Thermal Decomposition Behavior and Durability Evaluation of Thermotropic Liquid Crystalline Polymers
- Authors
- Shin, Sang Mi; Kim, Seong Hun; Song, Jun Kwang
- Issue Date
- Mar-2009
- Publisher
- POLYMER SOC KOREA
- Keywords
- thermotropic liquid crystal polymer (TLCP); thermal decomposition; thermogravimetric analysis (TGA); durability; degradation
- Citation
- MACROMOLECULAR RESEARCH, v.17, no.3, pp.149 - 155
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- MACROMOLECULAR RESEARCH
- Volume
- 17
- Number
- 3
- Start Page
- 149
- End Page
- 155
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/177155
- DOI
- 10.1007/BF03218671
- ISSN
- 1598-5032
- Abstract
- The thermal decomposition behavior and degradation characteristics of four different thermotropic liquid crystalline polymers (TLCPs) were studied. The thermal decomposition behavior was determined by means of thermogravimetric analysis (TGA) at different heating rates in nitrogen and air. The order of the thermal stability was as follows: multi-aromatic polyester > hydroxybenzoic acid (HBA)/hydroxynaphthoic acid (HNA) copolyester > HNA/hydroxyl acetaniline (HAA)/terephthalic acid (TA) copolyester > HBA/Poly(ethylene terephthalate) (PET) copolyester. The activation energies of the thermal degradation were calculated by four multiple heating rate methods: Flynn-Wall, Friedman, Kissinger, and Kim-Park. The Flynn-Wall and Kim-Park methods were the most suitable methods to calculate the activation energy. Samples were exposed to an accelerated degradation test (ADT), under fixed conditions of heat (63 +/- 3 degrees C), humidity (30 +/- 4%) and Xenon are radiation (1.10 W/m(2)), and the changes in surface morphology and color difference with time were determined. The TLCPs decomposed, discolored and cracked upon exposure to ultraviolet radiation.
- Files in This Item
-
Go to Link
- Appears in
Collections - 서울 공과대학 > 서울 유기나노공학과 > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/177155)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.