Phenylethynyl-endcapped oligomides with low melt viscosities and high Tgs: effects of the molecular weights
文献类型：期刊论文
| 作者 | Su CN(苏曹宁); Ji M(冀棉); Fan L(范琳); Yang SY(杨士勇) |
| 刊名 | High Performance Polymers
 |
| 出版日期 | 2011 |
| 卷号 | 23期号:5页码:352–361 |
| 关键词 | Oligomides melt viscosity thermal stability mechanical property |
| 产权排序 | 第一 |
| 通讯作者 | 杨士勇 |
| 英文摘要 | Phenylethynyl-endcapped imideoligomers (oligomides) with low melt viscosities and high glass transition temperatures (Tg) were prepared by the high temperature polycondensation of 2,3,3’,4’-biphenyltetracarboxcylic anhydride (a-BPDA), 4,4’-methylenebis(2,6-dimethylaniline) (MBDA) and 4-phenylethynyl-phthalic anhydride (4-PEPA). Experimental results indicated that the oligomides were mixtures of biphenylethynyl-endcapped imide oligomers with different degrees of polymerization (DP = 0, 1, 2, 3, 4), corresponding to the molecular weights (Mn) of 737 to 2787 determined by MALDI-TOF. The melt viscosities of the oligomide were reduced by lowering the calculated molecular weight (Calc’d Mn). The thermally cured polyimide neat resins showed glass transition temperatures (Tg) of > 400 ℃ and 5% weight loss temperature (T5) of > 499 ℃. It was also found that the mechanical properties of the thermally cured polyimide neat resins were dependent on the Calc’d Mn values of the oligomide, and improved gradually with increasing Calc’d Mn. |
| 学科主题 | 高分子物理化学 |
| 公开日期 | 2015-10-13 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/27124]  |
| 专题 | 化学研究所_高技术材料实验室 |
| 作者单位 | 中国科学院化学研究所 |
| 推荐引用方式 GB/T 7714 | Su CN,Ji M,Fan L,et al. Phenylethynyl-endcapped oligomides with low melt viscosities and high Tgs: effects of the molecular weights[J]. High Performance Polymers,2011,23(5):352–361. |
| APA | 苏曹宁,冀棉,范琳,&杨士勇.(2011).Phenylethynyl-endcapped oligomides with low melt viscosities and high Tgs: effects of the molecular weights.High Performance Polymers,23(5),352–361. |
| MLA | 苏曹宁,et al."Phenylethynyl-endcapped oligomides with low melt viscosities and high Tgs: effects of the molecular weights".High Performance Polymers 23.5(2011):352–361. |
入库方式： OAI收割
来源：化学研究所
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