Investigations on the intrinsic viscosity of poly(vinyl chloride)(PVC) affected by polymer–polymer interactions in solution

Yang, Haiyang; Zhu, Pingping; Li, Guofeng; Peng, Wu; Ren, Feng

doi:10.1016/s0014-3057(98)00125-6

Cited by 20 publications

(4 citation statements)

References 15 publications

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“…The PVC/PS mixture analyzed with the Krigbaum and Wall10 (partially miscible), Garcia et al11 (miscible), Chee15 (partially miscible), and Zhu16 (partially miscible) showed conflicting results with the results obtained by the Pan et al12 and Jiang and Han17 criteria and the RI and FTIR measurements, where the PVC/PS mixture was considered to be a immiscible mixture. PVC/PS was previously determined to be an immiscible mixture on the basis of its repulsive and attractive polymer–polymer interactions in dilute solutions 7, 26. However, this study showed that the interactions between PVC, PS, and the solvent and considerations about the ideal parameters of the mixture in dilute solutions played an important role in the conflicting results presented by the criteria analyzed in this study.…”

Section: Resultsmentioning

confidence: 72%

Investigation of poly(vinyl chloride)/polystyrene mixture miscibility: Comparison of viscometry criteria with Fourier transform infrared spectroscopy and refractive index measurements

Aquino

Silva

Araújo

2010

J of Applied Polymer Sci

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The refractive index (RI) and Fourier transform infrared (FTIR) spectrum of a poly(vinyl chloride) (PVC)/polystyrene (PS) mixture were measured. The variation of RI with the mixture composition was found to be nonlinear, which indicated the immiscibility of the PVC/ PS mixture. This result agrees with results obtained by the FTIR technique, which indicated negligible intermolecular interactions between the PVC/PS components, and the miscibility of the polymer mixture was limited for the compositions studied. The results obtained by RI and FTIR were compared with the results obtained by the viscosity method with criteria based on interaction parameters proposed by Krigbaum and Wall, Chee, Zhu, and Garcia et al. and the thermodynamic parameter proposed by Jiang and Han. A criterion based on a simple cluster theory proposed by Pan et al. was also applied to the PVC/PS mixture solutions to study the polymer-polymer interactions. The conclusions about PVC/PS immiscibility made by Pan et al. and Jiang and Han agreed with our conclusions obtained by FTIR and RI measurements. On the other hand, the results obtained by Chee, Zhu, and Krigbaum and Wall showed partial miscibility of the PVC/PS mixture, whereas the polymer mixture was miscible according to the Garcia et al. criterion.

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Section: Resultsmentioning

confidence: 72%

Investigation of poly(vinyl chloride)/polystyrene mixture miscibility: Comparison of viscometry criteria with Fourier transform infrared spectroscopy and refractive index measurements

Aquino

Silva

Araújo

2010

J of Applied Polymer Sci

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“…Almost no deviations between [η] exp and [η] calc from the law of additivity exist before Φ DCE ≤ 0.4, and the deviations between [η] exp and [η] calc , Δ[η] = [η] exp − [η] calc , increase with increasing Φ DCE . Generally speaking, no strong interaction between two molecules exists if the additivity law holds,11 and oppositely, compact or globular complex particles formed are considered if Δ[η] < 012–17 or expanding coils attributed to strong interaction are formed if Δ[η] > 0 18–21. Therefore, the interaction between EVA 38 and wax is nearly equivalent to zero when Φ DCE ≤ 0.4, and increases with increasing Φ DCE when Φ DCE > 0.4.…”

Section: Resultsmentioning

confidence: 99%

Studies on pour point depression of EVA polymers in solvent mixtures containing wax

Qian¹,

Zhou²,

Yang³

et al. 2001

J of Applied Polymer Sci

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ABSTRACT:Measurements of the change of the pour point depression (⌬T PP ) were performed for the wax solutions made of four solvent mixtures: ethyl acetate/hexane (EA/HEX), 1,2-dichloroethane/cyclohexane (DCE/CYH), butanone/heptane (MEK/ HEP), and acetone/chloroform (AC/CF) doped with EVA polymers. The values of ⌬T PP increase significantly with increasing of the selective solvent EA, DCE, MEK, and AC components, for the vinyl acetate (VA) segment in EVA copolymers, in the solvent mixtures. The solvent effect of ⌬T PP occurring in wax solutions can also come from the solutions of EVA polymer, which were prepared by solvent mixtures with various compositions and used as parent solutions of EVA pour point depressant. From the experimental results such as the NMR of EVA macromolecules; viscosities of EVA, waxes, and their blends; and solubilities of wax with and without EVA macromolecules in the solvent mixtures, the complexation between wax molecules and ordered ethylene segment, and wax solubilization within ordered ethylene segments in EVA macromolecules are suggested for qualitative description of the observed significant variation of ⌬T PP .

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“…Moderate agitation needed to maintain emulsion. Heat transfer can be more efficient due to liquid phase [60]. Offers versatility for a wide range of monomers, such as latex production for paints, though it demands surfactants and careful pH control [61].…”

Section: Suspension Emulsion Intrinsic (Bulk)mentioning

confidence: 99%

Bibliometric and Co-Occurrence Study of Process System Engineering (PSE) Applied to the Polyvinyl Chloride (PVC) Production

González-Delgado,

Ramos-Olmos,

Pájaro-Gómez

2023

Materials

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PVC is widely used in packaging, electrical insulation, and medical devices due to its versatility owing to its resistance, incombustible and barrier properties as well as affordable cost. In the present study, bibliometric and co-occurrence analyses are proposed to identify trends, gaps, future directions, and challenges regarding process system engineering (PSE) applied to the production process of PVC using VOSviewer as a tool for analyzing the data obtained from SCOPUS. A mapping of different topics alluding to simulation of PVC production was provided to gain a better insight into the development of the topic and its progression. The findings indicate that the literature on this topic falls into five different clusters: modeling and simulation of PVC production, process control and optimization, and optimization strategies of the process. From a co-occurrence study we identified that mathematics and statistics applied to polymer chemistry, separation phenomena, and polymer production are the main areas of interest for further research. The trends suggest that Monte Carlo and numerical simulation can contribute to a deeper understanding of PVC’s properties and behavior. In addition, the focus on plastics and microplastics reflects concerns about the environmental impact. A bibliometric study evidenced that PSE provides the tools for improvement in PVC production processes by employing advanced process engineering techniques. Modelling and new algorithms for simulation methods of continuous polymerization processes are important to enhance accuracy and efficiency across various applications. The study also proposes a research agenda for future researchers working in the field of the use of PSE applied to the PVC production process.

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Investigations on the intrinsic viscosity of poly(vinyl chloride)(PVC) affected by polymer–polymer interactions in solution

Cited by 20 publications

References 15 publications

Investigation of poly(vinyl chloride)/polystyrene mixture miscibility: Comparison of viscometry criteria with Fourier transform infrared spectroscopy and refractive index measurements

Investigation of poly(vinyl chloride)/polystyrene mixture miscibility: Comparison of viscometry criteria with Fourier transform infrared spectroscopy and refractive index measurements

Studies on pour point depression of EVA polymers in solvent mixtures containing wax

Bibliometric and Co-Occurrence Study of Process System Engineering (PSE) Applied to the Polyvinyl Chloride (PVC) Production

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