Linear polymers with sulfur in the main chain. IV. Synthesis of thermotropic liquid‐crystalline polythioesters based on 4,4′‐biphenyldithiol with excellent adhesive properties

Honda, Hiroshi; Kadota, Joji; Agari, Yasuyuki; Harada, Toshihiko; Tanaka, Mitsuaki; Hasegawa, Kiichi

doi:10.1002/pen.20702

Cited by 27 publications

(14 citation statements)

References 24 publications

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“…Such materials can be attractive for numerous medical applications like blood tubing, catheters, cannulae, pacemakers, neurostimulators and orthopedic nail encapsulation (Resiak and Rokicki 2000 ; Choi et al 2011 ), as well as for optical applications like ophthalmic lenses, fiber optics and non-linear optics, and so on (Jha et al 2008 ). They can also be used as interlayers or inner layers for automobile laminated windscreens (Hepburn 1992 ) and printed wiring boards (Hirano et al 2007 ).…”

Section: Introductionmentioning

confidence: 99%

New thermoplastic poly(carbonate-urethane)s based on chain extenders with sulfur atoms

2016

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New thermoplastic segmented polyurethanes were obtained by a one-step melt polyaddition using 40, 50 and 60 mol% poly(hexane-1,6-diyl carbonate) diol of g mol−1, 1,1′-methanediylbis(4-isocyanatobenzene) and 2,2′-[sulfanediylbis(benzene-1,4-diyloxy)]diethanol, 2,2′-[oxybis(benzene-1,4-diylsulfanediyl)]diethanol or 2,2′-[sulfanediylbis(benzene-1,4-diylsulfanediyl)]diethanol as a chain extender. FTIR, atomic force microscopy, differential scanning calorimetry and thermogravimetry were used to examine the polyurethanes’ structure and thermal properties. Moreover, their Shore A/D hardness, tensile, adhesive and optical attributes were determined. They were transparent high-molar-mass materials showing good tensile strength (up to 51.9 MPa). The polyurethanes exhibited improved adhesion to copper taking into consideration that of conventional ones, and middle or high refractive index values (1.57–1.60), and both these parameters increased with an increase of the content of sulfur atoms in the polyurethane chain. The newly obtained polyurethanes can be considered as materials for numerous medical and optical appliances.

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Section: Introductionmentioning

confidence: 99%

New thermoplastic poly(carbonate-urethane)s based on chain extenders with sulfur atoms

2016

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“…Moreover, polythioesters have significantly higher adhesion to copper. With thermotropic liquid crystalline polymers (TLCPs), superior bonding strength to metals such as copper and gold, the new applications, such as recyclable printed wiring boards based on TLCPs, will be developed (346).…”

Section: Poly(thioester)smentioning

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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“…Many TLCPs contain a completely aromatic backbone, which maximizes their thermo-mechanical properties [13,14]. The mesogenic structures are mainly synthesized from terephthalic acid (TPA), 2,6-naphthalene-dicarboxylic acid, p -hydroxybenzoic acid ( p -HBA), hydroquinone (HQ), 2,6-naphthalene diol (Naph), and p , p ′-biphenol in their unsubstituted or substituted forms [11,13,14,15,16]. However, rigid rod-type TLCPs often have very high melting points, which make their processing difficult.…”

Section: Introductionmentioning

confidence: 99%

Thermotropic Liquid Crystalline Polymers with Various Alkoxy Side Groups: Thermal Properties and Molecular Dynamics

2019

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Two series of thermotropic liquid-crystalline polymers (TLCPs) were synthesized by reacting various dialkoxy terephthalate units with hydroquinone (HQ) and 2,6-naphthalene diol (Naph). The dialkoxy terephthalate moieties used in this study include 2,5-diethoxyterephthalate, 2,5-dibutoxyterephthalate, and 2,5-dihexyloxy-terephthalate. All the TLCPs synthesized in this study formed nematic phases. The molecular motions according to the length of the dialkoxy side groups in the TLCPs were evaluated by 13C cross-polarization/magic angle spinning nuclear magnetic resonance spectroscopy. The thermal properties and molecular dynamics of the TLCPs are found to be affected by the length of the dialkoxy side group and the aromatic diol unit in the main chain. Further, the thermal behaviors, liquid crystalline mesophases, and degree of crystallinity of the two series of TLCPs, i.e., HQ- and Naph-TLCPs, are compared.

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Linear polymers with sulfur in the main chain. IV. Synthesis of thermotropic liquid‐crystalline polythioesters based on 4,4′‐biphenyldithiol with excellent adhesive properties

Cited by 27 publications

References 24 publications

New thermoplastic poly(carbonate-urethane)s based on chain extenders with sulfur atoms

New thermoplastic poly(carbonate-urethane)s based on chain extenders with sulfur atoms

Sulfur‐Containing Polymers

Thermotropic Liquid Crystalline Polymers with Various Alkoxy Side Groups: Thermal Properties and Molecular Dynamics

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