Novel moisture-sensitive shape memory polyurethanes containing pyridine moieties

Shaojun Chen; Jinlian Hu; Chun wah Yuen; Laikuen Chan

doi:10.1016/j.polymer.2009.07.031

Novel moisture-sensitive shape memory polyurethanes containing pyridine moieties

Shaojun Chen, Jinlian Hu, Chun wah Yuen, Laikuen Chan

The Hong Kong Polytechnic University

Research output: Journal article publication › Journal article › Academic research › peer-review

128 Citations (Scopus)

Abstract

In this communication, novel moisture-sensitive shape memory polyurethane (SMPU) was synthesized from 1,6-hexamethylene diisocyanate (HDI) and N,N-bis(2-hydroxylethyl) isonicotinamide (BINA) and 1,4-butanediol (BDO). Results show that the BINA based SMPUs have excellent moisture absorption properties which are not only influenced by the temperature, but also by the relative humidity (RH). As a result, high strain recovery with fast recovery speed is obtained after immersion in the moisture condition for a short time. FT-IR spectra provide a proof to the mechanism of moisture-sensitive SME which is based on the dissociation or disrupt of hydrogen bonding in the pyridine ring induced by moisture absorption. Thus, the strain recovery is achieved in the moisture-sensitive SMPUs by decreasing the glass transition temperature (Tg) below ambient temperature without external heating.

Original language	English
Pages (from-to)	4424-4428
Number of pages	5
Journal	Polymer
Volume	50
Issue number	19
DOIs	https://doi.org/10.1016/j.polymer.2009.07.031
Publication status	Published - 10 Sept 2009

Keywords

Polymer
Shape memory
Supramolecular structure

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics

More information

10.1016/j.polymer.2009.07.031

Cite this

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title = "Novel moisture-sensitive shape memory polyurethanes containing pyridine moieties",

abstract = "In this communication, novel moisture-sensitive shape memory polyurethane (SMPU) was synthesized from 1,6-hexamethylene diisocyanate (HDI) and N,N-bis(2-hydroxylethyl) isonicotinamide (BINA) and 1,4-butanediol (BDO). Results show that the BINA based SMPUs have excellent moisture absorption properties which are not only influenced by the temperature, but also by the relative humidity (RH). As a result, high strain recovery with fast recovery speed is obtained after immersion in the moisture condition for a short time. FT-IR spectra provide a proof to the mechanism of moisture-sensitive SME which is based on the dissociation or disrupt of hydrogen bonding in the pyridine ring induced by moisture absorption. Thus, the strain recovery is achieved in the moisture-sensitive SMPUs by decreasing the glass transition temperature (Tg) below ambient temperature without external heating.",

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author = "Shaojun Chen and Jinlian Hu and Yuen, {Chun wah} and Laikuen Chan",

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AU - Chen, Shaojun

AU - Hu, Jinlian

AU - Yuen, Chun wah

AU - Chan, Laikuen

PY - 2009/9/10

Y1 - 2009/9/10

N2 - In this communication, novel moisture-sensitive shape memory polyurethane (SMPU) was synthesized from 1,6-hexamethylene diisocyanate (HDI) and N,N-bis(2-hydroxylethyl) isonicotinamide (BINA) and 1,4-butanediol (BDO). Results show that the BINA based SMPUs have excellent moisture absorption properties which are not only influenced by the temperature, but also by the relative humidity (RH). As a result, high strain recovery with fast recovery speed is obtained after immersion in the moisture condition for a short time. FT-IR spectra provide a proof to the mechanism of moisture-sensitive SME which is based on the dissociation or disrupt of hydrogen bonding in the pyridine ring induced by moisture absorption. Thus, the strain recovery is achieved in the moisture-sensitive SMPUs by decreasing the glass transition temperature (Tg) below ambient temperature without external heating.

AB - In this communication, novel moisture-sensitive shape memory polyurethane (SMPU) was synthesized from 1,6-hexamethylene diisocyanate (HDI) and N,N-bis(2-hydroxylethyl) isonicotinamide (BINA) and 1,4-butanediol (BDO). Results show that the BINA based SMPUs have excellent moisture absorption properties which are not only influenced by the temperature, but also by the relative humidity (RH). As a result, high strain recovery with fast recovery speed is obtained after immersion in the moisture condition for a short time. FT-IR spectra provide a proof to the mechanism of moisture-sensitive SME which is based on the dissociation or disrupt of hydrogen bonding in the pyridine ring induced by moisture absorption. Thus, the strain recovery is achieved in the moisture-sensitive SMPUs by decreasing the glass transition temperature (Tg) below ambient temperature without external heating.

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KW - Shape memory

KW - Supramolecular structure

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DO - 10.1016/j.polymer.2009.07.031

M3 - Journal article

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JO - Polymer

JF - Polymer

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ER -

Novel moisture-sensitive shape memory polyurethanes containing pyridine moieties

Abstract

Keywords

ASJC Scopus subject areas

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