Peroxide crosslinking of PVC foam formulations

Yañez-Flores, I.; Ibarra‐Gómez, Rigoberto; Rodríguez‐Fernández, Oliverio; Gilbert, Marianne

doi:10.1016/s0014-3057(99)00295-5

Cited by 19 publications

(16 citation statements)

References 6 publications

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“…Other DSC studies of PE and EVA were also carried out, and a kinetic model was suggested 24. Important effects and interactions among the different components of the formulations were observed including also the crosslinking process 22, 25–28…”

Section: Introductionmentioning

confidence: 99%

Soft PVC foams: Study of the gelation, fusion, and foaming processes. I. Phthalate ester plasticizers

Zoller

Marcilla

2011

J of Applied Polymer Sci

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The use of foamed plastics gains more and more interest every day. Flexible poly(vinyl chloride) (PVC) foams have excellent mechanical properties and low price, thus their application is extensive. Foams are produced from plastisols, which are based on the suspension of the PVC resin in a plasticizer. Phthalates are the most used plasticizers in flexible PVC foam formation. In this study, we have studied the influence of the phthalate ester-type plasticizers on the foaming process and the quality of the foams obtained from the corresponding plastisols. For the plastisols prepared with the nine phthalate plasticizers considered, we have studied and discussed the complex and extensional viscosities; the thermal behavior (DSC) including the decomposition of the chemical blowing agent, and the foam production by rotational molding. In addition, we have characterized the foams obtained by thermomechanical analysis, density, and bubble size distribution. As expected, clear correlations have been obtained between the molecular weight and structure of the plasticizer with the rheological behavior of the plastisols. The knowledge of the gelation and fusion processes and evolution of the extensional viscosity of the plastisols combined with the study of the thermal decomposition of the blowing agent in each plastisol allows for better understanding of the complex dynamic behavior of these foaming systems.

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Section: Introductionmentioning

confidence: 99%

Soft PVC foams: Study of the gelation, fusion, and foaming processes. I. Phthalate ester plasticizers

Zoller

Marcilla

2011

J of Applied Polymer Sci

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“…Polymer foams, which consist of a two-phase gas-solid system in which the solid polymer is continuous and the gaseous cells are dispersed throughout the solid, [1][2][3] have been recognized to exhibit excellent cushion and energyabsorbing properties, high thermal insulation, and low dielectric coefficient. They have been utilized in a wide range of applications, such as packaging, transportation, the automotive industry, and aerospace components, 4,5 while the common polymer foams, such as polystyrene foam, polyurethane foam, polyethylene foam, and polyvinyl chloride foam, have been limited by their low service temperatures and susceptibility to degradation.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of cyanate/epoxy foam

Fan

Tian

Chen

et al. 2015

High Performance Polymers

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A new type of cyanate (CE)/epoxy (EP) foam with bisphenol-A dicyanate ester prepolymer and diglycidyl ether of bisphenol-A (BADCy/DGEBA) has been successfully prepared through a two-step process. The structure and properties of CE/EP foam were studied. The results reveal that the CE/EP foams, with relatively uniform cell structure, were composed of closed cells as confirmed by scanning electron microscopy. The compressive strength increased from 0.507 MPa to 3.021 MPa, and the compressive modulus (E) increased from 15 MPa to 123 MPa as the density increased from 0.103 g cm À3 to 0.305 g cm À3. Dynamic mechanical analysis revealed that the CE/EP foams possessed a high glass transition temperature (T g ) (203 C) and that density had only a little impact on T g . Moreover, the excellent thermal stability presented with the onset of weight loss taken at 5% value was above 320 C, and the residual weight of the foam was more than 21.6% at 800 C. With increase in the density of CE/EP foams, the dielectric constants (") gradually decreased. For the foam with density of ¼ 0.162 g cm À3 , the value of " was as low as 2.28 at the frequency of 10 kHz.

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“…The last class of crosslinking is peroxide crosslinking, which has been investigated for PVC rigid, plasticized, and foam formulations [2,11,12]. Nevertheless, chemically crosslinked PVC is rarely used commercially because of some engineering problems regarding the processability of the polymer (high melt viscosity) [13].…”

Section: Introductionmentioning

confidence: 99%

Crosslinking of plasticized PVC used in coated fabrics

Ali

Esmaeili

Ghaeli

2009

Vinyl Additive Technology

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Crosslinking is effective in improving the properties of plasticized poly(vinyl chloride) (PPVC), such as mechanical, chemical, and thermal resistance. In this study, the crosslinking was carried out using di‐tert‐butyl peroxide as an initiator in the presence of 1,1,1‐trimethylolpropane trimethacrylate (TMPTMA) as a crosslinking agent at two different curing temperatures. The degree of crosslinking was measured in terms of gel content and tensile strength. Upon increasing the amount of peroxide to an optimum level, the gel content and tensile strength increased to a maximum point, and above this level, the peroxide caused a slight decrease in crosslinking, which was due to the scission of PPVC chains during thermal degradation. J. VINYL ADDIT. TECHNOL., 2009. © 2009 Society of Plastics Engineers

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Peroxide crosslinking of PVC foam formulations

Cited by 19 publications

References 6 publications

Soft PVC foams: Study of the gelation, fusion, and foaming processes. I. Phthalate ester plasticizers

Soft PVC foams: Study of the gelation, fusion, and foaming processes. I. Phthalate ester plasticizers

Preparation and characterization of cyanate/epoxy foam

Crosslinking of plasticized PVC used in coated fabrics

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