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Thermoplastic elastomers of alloocimene and isobutylene triblock copolymers

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Title
Thermoplastic elastomers of alloocimene and isobutylene triblock copolymers
Author(s)
J.H. Roh; Roy D.; Lee W.K.; Gergely A.L.; Puskas J.E.; Roland C.M.
Publication Date
2015-01
Journal
POLYMER, v.56, no.SI, pp.280 - 283
Publisher
ELSEVIER SCI LTD
Abstract
A novel triblock copolymer, having a center block of high molecular weight polyisobutylene (PIB) and alloocimene (allo) end-blocks, was synthesized and the mechanical properties characterized. The phaseseparated morphology consists of tethered PIB, with the glassy allo domains functioning as reinforcing filler. Thus, at ambient temperature the dynamic modulus is larger than that of PIB homopolymer by about 40%, and there is pronounced reinforcement from the glassy domains. The triblock polymer exhibits thermoplastic elastomer behavior, consistent with the structure. For temperatures above the allo glass transition (71 C), the material undergoes an orderedisorder transition, which causes substantial softening; however, this lability of the mechanical response is largely reversible. Since the repeat units of polyisobutylene cannot be crosslinked, this new material offers a route to processible, PIB based networks.
URI
https://pr.ibs.re.kr/handle/8788114/1635
ISSN
0032-3861
Appears in Collections:
Center for Self-assembly and Complexity(복잡계 자기조립 연구단) > Journal Papers (저널논문)
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