Phase Diagram of Tapered Copolymers Based on Isoprene and Styrene

Galanos, Eftyxis; Wahlen, Christian; Butt, Hans-Juergen; Frey, Holger; Floudas, George

doi:10.1002/macp.202200033

Cited by 6 publications

(3 citation statements)

References 29 publications

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“…This molecular weight is low. Comparing the molecular weight of copolymers based on styrene obtained by radical polymerization [ 48 ], but using Mag-H + as a catalyst is still preferred for its many advantages such as very low purchase price compared to other catalysts and the easy removal of the reaction mixture.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Copolymers and Nanocomposites from Limonene, Styrene and Organomodified-Clay Using Ultrasonic Assisted Method

et al. 2022

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In the present work, we report a simple synthesis method for preparation of copolymers and nanocomposites from limonene and styrene using clay as a catalyst. The copolymerization reaction is carried out by using a proton exchanged clay as a catalyst called Mag-H+. The effect of temperature, reaction time and amount of catalyst were studied, and the obtained copolymer structure (lim-co-sty) is characterized by Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance spectroscopy (1H-NMR) and differential scanning calorimetry (DSC). The molecular weight of the obtained copolymer is determined by gel permeation chromatography (GPC) and is about 4500 g·mol−1. The (lim-co-sty/Mag 1%, 3%, 7% and 10% by weight of clay) nanocomposites were prepared through polymer/clay mixture in solution method using ultrasonic irradiation, in the presence of Mag-CTA+ as green nano-reinforcing filler. The Mag-CTA+ is organophilic silicate clay prepared through a direct exchange process, using cetyltrimethylammonuim bromide (CTAB). The prepared lim-co-sty/Mag nanocomposites have been extensively characterized by FT-IR spectroscopy, X-ray diffraction (XRD), scanning electronic microscopy (SEM) and transmission electronic microscopy (TEM). TEM analysis confirms the results obtained by XRD and clearly show that the obtained nanocomposites are partially exfoliated for the lower amount of clay (1% and 3% wt) and intercalated for higher amounts of clay (7% and 10% wt). Moreover, thermogravimetric analysis (TGA) indicated an enhancement of thermal stability of nanocomposites compared with the pure copolymer.

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Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Copolymers and Nanocomposites from Limonene, Styrene and Organomodified-Clay Using Ultrasonic Assisted Method

et al. 2022

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“…Among the SBC thermoplastic elastomer, SIS and corresponding composites have been applied in the industrial, such as adhesives, sealants, coatings, and photo actuators. In addition, due to its high flexibility, excellent biocompatibility, chemical resistance, and good impact, SIS has been used in medicine [6,7].…”

Section: Introductionmentioning

confidence: 99%

Effect of Carbon Nanoparticles Morphology on the Properties of Poly(styrene-b-isoprene-b-styrene) Elastomer Composites

Han,

Zhou,

Gao

et al. 2023

Polymers

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Though nanomaterials based on carbon have been widely used for the preparation of high-performance polymeric nanocomposites, there are few works focused on the effect of carbon nanoparticle morphology on the performance of corresponding polymer nanocomposites. Therefore, four representative carbon nanoparticles, including fullerene, carbon nanotubes, graphene, and carbon black incorporated poly(styrene-b-isoprene-b-styrene) (SIS) elastomer nanocomposites were fabricated using the solvent casting method. In addition, the effect of carbon nanoparticle morphology on the rheological, mechanical, electrical, and thermal properties of the obtained polymeric nanocomposites was systematically investigated. The results showed that the shape of carbon nanoparticles has a different effect on the properties of the obtained elastomer nanocomposites, which lays the foundation of carbon nanoparticle screening for high-performance polymer nanocomposite construction.

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“…Attempts have been made to suppress the crystallinity mainly by modifying the polymer architecture (e.g., grafted architecture, − tapered copolymers − ). Parenthetically, tapered copolymers combine nanostructured morphologies (double gyroid, cylindrical or perforated layers) favorable for Li-ion transport, with improved segmental mobility and excellent mechanical properties (toughness and strain at break exceeding 900%) as compared to their normal copolymers. − Moreover, the tendency for crystalline complex formation can be tuned by changing the lithium salt. The usual salts for this purpose are lithium bis (trifluoromethanesulfonyl)imide (LiTFSI) and lithium triflate (LiTf), with the former being superior, as it suppresses complex formation. ,,, …”

Section: Introductionmentioning

confidence: 99%

Grafted Copolymer Electrolytes Based on the Poly(acrylic acid-co-oligo ethylene glycol acrylate) (P(AA-co-OEGA)) Ion-Conducting and Mechanically Robust Block

Pipertzis

Kafetzi

Giaouzi

et al. 2022

ACS Appl. Polym. Mater.

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A series of completely amorphous polymer brushes composed of grafted copolymer electrolytes based on the ioncontaining block of poly(acrylic acid-co-oligo ethylene glycol acrylate) (P(AA-co-OEGA)) doped with LiCF 3 SO 3 (LiTf) or LiN(SO 2 CF 3 ) (LiTFSI) and the glassy polystyrene (PS) block are synthesized and studied with respect to the structural, thermomechanical, and ion conduction properties. The incorporation of some AA units into the ion-conducting phase provides a trade-off between increased mechanical stability and anion/cation complexation. Consequently, the P(AA-co-OEGA) block can be engineered to simultaneously support ion conduction while exhibiting enhanced mechanical stability. Between the two anions ([Tf − ] vs [TFSI − ]), it is the latter that better supports the Li-ion transport. Diblock copolymer electrolytes doped with the larger anion ([TFSI − ]) suppress ion complexation and give rise to superior ion conduction properties (by about 2 orders of magnitude), as compared to that of the smaller anion ([Tf − ]). Overall, the PS-b-P(AA-co-OEGA)/LiTFSI diblock-random copolymer electrolyte with salt concentration, r = 0.08 (r is defined as the molar ratio of Li ions to EO units), best combines the required mechanical stability (storage modulus, G′ ∼ 10 8 Pa) with a relatively high dc-conductivity (σ dc ∼ 10 −6 S•cm −1 ) at an ambient temperature (for application as solid polymer electrolytes (SPEs) in Li-ion batteries). This work suggests routes toward further improving the mechanical stability via the random incorporation of acids into the ion-containing block of nanophase-separated electrolytes.

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Phase Diagram of Tapered Copolymers Based on Isoprene and Styrene

Cited by 6 publications

References 29 publications

Synthesis and Characterization of Copolymers and Nanocomposites from Limonene, Styrene and Organomodified-Clay Using Ultrasonic Assisted Method

Synthesis and Characterization of Copolymers and Nanocomposites from Limonene, Styrene and Organomodified-Clay Using Ultrasonic Assisted Method

Effect of Carbon Nanoparticles Morphology on the Properties of Poly(styrene-b-isoprene-b-styrene) Elastomer Composites

Grafted Copolymer Electrolytes Based on the Poly(acrylic acid-co-oligo ethylene glycol acrylate) (P(AA-co-OEGA)) Ion-Conducting and Mechanically Robust Block

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