High transparency and thermal stability of alicyclic polyimide with crosslinking structure by triallylamine

勤益科大機構典藏 > 電資學院 > 電子工程系(所) > 【電子工程系所】期刊論文 > Item 987654321/6719

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题名:	High transparency and thermal stability of alicyclic polyimide with crosslinking structure by triallylamine
作者:	陳若貞
贡献者:	電子工程(學)系
日期:	2011-07
上传时间:	2017-11-28 13:58:59 (UTC+8)
摘要:	Colorless alicyclic polyimides (ALPIs) were synthesized from an alicyclic dianhydride, bicyclo[2.2.2]oct-7-ene-2,3,5,6-tetracarboxylic dianhydride (BCDA) and an aromatic diamine, 3,4'-oxydianiline (3,4'-ODA). For comparison, a series of crosslinkable ALPI membranes with different content of crosslinkable reagents were prepared. The crosslinkable PI reacts with the crosslinkers and forms covalent bond to create the crosslink structure between PI backbones by free radical reaction. Almost of the crosslinkable PIs exhibit excellent dimensional stability and higher transparency because of the crosslink structure and non-conjugate alicyclic chain. All of the crosslink ALPIs could be coated into flexible and tough films. They had a UV-Vis cut-off at 297 nm and a transmittance of higher than 80% in near ultraviolet region. These PIs show low coefficient of thermal expansion ranging from 57.36 to 47.53 ppm/°C, the glass transition temperature in the range of 336.2-333.0 °C, the decomposition temperature in the range of 433.7-440.0 °C. The crosslinkable ALPIs show excellent optical properties with the excited wavelength ranging from 340 to 328 nm and stronger emission intensity than linear PI, the haze lower than 0.7, the refractive index about 1.6 and the abbe numbers over 165.
關聯:	Advanced Materials Research
显示于类别:	[電子工程系(所)] 【電子工程系所】期刊論文

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