Effect of zinc stearate on the properties of a sulfonated polystyrene ionomer

Qiao, Xiuying; Wang, Xueyuan; Wang, Chao; Weiß, Robert

doi:10.1122/1.5017255

Cited by 8 publications

(7 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The effect of untreated and treated sps with (carbon black and Nano silica) on the stress-strain curves were shown in Figures (9,10), while the results indicates that the tensile strength and modulus was increase with increasing fillers while the elongation was decrease due to decrease the flexibility of the composites, this result was agreement with many research's [22,23]. On the other hand, the value of elongation of SPS-reinforced with carbon black was higher than SPS-reinforced with Nanosilica, as shown in Table .1 this may be due to sliding of carbon black which make somewhat flexibility of composite but still the value is less than the untreated SPS.…”

Section: Tensile Strength Testsupporting

confidence: 83%

Synthesis and properties of Sulphonated Polystyrene, Their New Composites and IPNs

Hanoosh

2021

basjs

View full text Add to dashboard Cite

Sulfonated polystyrene (SPS) is a polyelectrolyte solid that is widely used in many applications. In this study, the sulfonation reaction of food packages polystyrene (PS) waste was done using sulfuric acid as a sulfonation agent, with the variation of concentration and times. The degree of sulphonation was determined. Composite from SPS and two types of fillers (carbon black and Nano silica) were synthesized, and new IPNs between SPS and phenolic resin type novolac was prepared. The characterization of the sulfonated product and its IPNs have covered functional groups' analysis using FTIR spectrophotometers. On the other hand, tensile and modulus of the SPS composites were determined, and the results showed that the tensile strength and modulus was increase with increasing filler content ( 0.48 Map for SPS alone to 1.051 Map when the percentage of Nano silica 7% ) while the modulus was increase from 0.527 Map for SPS alone to 1.272 Map when the percentage of Nano silica 7% , The same results obtained in the case of carbon black as filler .Water absorption of the prepared thin films for SPS was more than PS alone due to the effect of the presence of polar sulphonic group in their polymer chains . Thermal behavior of SPS and their IPNs also studied and evaluated using TGA and DSC techniques; the results show that the decomposition temperature was more than 300 oC

show abstract

Section: Tensile Strength Testsupporting

confidence: 83%

Synthesis and properties of Sulphonated Polystyrene, Their New Composites and IPNs

Hanoosh

2021

basjs

View full text Add to dashboard Cite

show abstract

“…The physically reversible networks include many types depending on the species of physical interactions, including van der Waals interaction, − π–π stacking interaction, , hydrogen-bonding interaction, − ionic interaction, ,,− metal–ligand interaction, − and so on, whose energy levels are compared in Figure . In particular, the interaction energies of hydrogen bonds and ionic interactions are comparable to or 1 order higher than the thermal energy k B T in a temperature range from 20 to 300 °C (a usual temperature range where the polymer materials are applied or processed), with k B being the Boltzmann constant and T being the absolute temperature, enabling these interactions to be suitable for the formation of physically reversible networks.…”

Section: Introductionmentioning

confidence: 99%

Advances and New Opportunities in the Rheology of Physically and Chemically Reversible Polymers

Sheng

Chen

2021

Macromolecules

View full text Add to dashboard Cite

The advances in understanding the dynamics of both the physically and chemically reversible networks are summarized from a rheological perspective. The focus is placed on linear viscoelasticity, which is related to thermodynamics and reversible kinetics at quasi-equilibrium states. We first explain basic assumptions and predictions of the reversible-network theories, including the reversible gelation, sticky-Rouse, and sticky-reptation theories. We then summarize the dynamic features of the state-of-the-art materials that have not been fully incorporated into the current theoretical framework: (1) cooperative motion of the nearby stickers significantly increases the dissociation energy of physically reversible networks, (2) the degree of gelation becomes highly T-dependent when the Gibbs free energy approaches the thermal energy for both the physically and chemically reversible networks, and (3) the exchange rate of dynamic cross-links of chemically reversible networks is reaction-controlled and depends on the chemical species and concentrations of the reactants. Finally, some pathways for future theoretical development are suggested.

show abstract

“…The second heating curve of the DSC thermograms was applied for calculating melting properties of the samples. The degree of crystallinity (X C ) of the nanocomposites and the neat polymer specimens were computed using Equation :

X_{C} = ((), \frac{{∆ H}_{m}}{{∆ H}_{m_{°}}}) \times 100,

where

{∆ H}_{m_{°}}

is the melting enthalpy of 100% crystalline LDPE (293 J/g) and ∆H m is the melting enthalpy of the samples …”

Section: Methodsmentioning

confidence: 99%

“…The reason for choosing zinc stearates is its widespread use in the packaging industry. Over the recent years, the global consumption market has grown dramatically as zinc stearate is utilized in diverse range of applications for instance: lubricating agent, stabilizing agent, foam inhibitor, and acid scavenger …”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Evaluating the potential of nanoparticles for controlling zinc stearate release from low‐density polyethylene into food simulants

et al. 2019

View full text Add to dashboard Cite

The present study addressed the effect of polymer nanocomposites with different loading contents of fume silica (nanospheres) and nanoclay (nanosheet) on migration of zinc stearate from packaging materials into food simulants. Specific migration levels of zinc stearate from neat low-density polyethylene (LDPE) and LDPE/nanocomposites into two food simulants stored at 40°C for 10 days were determined by gas chromatography coupled with flame ionization detector. Differential scanning calorimetry (DSC) analysis showed that incorporation of nanoparticles, especially at 1 wt% loading level of nano silica, noticeably increased degree of crystallinity, which significantly reduced water vapour permeability. Nanocomposites had a lower migration of zinc stearate in comparison with neat polymer. Additionally, results of this study revealed that physical properties of the food simulant had dominant effect on migration of zinc stearate.

show abstract

Effect of zinc stearate on the properties of a sulfonated polystyrene ionomer

Cited by 8 publications

References 50 publications

Synthesis and properties of Sulphonated Polystyrene, Their New Composites and IPNs

Synthesis and properties of Sulphonated Polystyrene, Their New Composites and IPNs

Advances and New Opportunities in the Rheology of Physically and Chemically Reversible Polymers

Evaluating the potential of nanoparticles for controlling zinc stearate release from low‐density polyethylene into food simulants

Contact Info

Product

Resources

About