Acoustic properties of poly(4,4′-cyclohexylidene-R-R′-diphenylene-3-3′-benzophenone disulfonates) at 30 °C

Shah, Abhishek; Parsania, P. H.

doi:10.1016/s0014-3057(96)00265-0

Cited by 10 publications

(8 citation statements)

References 6 publications

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“…DSC thermogram showed glass transition temperature (T g ) at about 170 C. From Figure 6, it is evident that PESAC is thermally stable up to about 290 C and followed single-step degradation involving about 46.7% weight loss over the temperature range from 290-406 C leaving 43.7% residue above 450 C. The maximum weight loss is observed at about 341.2 C. The Tg and thermal stability of PESAC are comparable with other cardo polysulfonates and copolysulfonates of the same type (T g 120-226 C and thermal stability 340-373 C) [7,19,21,[25][26][27][28][29] .…”

Section: Thermal Analysismentioning

confidence: 99%

Synthesis and Physicochemical Study of High-Performance Ether-Sulfonate Copolymer

Matariya

Parsania

2011

Polymer-Plastics Technology and Engineering

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Ether-sulfonate copolymer of 1,1 0 -bis(4-hydroxyphenyl) cyclohexane, bisphenol-A and 4,4 0 -disulfonyl chloride diphenyl ether [PESAC] has been synthesized and characterized by IR, 1 H NMR, viscosity ([g] ¼ 0.23-0.25 gdl À1 ), density (1.3172 g/cm 3 ), tensile strength (11.8 MPa), electric strength (64 kV/mm), volume resistivity (4.24 Â 10 14 X cm) and dielectric constant (1.0). PESAC possesses excellent solubility, good hydrolytic stability against water, acids, alkalis and salt, high T g (170 C) and high thermal stability (290 C). The associated kinetic parameters namely energy of activation E (386.6 kJ mol À1 ), order of the reaction n (3.1), frequency factor A (1.53 Â 10 31 s À1 ) and entropy change DS Ã (346.1 kJ mol À1 ) have been determined and discussed.

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Section: Thermal Analysismentioning

confidence: 99%

Synthesis and Physicochemical Study of High-Performance Ether-Sulfonate Copolymer

Matariya

Parsania

2011

Polymer-Plastics Technology and Engineering

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“…More recently, similar polysulfonates based on 4,4 -cyclohexane-1,1diyldiphenol and its derivatives [e.g., (61) and (62) as well as chloro-and bromoderivatives (249,250), prepared by conventional interfacial polycondensation, using water-chloroform as an interface, alkali as an acid acceptor, and cetyltrimethylammonium bromide as an emulsifier, have been thoroughly studied (249)(250)(251)(252)(253)(254)(255)(256)(257)(258)(259)(260)(261)(262)(263). In general, the polymers possess good solubility in common solvents, good acid and alkali resistance, thermal stabilities of up to 370 • C, and tensile strength of up to ∼20 MPa (255).…”

Section: Poly(sulfonic Acid)s and Their Derivativesmentioning

confidence: 99%

Sulfur‐Containing Polymers

Kultys

2010

Encyclopedia of Polymer Science and Technology

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Sulfur-containing polymers, when considering their structure, make up a complex group of macromolecular compounds of varied and often remarkable features that determine their versatile applications.The presence of sulfur atoms in polymer structure, depending on the kind of functional group, can improve some important properties, such as mechanical, electrical, and optical, and then adhesion to metals, resistance to heat, chemicals, radiation, and bacteria, biocompatibility, and so on. These are their more important functional groups: sulfide -S-, polysulfide -S n -, sulfonyl -SO 2 -, sulfinyl -SO-, sulfo -SO 3 H, as well as some organic groups containing sulfur atoms, such as thioester -Sulfur-containing polymers can be used as high performance engineering plastics, chemically stable ion-exchange membranes in electromembrane processes, proton-conducting electrolytes, as well as optical, optoelectronic, and photochemical materials. Some polymers are employed in biomedical applications, for example, sulfopolymers as biomembranes and blood-compatible materials, and polysulfates and polysulfonates as antithrombotic or antiviral agents. The presence of sulfur, particularly in the form of disulfide bridges, plays an important role in biopolymers.The purpose of this review is mainly to present recent advances in the area of sulfur-containing polymers that may not yet have commercial applications. Nevertheless, older but still significant material has been included at the beginning of the discussion of each class. Poly(monosulfide)sPolymers containing a monosulfide linkage in both the main chain and the pendent group are the subject of many detailed studies. A few reviews of the synthesis and properties of all types of polymers have been published (1-4); like the one covering polymer with sulfur in the main chain that appeared in 1992 (3). Polysulfides with controlled and well-defined structures can be easily prepared. Nevertheless, the only commercial poly(monosulfide) is Ryton [Philips Petroleum Co., poly(thio-1,4-phenylene) more frequently referred to as poly(p-phenylene sulfide) or poly(phenylene sulfide) (PPS)].

