SYNTHESIS AND CHARACTERIZATION OF WELL-DEFINED ALTERNATING ETHYLENE-PROPYLENE COPOLYMER
文献类型：期刊论文
| 作者 | Li W ; Li Y ; Hu YM ; Wang LF ; Cui DM ; Wang YR |
| 刊名 | acta polymerica sinica
 |
| 出版日期 | 2010 |
| 卷号 | 8期号:8页码:961-965 |
| 关键词 | NATURAL-RUBBER HYDROGENATION CATALYST |
| ISSN号 | 1000-3304 |
| 通讯作者 | li w |
| 中文摘要 | alternating ethylene-propylene copolymer (alt-ep) was synthesized by hydrogenation of polyisoprene (hcpi) having high cis-1,4 content (ca. 100%), suitable molecular weight (m-n = 41 x 10(4)), and relatively narrow molecular weight distribution (m-w/m-n = 1.02). the hydrogenation of hcpi was carried out with ni(naph)(2)/al(i-bu)(3) catalyst at 60 degrees c and hydrogen pressure of 4.0 mpa in cyclohexane for 3 h. nmr and ftir spectra showed that the characteristic peaks of carbon-carbon double bond disappeared in hydrogenated hcpi, indicating that the hydrogenation degree of the resulting polymer was up to 100%. gpc analysis indicated that the alt-ep maintained relatively narrow molecular weight distribution (m-w/m-n = 1. 12), and degradation or crosslinking reaction did not occur during hydrogenation reaction of hcpi. nmr and ftir spectra as well as waxd analysis showed that the alt-ep was well-defined ethylene-propylene copolymer having high alternation, and the present completely alternating ethylene and propylene copolymer was synthesized for the first time. further, the thermal properties of hcpi and alt-ep were examined by tga and dsc. the glass transition temperature of alt-ep was -63.3 degrees c, whose value is larger than that of hcpi (-66.7 degrees c). the onset temperature of weight loss of alt-ep was 355 degrees c and much higher than that of hcpi (266 degrees c), which suggesting that the thermal stability is enhanced upon hydrogenation. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 中文 |
| WOS记录号 | WOS:000280971700001 |
| 公开日期 | 2012-04-26 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/43527]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Li W,Li Y,Hu YM,et al. SYNTHESIS AND CHARACTERIZATION OF WELL-DEFINED ALTERNATING ETHYLENE-PROPYLENE COPOLYMER[J]. acta polymerica sinica,2010,8(8):961-965. |
| APA | Li W,Li Y,Hu YM,Wang LF,Cui DM,&Wang YR.(2010).SYNTHESIS AND CHARACTERIZATION OF WELL-DEFINED ALTERNATING ETHYLENE-PROPYLENE COPOLYMER.acta polymerica sinica,8(8),961-965. |
| MLA | Li W,et al."SYNTHESIS AND CHARACTERIZATION OF WELL-DEFINED ALTERNATING ETHYLENE-PROPYLENE COPOLYMER".acta polymerica sinica 8.8(2010):961-965. |
入库方式： OAI收割
来源：长春应用化学研究所
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