Compatibility of poly(ethylene oxide)/poly(vinyl chloride) blends by differential scanning calorimetry

Katime, Issa; Anasagasti, M.; Peleteiro, María C.; Valenciano, R.

doi:10.1016/0014-3057(87)90067-x

Cited by 31 publications

(13 citation statements)

References 8 publications

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“…[7] and Katime et al [8] and it has been found that no decrease in growth rate (G' = dR/dt, with R denoting the radius of the spherulite) with time was observed until the impingement with other growing spherulites.…”

Section: Resultsmentioning

confidence: 99%

Differential scanning calorimetry studies on poly(ethylene glycol) with different molecular weights for thermal energy storage materials

Pielichowski¹,

Flejtuch²

2002

Polymers for Advanced Techs

273

186

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Melting and crystallization behaviour of poly(ethylene glycol) (PEG) with different molecular weights (from 1000 to 35 000) and chosen blends of PEG is investigated by means of differential scanning calorimetry (DSC) operating in dynamic mode at different heating rates. The influence of the molecular weight of PEG on its melting point and enthalpy of fusion is evaluated; from the DSC data the degree of crystallinity is calculated–it is found that there is an increased tendency of higher‐molecular‐weight PEGs towards the formation of crystalline phase owing to their lower segmental mobility and more convenient geometrical alignment. During the freezing cycle, an increase in the molecular weight of PEG causes an increase in the solidification temperature and heat of crystallization. Thermal transition data are supplemented by optical microscopy–numerous small sphere‐shaped crystalline structures are observed to join together and impinge on their neighbours, forming eventually a multilayered lamellar texture. By implementing second polymeric component the polydispersity of the system increases, thus lowering the crystallization degree during preparation phase. It influences also the course of solidification by lowering the crystallization temperature, Tc. An additional effect observed in the case of the blend's freezing is associated with larger supercooling, probably due to morphological constraints and entanglements in interlamellar regions. The possible advantage of using PEG blends to replace pure components is connected with the possibility of changing the temperature range and heat associated with melting/freezing. Copyright © 2003 John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 99%

Differential scanning calorimetry studies on poly(ethylene glycol) with different molecular weights for thermal energy storage materials

Pielichowski¹,

Flejtuch²

2002

Polymers for Advanced Techs

273

186

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“…One of the major drawbacks for UPs is their brittleness are blends containing two amorphous components. There are also many investigations conand poor resistance to crack propagation, 12 which has confined the application of UPs to situations cerned with amorphous/crystallizable polymer blends, 4,5 but the polymer blends containing one where the stress is relatively low and preferably static. Although the technique of blending has crystallizable component and a thermosetting solved many practical problems in polymer scicomponent receive little attention.…”

Section: Introductionmentioning

confidence: 99%

Thermosetting polymer blends of unsaturated polyester resin and poly(ethylene oxide). I. Miscibility and thermal properties

Zheng

Guo

1997

J. Polym. Sci. A Polym. Chem.

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“…This blending mixture is of the homogeneous type, and the miscibility of the blending mixture results from a compatibility between PVC and PEO, via hydrogen bond formation between the a-hydrogen atoms in the weak proton-donating PVC with the proton-accepting ether oxygen in PEO [10][11][12][13]. A symmetry diagram of the formation of hydrogen bonds between PVC and PEO is shown in Figure 11.1.…”

Section: System 1: Pvc/peo Blendsmentioning

confidence: 99%

Thermal Analysis in Polymer Blends

Subramaniam

Rajantharan

2014

Characterization of Polymer Blends

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Polymer blending is a technique of interest that has captured the attention of numerous research groups since the twentieth century to the present day. Pioneering studies in the development of high-performance polymer electrolytes has mainly been focused on the use of single types of preformed polymers, such as poly(ethylene oxide) (PEO), poly(methyl methacrylate) (PMMA), and poly(vinyl chloride) (PVC). However, as the properties of the homopolymer-based electrolytes were unable to support the applications of high-conducting electronic devices in many ways, an alternative approach was sought which involved the blending of two or more preformed polymers of different natures to form an ionic conducting matrix [1,2].During subsequent years, the conducting matrix underwent development by employing copolymers synthesized from mixtures of monomers, and consequently the formulation of brand new polymers via the polymerization process captured the attention of many research groups. Unfortunately, however, most synthetic efforts cannot guarantee the creation of polymers that will meet the entire needs of research groups in terms of electrical, structural, mechanical, and thermal properties.The polymerization process is not straightforward, and cannot be easily be performed without a full knowledge of the field of polymer synthesis. Indeed, a large number of contributing factors must be considered before attempting to synthesize copolymers, that include: (i) the type of monomers and compositions to be used; (ii) selection of the medium; (iii) the temperature of the synthesizing process; and (iv) the time required for synthesis to be completed. The problem persists however that, although excellent formulations can be prepared by optimizing the conditions of synthesis, the synthesized polymers may not possess all of the desired properties.Thus, the technique of polymer blending has been developed as a more convincing and practicable method to create high-performance polymer electrolytes membrane with known properties. Moreover, the polymer blends will possess

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Compatibility of poly(ethylene oxide)/poly(vinyl chloride) blends by differential scanning calorimetry

Cited by 31 publications

References 8 publications

Differential scanning calorimetry studies on poly(ethylene glycol) with different molecular weights for thermal energy storage materials

Differential scanning calorimetry studies on poly(ethylene glycol) with different molecular weights for thermal energy storage materials

Thermosetting polymer blends of unsaturated polyester resin and poly(ethylene oxide). I. Miscibility and thermal properties

Thermal Analysis in Polymer Blends

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