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“…More recently, similar polysulfonates, eg, (61) and (62), prepared by conventional interfacial condensation using water-chloroform as an interface, alkali as an acid acceptor, and cetyltrimethylammonium bromide [57-09-0] as an emulsifier have thoroughly been studied (195)(196)(197)(198)(199)(200)(201)(202)(203)(204)(205)(206). In general, the polymers possess good solubility in common solvents, good acid and alkali resistance, thermal stabilities of up to 355 • C, and tensile strength of up to ∼20 MPa (199).…”

Section: Sulfur-containing Polymersmentioning

confidence: 99%

“…4 200). Acoustic (ultrasonic) studies of these polysulfonates have been performed in chlorinated and aprotic solvents in order to understand their structures as well as polymer-solvent and polymer-polymer interactions (202)(203)(204)(205)(206).…”

Section: Sulfur-containing Polymersmentioning

confidence: 99%

Sulfur‐Containing Polymers

Kultys¹

2001

Encyclopedia of Polymer Science and Technology

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Vol. 4 SULFUR-CONTAINING POLYMERS 337Nevertheless, the only commercial poly(monosulfide) is Ryton [Philips Petroleum Co., poly(thio-1,4-phenylene) more frequently referred to as poly(p-phenylene sulfide) or poly(phenylene sulfide) (PPS)]. Much effort has been devoted to preparing aromatic compounds in view of their significance as reactive intermediates for the synthesis of high performance linear aromatic polymers by ring-opening polymerization (ROP) (5). In an attempt to develop a novel synthetic method for the preparation of high molecular weight poly(thioarylene)s, macrocyclic aromatic sulfides and disulfides have been intensively prepared (6-14). The coordination chemistry of macrocyclic polysulfides has also received considerable attention during the past years. The thiacrown ether polymer ligands can be used as ion-exchange resins, metal ion adsorbents, and polymeric phase-transfer catalysts (15,16). Molecular systems in which tetrathiafulvalene is incorporated into macrocycles with supplementary donor atoms are potential electroactive cation sensors (17). The π -conjugated polymers have been extensively studied because of their attractive electronic properties. SULFUR-CONTAINING POLYMERSVol. 4The novel partially crystalline polymer (3) with number-average molecular weight (M n ) of up to 5700 was prepared under various conditions by catalyzed self-condensation of 3-hydroxypropyl methoxycarbonylethyl sulfide (4) or 3-hydroxypropyl carboxyethyl sulfide (5) (22). The degree of crystallinity, melting temperature (T m ), T g , and temperature of initial decomposition (T d ) were 36-46%, 37-47 • C, −61 to −70 • C, and 164-260 • C, respectively. The monomers (4) and (5) were prepared by an addition of methyl 3-mercaptopropionate and 3-mercaptopropionic acid with allyl alcohol [107-18-6] catalyzed by AIBN [2,2 -azobis(2-methylpropionitrile), azobisisobutyronitrile, azodiisobutyrodinitrile, 2,2 -azobis(2-methylpropanenitrile), α,α -azodiisobutyronitrile, 2,2 -azobis(isobutyronitrile), 2,2 -dicyano-2,2 -azopropane, Porofor-57, 2,2 -dimethyl-2,2azodipropionitrile, 2,2(-azobis(2-methylpropionitrile))] [78-67-1].An addition of conjugate 1,4-benzenedithiol (A) to 1,4-divinylbenzene (1,4diethenylbenzene, p-divinylbenzene) (B) [105-06-6] was investigated in detail in the presence of the AIBN initiator in toluene at 75 • C (23). It was found that the polymerization proceeded without an induction period, to give a white polymer with a high molecular weight [weight-average molecular weight (M w ) = 110,000] in ∼90% yield for 2 h. In addition, it was confirmed by 1 H nmr, ir, and the sulfur contents that the polymer had an alternating structure of A and B units.The synthesis and radical addition behavior of optically active cysteinebased monomers with mercapto and olefin groups have also been studied (24). N-4-vinylbenzoyl-L-cysteine methyl ester polymerized satisfactorily to afford the corresponding polysulfide (with M n in the range of 7000-23,000) in good yields.A novel one-pot synthesis of sulfur-containing polymers incl...

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Acoustic properties of poly(4,4′-cyclohexylidene-R-R′-diphenylene-3-3′-benzophenone disulfonates) at 30 °C

Cited by 10 publications

References 6 publications

Synthesis and Physicochemical Study of High-Performance Ether-Sulfonate Copolymer

Synthesis and Physicochemical Study of High-Performance Ether-Sulfonate Copolymer

Sulfur‐Containing Polymers

Sulfur‐Containing Polymers

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