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Polymer Chemistry 2018

Polymer Sciences

ISSN: 2471-9935

Page 52

March 26-28, 2018

Vienna, Austria



Edition of International Conference and Exhibition on

Polymer Chemistry


arge quantities of polymer materials are used in electrical

products. However, strength of the polymer material decreases

under environmental condition, such as temperature, humidity

and so on. Polybutylene terephthalate and polycarbonate are

commonly used in the electrical products but hydrolyzed easily.

Therefore, it is necessary to estimate the lifetime of polymer

materials under customer environment. The long duration of

conventional accelerated temperature and humidity stress test

is a serious problem that exists. For the accelerated temperature

and humidity stress test, we made a variety of conditions of

temperature and humidity by use of constant temperature and

humidity apparatus using unsaturated superheated steam. We

measured the strength of polymer materials by bending test. The

time at which the strength decreased by hydrolysis was related

with water vapor pressure and calculated; this was done with

the estimated time under different temperature and-humidity

conditions, using Arrhenius equation. To estimate the time under

customer environment becomes possible and evaluation time

could be reduced.


Yuko Sawada received the B.E. degree in applied chemistry fromOsaka Pre-

fecture University in 1985, and in mechanical enginnering of Osaka Universi-

ty, Osaka, Japan. She was engaged in the research of the polymer materials

at the Advanced Technology R&D Center, Mitsubishi Electric Corporation,

Hyogo, Japan.

[email protected]

Estimation method of lifetime by the hydrolysis of polymer


Yuko Sawada


Daisuke Echizenya

Mitsubishi Electric Corporation, Japan

Yuko Sawada et al., Polym Sci, Volume 4

DOI: 10.4172/2471-9935-C1-008