Unveiling Thermal Transitions of Polymers in Subnanometre Pores

Overview

Journal Nat Commun

Specialty Biology

Date 2010 Oct 29

PMID 20981011

Citations 18

Authors

Takashi Uemura

Nobuhiro Yanai

Satoshi Watanabe

Hideki Tanaka

Ryohei Numaguchi

Minoru T Miyahara

Yusuke Ohta

Masataka Nagaoka

Susumu Kitagawa

Affiliations

Soon will be listed here.

Abstract

The thermal transitions of confined polymers are important for the application of polymers in molecular scale devices and advanced nanotechnology. However, thermal transitions of ultrathin polymer assemblies confined in subnanometre spaces are poorly understood. In this study, we show that incorporation of polyethylene glycol (PEG) into nanochannels of porous coordination polymers (PCPs) enabled observation of thermal transitions of the chain assemblies by differential scanning calorimetry. The pore size and surface functionality of PCPs can be tailored to study the transition behaviour of confined polymers. The transition temperature of PEG in PCPs was determined by manipulating the pore size and the pore-polymer interactions. It is also striking that the transition temperature of the confined PEG decreased as the molecular weight of PEG increased.

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