Synthesis and properties of new thermoplastic elastomers containing poly[4-(1-adamantyl)styrene] hard segments

Shingo Kobayashi; Hiroshi Kataoka; Takashi Ishizone; Toshinori Kato; Tomohiro Ono; Syuji Kobukata; Hiroyuki Ogi

doi:10.1021/ma7028743

Synthesis and properties of new thermoplastic elastomers containing poly[4-(1-adamantyl)styrene] hard segments

Shingo Kobayashi, Hiroshi Kataoka, Takashi Ishizone, Toshinori Kato, Tomohiro Ono, Syuji Kobukata, Hiroyuki Ogi

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

The anionic polymerization of 4-(1-adamantyl)styrene (AdS) was carried out with s-BuLi in cyclohexane at 50°C. The resulting poly(AdS) had predicted molecular weights, narrow molecular weight distributions, and high glass transition temperature (T_g) around 232°C. A series of well-defined ABA type triblock copolymers, where B midblock stood for 1,4-polyisoprene and A end blocks for poly(AdS) (A), poly(AdS-ran-styrene) (AS), and polystyrene (S), were successfully synthesized by the sequential copolymerization with s-BuLi in cyclohexane. The 1,4-polyisoprene midblocks of triblock copolymers were completely converted into the saturated poly(ethylene-alt-propylene) (EP) blocks via hydrogenation with p-toluenesulfonhydrazide. Novel tailored thermoplastic elastomers, A-EP-A and AS-EP-AS, carrying bulky adamantyl groups in the hard end blocks were analyzed by dynamic mechanical analysis, stress relaxation test, tensile test, and transmission electron microscopy. These triblock copolymers were phase separated, and showed the high tensile strength (22-24 MPa), high elongation at break (590-660%), and high upper service temperature (175-210°C). The heat resistant properties of A-EP-A and AS-EP-AS were drastically enhanced by substitution of the outer S segments in S-EP-S with either A or AS segments.

Original language	English
Pages (from-to)	5502-5508
Number of pages	7
Journal	Macromolecules
Volume	41
Issue number	14
DOIs	https://doi.org/10.1021/ma7028743
Publication status	Published - Jul 22 2008
Externally published	Yes

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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10.1021/ma7028743

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title = "Synthesis and properties of new thermoplastic elastomers containing poly[4-(1-adamantyl)styrene] hard segments",

abstract = "The anionic polymerization of 4-(1-adamantyl)styrene (AdS) was carried out with s-BuLi in cyclohexane at 50°C. The resulting poly(AdS) had predicted molecular weights, narrow molecular weight distributions, and high glass transition temperature (Tg) around 232°C. A series of well-defined ABA type triblock copolymers, where B midblock stood for 1,4-polyisoprene and A end blocks for poly(AdS) (A), poly(AdS-ran-styrene) (AS), and polystyrene (S), were successfully synthesized by the sequential copolymerization with s-BuLi in cyclohexane. The 1,4-polyisoprene midblocks of triblock copolymers were completely converted into the saturated poly(ethylene-alt-propylene) (EP) blocks via hydrogenation with p-toluenesulfonhydrazide. Novel tailored thermoplastic elastomers, A-EP-A and AS-EP-AS, carrying bulky adamantyl groups in the hard end blocks were analyzed by dynamic mechanical analysis, stress relaxation test, tensile test, and transmission electron microscopy. These triblock copolymers were phase separated, and showed the high tensile strength (22-24 MPa), high elongation at break (590-660%), and high upper service temperature (175-210°C). The heat resistant properties of A-EP-A and AS-EP-AS were drastically enhanced by substitution of the outer S segments in S-EP-S with either A or AS segments.",

author = "Shingo Kobayashi and Hiroshi Kataoka and Takashi Ishizone and Toshinori Kato and Tomohiro Ono and Syuji Kobukata and Hiroyuki Ogi",

year = "2008",

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T1 - Synthesis and properties of new thermoplastic elastomers containing poly[4-(1-adamantyl)styrene] hard segments

AU - Kobayashi, Shingo

AU - Kataoka, Hiroshi

AU - Ishizone, Takashi

AU - Kato, Toshinori

AU - Ono, Tomohiro

AU - Kobukata, Syuji

AU - Ogi, Hiroyuki

PY - 2008/7/22

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N2 - The anionic polymerization of 4-(1-adamantyl)styrene (AdS) was carried out with s-BuLi in cyclohexane at 50°C. The resulting poly(AdS) had predicted molecular weights, narrow molecular weight distributions, and high glass transition temperature (Tg) around 232°C. A series of well-defined ABA type triblock copolymers, where B midblock stood for 1,4-polyisoprene and A end blocks for poly(AdS) (A), poly(AdS-ran-styrene) (AS), and polystyrene (S), were successfully synthesized by the sequential copolymerization with s-BuLi in cyclohexane. The 1,4-polyisoprene midblocks of triblock copolymers were completely converted into the saturated poly(ethylene-alt-propylene) (EP) blocks via hydrogenation with p-toluenesulfonhydrazide. Novel tailored thermoplastic elastomers, A-EP-A and AS-EP-AS, carrying bulky adamantyl groups in the hard end blocks were analyzed by dynamic mechanical analysis, stress relaxation test, tensile test, and transmission electron microscopy. These triblock copolymers were phase separated, and showed the high tensile strength (22-24 MPa), high elongation at break (590-660%), and high upper service temperature (175-210°C). The heat resistant properties of A-EP-A and AS-EP-AS were drastically enhanced by substitution of the outer S segments in S-EP-S with either A or AS segments.

AB - The anionic polymerization of 4-(1-adamantyl)styrene (AdS) was carried out with s-BuLi in cyclohexane at 50°C. The resulting poly(AdS) had predicted molecular weights, narrow molecular weight distributions, and high glass transition temperature (Tg) around 232°C. A series of well-defined ABA type triblock copolymers, where B midblock stood for 1,4-polyisoprene and A end blocks for poly(AdS) (A), poly(AdS-ran-styrene) (AS), and polystyrene (S), were successfully synthesized by the sequential copolymerization with s-BuLi in cyclohexane. The 1,4-polyisoprene midblocks of triblock copolymers were completely converted into the saturated poly(ethylene-alt-propylene) (EP) blocks via hydrogenation with p-toluenesulfonhydrazide. Novel tailored thermoplastic elastomers, A-EP-A and AS-EP-AS, carrying bulky adamantyl groups in the hard end blocks were analyzed by dynamic mechanical analysis, stress relaxation test, tensile test, and transmission electron microscopy. These triblock copolymers were phase separated, and showed the high tensile strength (22-24 MPa), high elongation at break (590-660%), and high upper service temperature (175-210°C). The heat resistant properties of A-EP-A and AS-EP-AS were drastically enhanced by substitution of the outer S segments in S-EP-S with either A or AS segments.

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Synthesis and properties of new thermoplastic elastomers containing poly[4-(1-adamantyl)styrene] hard segments

Abstract

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