Optimization of fusion behavior of the nanocomposites based on poly(vinyl chloride)/poly(epichlorohydrin‐co‐ethylene oxide)/organoclay

Moghri, Mehdi; Seifi, Leila; Zanjanijam, Ali Reza; Ramezani, Maryam

doi:10.1002/vnl.21632

Cited by 2 publications

(2 citation statements)

References 28 publications

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“…In our previous work, we used Poly(epichlorohydrin-co-ethylene oxide) (ECO) as an electrostatically dissipative compound to see its effect on fusion behavior of (PVC/ECO)/organoclay nanocomposites. 18 The results of our study, based on response surface method (RSM) showed that low levels of the ECO content, and low or medium levels of OMMT and rotor speed are the optimum conditions for lower fusion time (FT) and higher fusion factor (FF). In continuation of our previous work, herein, we are going to investigate the effect of ECO, OMMT, and rotor speed parameters on thermal stability of (PVC/ ECO)/OMMT nanocomposite.…”

Section: Introductionmentioning

confidence: 84%

The effect of formulation and processing parameters on thermal stability of PVC/Poly(epichlorohydrin-co-ethylene oxide)/organoclay nanocomposites prepared by melt mixing

Moghri

Kalaee

Abdouss

et al. 2022

Journal of Thermoplastic Composite Materials

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In this work, nanocomposites of polyvinyl chloride poly(epichlorohydrin-co-ethylene oxide)(ECO)/organoclay were prepared via melt processing and various parameters including nanoclay and rubber content (ECO) as well as rotor speed were tuned to find the optimum formulation for the highest thermal stability. The prepared products were characterized by X-ray diffraction as well as thermogravimetric analysis (TGA), derivative thermogravimetric (DTG) and differential thermal analysis XRD results showed that rotor speeds higher than 70 r/min are crucial for obtaining highly intercalated products with good thermal stability. From DTG analyses, it was observed that at lower concentrations of rubber, the rate of mass loss is higher which results in faster dehydrochlorination of the composite. The sample prepared with 2 phr OMMT, 30 phr rubber, and 70 r/min rotor speed showed the highest thermal stability. The selected nanocomposite showed the first weight loss at 294 [Formula: see text]. Results of this research showed that even a slight change in each parameter has a great influence on thermal properties of the nanocomposites. The hydrogen bonding mode between ECO and organoclay were estimated by theoretical calculations using GAUSSIAN software. From the obtained results, the miscibility of OMMT and ECO polymer is related to the hydrogen bonds which are more preferred at chlorine atom of ECO polymer.

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Section: Introductionmentioning

confidence: 84%

The effect of formulation and processing parameters on thermal stability of PVC/Poly(epichlorohydrin-co-ethylene oxide)/organoclay nanocomposites prepared by melt mixing

Moghri

Kalaee

Abdouss

et al. 2022

Journal of Thermoplastic Composite Materials

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“…Poly(epichlorohydrin‐co‐ethylene oxide) and nano clay, Closite 30B delayed fusion and decreased fusion factor, however, fusion behavior can be tweaked by choosing optimum rotor speed. [ 14 ] Other factors affecting fusion includes temperature and lubricants in formulations. Increased temperature and decreased lubricant level increased probability of fusion.…”

Section: Introductionmentioning

confidence: 99%

In‐depth rheological study of acrylic processing aids in rigid polyvinyl chloride applications

Nerkar

2023

Vinyl Additive Technology

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Acrylic processing aids are used widely in rigid polyvinyl chloride (PVC) applications. Key functions of processing aids in terms of processing and performance are discussed in the paper. Effect of molecular weight of acrylic processing aids on their functions are studied. Additionally, effect of processing conditions, such as temperature and shear on fusion characteristics of PVC formulations are investigated. Shear rate in the processing was varied by means of rotor speed in torque rheometer. Processing aids of comprehensive molecular weight range are evaluated in the study. It was observed that relatively lower molecular weight processing aids have different response to change in shear and temperature than higher molecular weight processing aids. Depending upon fusion conditions PVC formulations can yield either a single or double fusion peak. Generally, it was considered that ultra‐high molecular weight processing aids yield a double fusion peak, however, it was demonstrated in the studies that it is not true. Fusion conditions, temperature, and shear are the main driving forces of fusion dynamics, resulting in either a single or double fusion peak. Relatively low molecular weight acrylic processing aids can also yield double fusion peak. Melt viscosity and shear thinning properties are also examined. Relatively lower molecular weight processing aids showed higher shear thinning behavior. Effect of temperature and shear on degree of fusion was studied. It was shown that optimum processing parameters can increase the degree of fusion by ~10%.

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Optimization of fusion behavior of the nanocomposites based on poly(vinyl chloride)/poly(epichlorohydrin‐co‐ethylene oxide)/organoclay

Cited by 2 publications

References 28 publications

The effect of formulation and processing parameters on thermal stability of PVC/Poly(epichlorohydrin-co-ethylene oxide)/organoclay nanocomposites prepared by melt mixing

The effect of formulation and processing parameters on thermal stability of PVC/Poly(epichlorohydrin-co-ethylene oxide)/organoclay nanocomposites prepared by melt mixing

In‐depth rheological study of acrylic processing aids in rigid polyvinyl chloride applications

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