01694243.2017.1354668

Cited by 8 publications

(4 citation statements)

References 28 publications

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“…The formation mechanism of the interfacial layer is that the viscosity of the epoxy resin will reduce with the increase of temperature before reaching gel point, resulting in its molecular chains moving easier and penetrating the EPDM rubber. In addition, the interfacial layer will be formed for the epoxy and may solidify and harden after reaching the gel point [ 38 , 39 ]. Interfacial entanglement and mechanical locking are the main reasons for the outstanding bond strength of composites.…”

Section: Resultsmentioning

confidence: 99%

Preparation Optimization of CFRP and EPDM Composite by the Co-Curing Method

et al. 2023

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As the requirements of aerospace technology become more rigorous, the performance of solid rocket motor (SRM) cases needs to be further optimized. In the present study, a co-curing technique was used to fabricate carbon fiber reinforced polymer (CFRP)/ethylene-propylene-diene monomer (EPDM) composites whereby the properties of CFRP/EPDM composites were adjusted by varying the temperature, heating time and type of vulcanizing agent to obtain the optimum manufacturing process. The results of crosslink density (3.459 × 10−4 mol/cm3) tested by nuclear magnetic resonance (NMR), a 90° peel strength test (2.342 N/mm), and an interlaminar shear test (ILSS = 82.08 MPa) demonstrated that the optimum mechanical properties of composites were obtained under the temperature 160 °C heated for 20 min with the curing agent DCP/S. The interfacial phase and bonding mechanism of composites were investigated by scanning electron microscopy (SEM). Thermogravimetric analysis (TGA) further indicated that EPDM/DCP/S had favorable thermal stability. This will provide valuable recommendations for the optimization of the SRM shell preparation process.

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Section: Resultsmentioning

confidence: 99%

Preparation Optimization of CFRP and EPDM Composite by the Co-Curing Method

et al. 2023

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“…It is the most important parameter during testing of the quality of paint because it determines the extent to which the paint can be applied on the surface using a brush or roller. It can be measured in terms of seconds using a flow cup or in Krebs Units (KU) by using a viscometer (Lawandy et al, 2018). Much higher viscosity means there is less solvent in the paint and vice versa is true, meaning the paint cannot be applied on a surface.…”

Section: Resultsmentioning

confidence: 99%

Quality improvement of long oil alkyd (LOA) resin requirements in the formulation of Hi-gloss paints

James

Taifa

2022

IJQRM

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PurposeThis research aimed at lowering the non-volatile matter (NVM) of long oil alkyd (LOA) resin to meet the resin requirements in producing Hi-gloss paints. The research also aimed to assist Hi-gloss paint manufacturers who require solid resin content below 70%.Design/methodology/approachThe research utilised both the document review and experimental methods. The experimental method, which involved the blending process, was used in lowering the NVM of LOA resin, whereby eight experiments were conducted as reputations to obtain accurate data and results. A factorial design was used in the design of the experiment (DOE), where three factors were required to be evaluated: specific gravity, viscosity and NVM and two levels were required: weight of LOA and white spirit.FindingsThe NVM of LOA resin was successfully lowered, and different shades of paint were produced for reliability testing. The quality parameters of Hi-gloss paints that used the modified LOA were all found within the company's specifications compared to those with unmodified LOA, where some parameters were either above or below the specifications. However, all samples with the NVM of LOA used below 50% were found to be poor in terms of quality during the reliability testing. So, if the company had used the modified LOA resin in the production of Hi-gloss paints, it would have potentially saved 18,925.2 kg and 9,446.4 kg, respectively, of LOA just in producing Hi-gloss black and white paints only. Moreover, the cost of 1 kg of LOA is $2.3, which is equal to Tanzanian Shillings (Tshs) 5,290. The company would have potentially saved Tshs 100.114 million Tshs and Tshs 49.97 million Tshs in producing Hi-gloss black and white paints, respectively, making a total of Tshs 150.08 million per year. This was counted as a loss during that year because they did not use LOA resin with 50% NVM in production.Research limitations/implicationsThis study focused on LOA resin used in producing Hi-gloss paints. The study also did not consider other categories of alkyd resins used in producing paints and varnishes e.g. epoxy resin and short and medium oil alkyd resins.Originality/valueThis is probably the first alkyd resin improvement study conducted using white spirit as Tanzania's main agent or material. The study utilised vegetable oils such as coconut, sunflower and tobacco seeds.

