ICCAS OpenIR
The relations between properties and physical aging of polyphenylquinoxaline film
Liu, WJ; Shen, JS; Lu, FC; Xu, M
2000-08-01
Source PublicationACTA POLYMERICA SINICA
ISSN1000-3304
Issue4Pages:415-419
AbstractPolyphenylquinoxaline (PPQ-E) is an aromatic heterocyclic polymer with high performance and water resistance at high temperature. It was synthesized form aromatic tetraamine and aromatic tetraketone by condensation polymerization. The influence of physical aging on structure and mechanical properties of polyphenylquinoxaline has been studied. The free volume and cohensional entanglement structure of samples preapared under two different thermal conditions were measured by positron annihilation life spectroscopy (PALS) and DSC. For samples which underwent physical aging an endothermic peak at the end of the glass transition was observed in a heating process. It means more cohensional entanglement structure forms during physical aging. The results of PALS show that physical aging may reduce the free volume in samples. A little increase of storage modulus in the temperature range from 100 degrees C to 300 degrees C and a decrease of mechanical loss at 250 similar to 300 degrees C result form physical aging. The tensile mechanical tests manifest that physical aging may result in a decrease of fracture strain and energy,an increase of yield stress and a transition from ductile to brittle generate for PPQ-E samples.
KeywordPhysical Aging Dsc Pals Tensile Properties Dynamic Mechanical Properties Polyphenylquinoxaline
Indexed BySCI
Language英语
WOS IDWOS:000089003100006
PublisherSCIENCE PRESS
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Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/75856
Collection中国科学院化学研究所
Corresponding AuthorLiu, WJ
AffiliationChinese Acad Sci, Inst Chem, Polymer Phys Lab, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Liu, WJ,Shen, JS,Lu, FC,et al. The relations between properties and physical aging of polyphenylquinoxaline film[J]. ACTA POLYMERICA SINICA,2000(4):415-419.
APA Liu, WJ,Shen, JS,Lu, FC,&Xu, M.(2000).The relations between properties and physical aging of polyphenylquinoxaline film.ACTA POLYMERICA SINICA(4),415-419.
MLA Liu, WJ,et al."The relations between properties and physical aging of polyphenylquinoxaline film".ACTA POLYMERICA SINICA .4(2000):415-419.
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