Molecular-Spring Shape-Memory Polymer Based on Energy Elasticity and Local Phase Transition

Sang Hoon Kang; Toshiki Aoki; Giseop Kwak

doi:10.1021/acs.macromol.9b01636

Molecular-Spring Shape-Memory Polymer Based on Energy Elasticity and Local Phase Transition

Sang Hoon Kang, Toshiki Aoki, Giseop Kwak

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

7 Scopus citations

Abstract

A molecular-spring polyacetylene, with a highly twisted helical main chain and a paraffin-like octadecyl side chain (PDMC18SP), was synthesized and compared with other polymer derivatives in terms of physicochemical, thermodynamic, and (thermo)mechanical properties. PDMC18SP had lower fractional free volume (0.15) and higher solubility parameter (18.4 MPa^1/2) than other polymers. The chain packing structure was considerably collapsed at room temperature, resulting in a highly disordered amorphous phase. PDMC18SP was very soft at room temperature and could be stretched and contracted to large extents with very low tensile strength (0.7 MPa) and large strain (504.4%). PDMC18SP showed a distinct endothermic peak (30.0 J·g^-1) due to the melting of the octadecyl side chains at ∼7.05 °C. This polymer showed a relatively high plateau modulus of ∼1.87 MPa and a low entanglement molecular weight of ∼1,410 g·mol^-1. The mechanical deformation was fixed by cooling, and the original shape was readily recovered by heating.

Original language	English
Pages (from-to)	7984-7993
Number of pages	10
Journal	Macromolecules
Volume	52
Issue number	21
DOIs	https://doi.org/10.1021/acs.macromol.9b01636
State	Published - 12 Nov 2019

Access to Document

10.1021/acs.macromol.9b01636

Cite this

@article{cdf2223f6fff49039a7963f57ed537e0,

title = "Molecular-Spring Shape-Memory Polymer Based on Energy Elasticity and Local Phase Transition",

abstract = "A molecular-spring polyacetylene, with a highly twisted helical main chain and a paraffin-like octadecyl side chain (PDMC18SP), was synthesized and compared with other polymer derivatives in terms of physicochemical, thermodynamic, and (thermo)mechanical properties. PDMC18SP had lower fractional free volume (0.15) and higher solubility parameter (18.4 MPa1/2) than other polymers. The chain packing structure was considerably collapsed at room temperature, resulting in a highly disordered amorphous phase. PDMC18SP was very soft at room temperature and could be stretched and contracted to large extents with very low tensile strength (0.7 MPa) and large strain (504.4%). PDMC18SP showed a distinct endothermic peak (30.0 J·g-1) due to the melting of the octadecyl side chains at ∼7.05 °C. This polymer showed a relatively high plateau modulus of ∼1.87 MPa and a low entanglement molecular weight of ∼1,410 g·mol-1. The mechanical deformation was fixed by cooling, and the original shape was readily recovered by heating.",

author = "Kang, {Sang Hoon} and Toshiki Aoki and Giseop Kwak",

note = "Publisher Copyright: Copyright {\textcopyright} 2019 American Chemical Society.",

year = "2019",

month = nov,

day = "12",

doi = "10.1021/acs.macromol.9b01636",

language = "English",

volume = "52",

pages = "7984--7993",

journal = "Macromolecules",

issn = "0024-9297",

publisher = "American Chemical Society",

number = "21",

}

TY - JOUR

T1 - Molecular-Spring Shape-Memory Polymer Based on Energy Elasticity and Local Phase Transition

AU - Kang, Sang Hoon

AU - Aoki, Toshiki

AU - Kwak, Giseop

PY - 2019/11/12

Y1 - 2019/11/12

N2 - A molecular-spring polyacetylene, with a highly twisted helical main chain and a paraffin-like octadecyl side chain (PDMC18SP), was synthesized and compared with other polymer derivatives in terms of physicochemical, thermodynamic, and (thermo)mechanical properties. PDMC18SP had lower fractional free volume (0.15) and higher solubility parameter (18.4 MPa1/2) than other polymers. The chain packing structure was considerably collapsed at room temperature, resulting in a highly disordered amorphous phase. PDMC18SP was very soft at room temperature and could be stretched and contracted to large extents with very low tensile strength (0.7 MPa) and large strain (504.4%). PDMC18SP showed a distinct endothermic peak (30.0 J·g-1) due to the melting of the octadecyl side chains at ∼7.05 °C. This polymer showed a relatively high plateau modulus of ∼1.87 MPa and a low entanglement molecular weight of ∼1,410 g·mol-1. The mechanical deformation was fixed by cooling, and the original shape was readily recovered by heating.

AB - A molecular-spring polyacetylene, with a highly twisted helical main chain and a paraffin-like octadecyl side chain (PDMC18SP), was synthesized and compared with other polymer derivatives in terms of physicochemical, thermodynamic, and (thermo)mechanical properties. PDMC18SP had lower fractional free volume (0.15) and higher solubility parameter (18.4 MPa1/2) than other polymers. The chain packing structure was considerably collapsed at room temperature, resulting in a highly disordered amorphous phase. PDMC18SP was very soft at room temperature and could be stretched and contracted to large extents with very low tensile strength (0.7 MPa) and large strain (504.4%). PDMC18SP showed a distinct endothermic peak (30.0 J·g-1) due to the melting of the octadecyl side chains at ∼7.05 °C. This polymer showed a relatively high plateau modulus of ∼1.87 MPa and a low entanglement molecular weight of ∼1,410 g·mol-1. The mechanical deformation was fixed by cooling, and the original shape was readily recovered by heating.

UR - http://www.scopus.com/inward/record.url?scp=85073669628&partnerID=8YFLogxK

U2 - 10.1021/acs.macromol.9b01636

DO - 10.1021/acs.macromol.9b01636

M3 - Article

AN - SCOPUS:85073669628

SN - 0024-9297

VL - 52

SP - 7984

EP - 7993

JO - Macromolecules

JF - Macromolecules

IS - 21

ER -

Molecular-Spring Shape-Memory Polymer Based on Energy Elasticity and Local Phase Transition

Abstract

Access to Document

Other files and links

Fingerprint

Cite this