Heat triggered shape memory behavior of poly(tert-butyl acrylate) based star-block copolymers in physiological range

Gozde Aktas Eken; Metin Hayri Acar

doi:10.1016/j.eurpolymj.2020.109611

Heat triggered shape memory behavior of poly(tert-butyl acrylate) based star-block copolymers in physiological range

Gozde Aktas Eken, Metin Hayri Acar^*

^*Corresponding author for this work

Department of Chemistry

Istanbul Technical University

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

2 Citations (Scopus)

Abstract

A series of poly(tert-butyl acrylate) (PtBA) based star-block copolymers were synthesized to obtain physically cross-linked shape memory polymers (SMPs) with body temperature triggering. First, PtBA star polymers were prepared via atom transfer radical polymerization (ATRP) to form the hard segment. Then star polymers were used as macro-initiators (MI) and combined with linear/non-linear derivatives of poly(ethylene glycol) (PEG), which build the soft segment. Characteristics of star-block copolymers were controlled by fraction, molecular weight and topology of the soft segment. Copolymers were prepared with varying soft segment ratio from 5.3 to 55.4 wt% and T_m of soft segment is adjusted between 28.9 and 55.6 °C. PtBA based copolymers with enhanced hydrophilicity (from 86.3 to 57.6°) exhibited T_m based shape memory behavior around body temperature with good shape recovery (R_r = 98.5%) and shape fixity (R_f = 98%).

Original language	English
Article number	109611
Journal	European Polymer Journal
Volume	128
DOIs	https://doi.org/10.1016/j.eurpolymj.2020.109611
Publication status	Published - 5 Apr 2020

Bibliographical note

Publisher Copyright:
© 2020 Elsevier Ltd

Funding

This work was supported by the Research Foundation of Istanbul Technical University, Istanbul, Turkey (Project grant number: 41240 ).

Funders	Funder number
Istanbul Technical University, Istanbul, Turkey	41240

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10.1016/j.eurpolymj.2020.109611

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title = "Heat triggered shape memory behavior of poly(tert-butyl acrylate) based star-block copolymers in physiological range",

abstract = "A series of poly(tert-butyl acrylate) (PtBA) based star-block copolymers were synthesized to obtain physically cross-linked shape memory polymers (SMPs) with body temperature triggering. First, PtBA star polymers were prepared via atom transfer radical polymerization (ATRP) to form the hard segment. Then star polymers were used as macro-initiators (MI) and combined with linear/non-linear derivatives of poly(ethylene glycol) (PEG), which build the soft segment. Characteristics of star-block copolymers were controlled by fraction, molecular weight and topology of the soft segment. Copolymers were prepared with varying soft segment ratio from 5.3 to 55.4 wt% and Tm of soft segment is adjusted between 28.9 and 55.6 °C. PtBA based copolymers with enhanced hydrophilicity (from 86.3 to 57.6°) exhibited Tm based shape memory behavior around body temperature with good shape recovery (Rr = 98.5%) and shape fixity (Rf = 98%).",

author = "Eken, {Gozde Aktas} and Acar, {Metin Hayri}",

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AU - Eken, Gozde Aktas

AU - Acar, Metin Hayri

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N2 - A series of poly(tert-butyl acrylate) (PtBA) based star-block copolymers were synthesized to obtain physically cross-linked shape memory polymers (SMPs) with body temperature triggering. First, PtBA star polymers were prepared via atom transfer radical polymerization (ATRP) to form the hard segment. Then star polymers were used as macro-initiators (MI) and combined with linear/non-linear derivatives of poly(ethylene glycol) (PEG), which build the soft segment. Characteristics of star-block copolymers were controlled by fraction, molecular weight and topology of the soft segment. Copolymers were prepared with varying soft segment ratio from 5.3 to 55.4 wt% and Tm of soft segment is adjusted between 28.9 and 55.6 °C. PtBA based copolymers with enhanced hydrophilicity (from 86.3 to 57.6°) exhibited Tm based shape memory behavior around body temperature with good shape recovery (Rr = 98.5%) and shape fixity (Rf = 98%).

AB - A series of poly(tert-butyl acrylate) (PtBA) based star-block copolymers were synthesized to obtain physically cross-linked shape memory polymers (SMPs) with body temperature triggering. First, PtBA star polymers were prepared via atom transfer radical polymerization (ATRP) to form the hard segment. Then star polymers were used as macro-initiators (MI) and combined with linear/non-linear derivatives of poly(ethylene glycol) (PEG), which build the soft segment. Characteristics of star-block copolymers were controlled by fraction, molecular weight and topology of the soft segment. Copolymers were prepared with varying soft segment ratio from 5.3 to 55.4 wt% and Tm of soft segment is adjusted between 28.9 and 55.6 °C. PtBA based copolymers with enhanced hydrophilicity (from 86.3 to 57.6°) exhibited Tm based shape memory behavior around body temperature with good shape recovery (Rr = 98.5%) and shape fixity (Rf = 98%).

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Heat triggered shape memory behavior of poly(tert-butyl acrylate) based star-block copolymers in physiological range

Abstract

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