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Materials Science and Nanotechnology | Volume: 03
WORLD CONGRESS ON SMART MATERIALS AND STRUCTURES
&
3
rd
International Conference on
POLYMER CHEMISTRY AND MATERIALS ENGINEERING
November 21-22, 2019 | Singapore
Joint event on
T
he effect of the addition of a specific metal salt
compound on the glass transition temperature Tg as
well as the dynamic mechanical properties of polymers
was investigated using conventional plastic glasses such
as poly(methyl methacrylate) (PMMA) and polycarbonate
(PC). Lithium trifluoromethanesulfonate (LiFMS) and
lithium perchlorate (LiClO4) were found to be miscible
with PMMA and PC and thus the blends show excellent
transparency. Furthermore, the modulus enhancement
in the rheological glassy region was clearly detected by
the addition of the salts especially for PC. In the case of
PMMA, Tg was greatly enhanced, leading to improved
heat resistance, without losing its good flowability at
melt-processing temperature. The ion-dipole interaction
between oxygen atoms in the polymers and the lithium
cations dissociated in a polymer is responsible for the
phenomena, which becomes weak at high temperature.
This technique is applicable to various polymers. For
semicrystalline polymers, the crystallization rate tends to
decrease and thus the degree of crystallization becomes
low by the salt addition. Moreover, some specific salts
enhance the miscibility for immiscible polymer pairs.
Biography
Masayuki Yamaguchi has joined in Japan Advanced Institute of Science
and Technology after working in a chemical company in Japan for 17
years. He is a professor and a head of Materials Chemistry Area. He got his
doctorate in engineering from Kyoto University, Japan.
e:
m_yama@jaist.ac.jpMasayuki Yamaguchi
Japan Advanced Institute of Science and Technology, Japan
Structure and properties for polymeric materials containing specific salts
Mater Sci Nanotechnol, Volume: 03