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“…El uso del resorcinol en conjunto con otros agentes es muy utilizado para mejorar la adhesión de materiales de refuerzo, ya sean de tipo orgánico o inorgánico en la formulación de hules sintéticos o naturales. Como material compatibilizante el resorcinol tradicionalmente se ha usado en conjunto con formaldehído como látex ((RFL), Seo 1997, De et al 2006, Parambath Kanoth et al 2019) o como en este trabajo con hexametilentetramina ((R-HMT), Dressler 1994, Varghese et al 1994, Jacob et al 2006, El-Wakil 2011, Halim et al 2013, Jiang y Gu 2020, donde se forma un complejo similar al que se forma con el RFL, el cual genera adhesividad (Lawandy et al 2018, Wisojodharmo et al 2020.…”

Section: Introductionunclassified

Efecto en las propiedades mecánicas de una resina pinífera modificada biodegradable, al utilizarla como compatibilizante o acoplante en formulaciones elastoméricas sin o con fibra de agave y hule de poli(estireno-butadieno). Un paso hacia la formulación de elastómeros verdes

Aranda-García

Rodríguez-Ortiz

Mendizábal

et al. 2021

Maderas, Cienc. tecnol.

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En este trabajo se valora la eficiencia de una resina de pino modificada biodegradable (A-30), al utilizarla como compatibilizante o acoplante para sustituir al resorcinol (que es tóxico y no es biodegradable), comparando las propiedades mecánicas (contra formulaciones preparadas usando el sistema resorcinol-hexametilentetramina (R-HMT) en: a) polímeros elastoméricos reticulados de estireno-butadieno (SBR), y: b) compósitos de SBR reforzados con fibra de agave de desecho. Para la comparación como compatibilizante, aquí se preparan formulaciones equivalentes con A-30 o R-HMT. Para la comparación de los compósitos equivalentes, se varía el agente de acoplamiento (R-HMT o A-30) y la cantidad de azufre como agente de entrecruzamiento (2,5 partes por cien de elastómero (phr), 7,5 phr o 15 phr).En las pruebas de tracción a temperatura ambiente, y el análisis mecanodinámico con barridos de temperatura (de -70 °C a 40 °C) y frecuencia (de 0,4 Hz a 40 Hz), se obtuvieron incrementos en módulos (hasta un 74 % en módulo de Young) y en capacidad de deformación (hasta 260 %), para los materiales conteniendo el agente A-30, por encima de las formulaciones en las que se usó el resorcinol. El mejor desempeño como compatibilizante o acoplante del A-30, se reflejó también con claridad morfológicamente mediante microscopía electrónica de barrido, al mostrar mayor compacidad en la matriz formulada y mayor cercanía entre fibra y matriz en muestras fracturadas criogénicamente. Se ha demostrado aquí, que el A-30 puede sustituir al par R-HMT con éxito, ya que funciona mejor como agente Maderas-Cienc Tecnol 23(2021):65, 1-29 Ahead of Print: Accepted Authors Version compatibilizante o acoplante y es biodegradable. Este tipo de agentes tiene un gran potencial para contribuir al desarrollo de elastómeros y compósitos flexibles amigables con el medio ambiente.Palabras clave: Agente de acoplamiento, compatibilizante, compósito de SBR/fibra, fibra de agave, resina de pino, resina maleinizada.

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Effect of bio-alkyd resin oil content and viscosity on the adhesion of EPDM to polyester fabric

Cited by 8 publications

References 28 publications

Preparation Optimization of CFRP and EPDM Composite by the Co-Curing Method

Preparation Optimization of CFRP and EPDM Composite by the Co-Curing Method

Quality improvement of long oil alkyd (LOA) resin requirements in the formulation of Hi-gloss paints

Efecto en las propiedades mecánicas de una resina pinífera modificada biodegradable, al utilizarla como compatibilizante o acoplante en formulaciones elastoméricas sin o con fibra de agave y hule de poli(estireno-butadieno). Un paso hacia la formulación de elastómeros verdes

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