Synthesis and characterization of semicrystalline triblockcopolymers of isotactic polystyrene and polydimethylsiloxane

Gall, Barbara T.; Thomann, Ralf; Mülhaupt, Rolf

doi:10.1002/pola.24658

Cited by 9 publications

(9 citation statements)

References 20 publications

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“…However, their plasticizing temperatures were relatively low and could not meet the requirement for practical utilization. In addition, in thermoplastic silicone elastomers based on H-bonding or triblock copolymers 50 , 51 , melting temperatures could reach above 170 °C, but they may not have good solvent resistance at high temperature.…”

Section: Introductionmentioning

confidence: 99%

Recyclable Polydimethylsiloxane Network Crosslinked by Dynamic Transesterification Reaction

Zhang

Cai

Liu

et al. 2017

Sci Rep

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This article reports preparation of a crosslinked polydimethylsiloxane (PDMS) network via dynamic transesterification reaction between PDMS-diglycidyl ether and pripol 1017 with Zn(OAc)2 as the catalyst. The thermal dynamic nature of the network was investigated by the creep-recovery and stress-relaxation tests. The synthesized PDMS elastomer showed excellent solvent resistance even under high temperature, and could be reprocessed by hot pressing at 180 °C with the mechanical properties maintained after 10 cycles. Application of the PDMS elastomer in constructing micro-patterned stamps repeatedly has been demonstrated. The high plastic temperature and good solvent resistance distinguish the research from other reported thermoplastic PDMS elastomers and broaden the practical application areas.

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Section: Introductionmentioning

confidence: 99%

Recyclable Polydimethylsiloxane Network Crosslinked by Dynamic Transesterification Reaction

Zhang

Cai

Liu

et al. 2017

Sci Rep

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“…This efficient decoupling of iPS block copolymer synthesis and iPS segment crystallization was first demonstrated for the preparation of semicrystalline ABA‐type rubber triblock copolymers such as iPS‐block‐polydimethylsiloxane‐block‐iPS. Here, the covalent coupling of vinyl‐iPS with both Si‐H end groups of polydimethylsiloxane was achieved by means of a hydrosilylation reaction . Our alternative synthetic strategy for producing semicrystalline PCO‐ b ‐iPS diblock copolymers with variable iPS‐ and polycyclooctene‐block lengths is displayed in Scheme .…”

Section: Resultsmentioning

confidence: 96%

Semicrystalline rubber diblock copolymers via cyclooctene ROMP and chain transfer with vinyl-terminated isotactic polystyrene

Kirschvink

Gall

Vielhauer

et al. 2016

J. Polym. Sci. Part A: Polym. Chem.

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INTRODUCTION Ring-opening metathesis polymerization (ROMP) represents a versatile synthetic method enabling molecular engineering of a wide variety of polymeric materials for diversified applications. 1,2 Owing to the robustness of the ruthenium-based Grubbs' catalysts, 3,4 both non-polar cyclic olefin monomers and monomers bearing functional groups are tolerated in the ROMP process. The most common ROMP monomers include cyclic olefins such as cyclooctene, [5][6][7][8][9] and norbornene derivatives. [10][11][12] Today, the ROMP process is of particular interest in block and graft copolymer synthesis. semicrystalline polybutadiene-block-isotactic polystyrene (iPS) as semicrystalline rubber block copolymers by means of the living styrene/butadiene copolymerization on isospecific titanate complexes using sequenced feed of styrene and butadiene. Herein, we report on the synthesis of polycyclooctene-b-iPS (PCO-b-iPS) copolymers prepared by means of cyclooctene ROMP using vinyl-terminated iPS (vinyl-iPS) as the CTA, which is readily available by isospecific styrene polymerization in the presence of 1,9-decadiene. EXPERIMENTAL MaterialsAll reactions involving air-and/or moisture-sensitive compounds were carried out under a dry argon atmosphere using standard Schlenk techniques and a glove box (MBraun MB 150B-G-II). Ethyl vinyl ether (99%), 2,6-di-tert-butyl-4-methylphenol (BHT) and the Grubbs first Generation Catalyst benzylidene-bis(tricyclohexylphosphine)dichlororuthenium (G1) were purchased from Sigma and used as received. Ciscyclooctene (Sigma) was dried over CaH 2 and distilled under reduced pressure. Toluene (Sigma) was purified by using a Vacuum Atmospheres Co. solvent purifier. Vinyl-iPS was synthesized with the methylaluminoxane-activated metallocene

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“…In order to develop thermoplastic PDMS, physical crosslinks have been introduced to PDMS by copolymerization. Thermoplastic PDMS copolymers generally consist of a soft segment and a hard segment . The soft segment is composed of PDMS with an elastic property, while the hard segment introduces a thermoplastic polymer with the thermoplastic (remoldable) property .…”

Section: Introductionmentioning

confidence: 99%

Thermoplastic polydimethylsiloxane with l‐phenylalanine‐based hydrogen‐bond networks

Tazawa

Shimojima

Maeda

et al. 2017

J of Applied Polymer Sci

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Thermoplastic polydimethylsiloxane (PDMS) containing l‐phenylalanine was synthesized by the liquid‐phase synthesis method with an Fmoc‐protected amino acid and by the condensation polymerization. In order to investigate the mechanical and the thermoplastic properties of the PDMS with l‐phenylalanine, the tensile testing and the dynamic mechanical analysis (DMA) were conducted. From the results of the tensile testing, it was found that the stress at break of the PDMS with l‐phenylalanine nearly became seven times higher than that of the PDMS without l‐phenylalanine. The DMA results revealed that the PDMS could maintain its storage modulus for three heating cycles, while the melting temperature was also kept at ∼120 °C. Moreover, the mechanical property was analyzed through two remolding cycles, and it was found that the PDMS could almost maintain its mechanical property after the heat remolding. Finally, it was found that the PDMS also possessed some self‐healing property, where the Young's modulus of the cut PDMS could maintain at least 70% of its original Young's modulus after contact and self‐healing. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45419.

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Synthesis and characterization of semicrystalline triblockcopolymers of isotactic polystyrene and polydimethylsiloxane

Cited by 9 publications

References 20 publications

Recyclable Polydimethylsiloxane Network Crosslinked by Dynamic Transesterification Reaction

Recyclable Polydimethylsiloxane Network Crosslinked by Dynamic Transesterification Reaction

Semicrystalline rubber diblock copolymers via cyclooctene ROMP and chain transfer with vinyl-terminated isotactic polystyrene

Thermoplastic polydimethylsiloxane with l‐phenylalanine‐based hydrogen‐bond networks

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