Influence of the type of resin in the gelation and fusion processes of PVC plastisols

García, J.C.; Marcilla, A.

doi:10.1016/s0032-3861(97)00297-8

Cited by 25 publications

(21 citation statements)

References 15 publications

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“…Accordingly, the final product obtained may have different mechanical and physical properties. The measurement of the viscoelastic properties of the polymer matrix by oscillatory tests has been widely used for studying such effects 10, 14–19…”

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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“…After mixing, the pastes were subjected to a vacuum process for 15 min with a maximum vacuum of −1 mbar in order to remove all air bubbles. Gelation and fusion processes were studied by analyzing viscoelastic properties, (under conditions similar to previous studies [14, 24] measuring complex viscosity by oscillatory tests between 40 and 180°C at a 5°C/min heating rate using 20 mm diameter parallel plates with a gap of 0.5 mm, oscillation frequency of 1 Hz and controlled deformation of 5 × 10 −3 , in a Bohlin CS 50 rheometer.…”

Section: Methodsmentioning

confidence: 99%

“…With increasing temperature, two other processes may occur to different extents: the decrease of viscosity of the already gelled phase, as well as the increase of the amount of gelled phase by the incorporation of more polymers from the core of the PVC particles. Those two processes may overlap to a varying degree resulting in different types of viscosity curves showing one maximum, a shoulder and one maximum, or even two separated maxima [10, 24]. According to the literature, several parameters, such as type of resin [24] type and concentration of the plasticizer [14] and the presence of the stabilizers and different additives [25] determine the evolution of the viscosity of the paste.…”

Section: Introductionmentioning

confidence: 99%

“…Those two processes may overlap to a varying degree resulting in different types of viscosity curves showing one maximum, a shoulder and one maximum, or even two separated maxima [10, 24]. According to the literature, several parameters, such as type of resin [24] type and concentration of the plasticizer [14] and the presence of the stabilizers and different additives [25] determine the evolution of the viscosity of the paste. Boudhani et al [26] also carried out oscillatory experiments at different temperatures and over a wide range of frequencies to investigate the gelation process and the sol–gel transition of various PVC plastisols.…”

Section: Introductionmentioning

confidence: 99%

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Rheometric study of the gelation and fusion processes of poly(vinyl chloride‐co‐vinyl acetate) plastisols with different commercial plasticizers

Zoller

Marcilla

2012

Vinyl Additive Technology

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Evolution of the complex viscosity of pastes of PVC‐VA (vinyl chloride‐vinyl acetate copolymer) plasticized with different commercial plasticizers has been studied. Knowledge of the rheological behavior of the formulations allows for better understanding of the gelation and fusion processes. Twenty commercial plasticizers of different types and with different functional groups have been studied and are grouped into five families: phthalate esters with linear chains, phthalate esters with branched chains, adipates (normal and polymeric), citrates, and rest of the plasticizers (carboxylates, alkylsulfonates, and pentaerythritol ester derivatives). Interesting relationships among the observed rheologies and the nature and molecular weight of the plasticizer have been observed. The evolution of the complex viscosity with temperature—at the temperatures where the blowing agents normally used in PVC plastisol foaming processes generate the main amount of gas—has been newly discussed with regard to the chemical structure and molecular weight of all of the plasticizers used. It was found that several different dynamic processes must be synchronized in order to understand the relationships among the chemical structure, plasticization, plasticizer compatibility, rheological properties, and foaming process of such materials. J. VINYL ADDIT. TECHNOL., 2012. © 2012 Society of Plastics Engineers

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“…At first, plasticizer enters inside some voids within the aggregates and subsequently initiates solvation/ swelling of some individual PVC particles to form a homogeneous structure (Semsarzadeh et al, 2002;Wang and Chen, 1991;Hong and Huang, 1999). Upon continuation of the heating process and by the time the T g of PVC is reached, the resin particles absorb the plasticizer to such a great extent that the plastisol becomes a solid paste (Boudhani et al, 2007;García and Marcilla, 1998;Kwak, 1995a;Marcilla and García, 1997a, 1997b mation of gel structure above the T g and disappearance of free plasticizer peak in the DSC calorimetric curves indicate total plasticizer absorption. It has been suggested that a small fraction of the present epoxy rings open upon reaction at labile hydrogen sites in the PVC to form an ether linkage with the chlorinated epoxy ( Fig.…”

Section: Influence Of Processing Temperature and Analysis Of Plasticimentioning

confidence: 99%

Epoxidized Esters of Palm Kernel Oil as an Effective Plasticizer for PVC: A Study of Mechanical Properties and Effect of Processing Conditions

Dutta

Das

Kundu

2014

International Polymer Processing

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One of the most commonly used vegetable oil plasticizer in polyvinyl chloride (PVC) is epoxidized soybean oil (ESBO). On the contrary, epoxidized palm oil is among the least used, because of its low compatibility with PVC. This work reports that epoxidized and esterified palm kernel oil (EEPKO) has the potential to be used as a plasticizer for PVC. In this study, it was found that a maximum of 65 phr of EEPKO could be incorporated within the PVC resin. In addition, subjecting this EEPKO plasticized PVC (p-PVC) at a processing temperature of 200 8C resulted in much reduced plasticizer loss. EEPKO lowers the glass transition temperature of PVC from 79 8Ct o -23 8C. The optimum mechanical properties, namely tensile strength, elongation at break and hardness, were obtained for p-PVC processed at 200 8C. REGULAR CONTRIBUTED ARTICLES Intern. Polymer Processing XXIX (2014) 4 Ó Carl Hanser Verlag, Munich 495

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Influence of the type of resin in the gelation and fusion processes of PVC plastisols

Cited by 25 publications

References 15 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

Rheometric study of the gelation and fusion processes of poly(vinyl chloride‐co‐vinyl acetate) plastisols with different commercial plasticizers

Epoxidized Esters of Palm Kernel Oil as an Effective Plasticizer for PVC: A Study of Mechanical Properties and Effect of Processing Conditions

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