MOLECULAR-GEOMETRY AND CHAIN ENTANGLEMENT - PARAMETERS FOR THE TUBE MODEL
文献类型：期刊论文
| 作者 | HE TB ; PORTER RS |
| 刊名 | makromolekulare chemie-theory and simulations
 |
| 出版日期 | 1992 |
| 卷号 | 1期号:3页码:119-128 |
| 关键词 | CONCENTRATED POLYMER-SOLUTIONS DYNAMICS REPTATION SYSTEMS STATE |
| ISSN号 | 1018-5054 |
| 通讯作者 | he tb |
| 中文摘要 | the tube diameter in the reptation model is the distance between a given chain segment and its nearest segment in adjacent chains. this dimension is thus related to the cross-sectional area of polymer chains and the nearest approach among chains, without effects of thermal fluctuation and steric repulsion. prior calculated tube diameters are much larger, about 5 times, than the actual chain cross-sectional areas. this is ascribed to the local freedom required for mutual rearrangement among neighboring chain segments. this tube diameter concept seems to us to infer a relationship to the corresponding entanglement spacing. indeed, we report here that the critical molecular weight, m(c), for the onset of entanglements is found to be m(c) = 28 a/([r2]0/m), where a is the chain cross-sectional area and [r2]0 the mean-square end-to-end distance of a freely jointed chain of molecular weight m. the new, computed relationship between the critical number of backbone atoms for entanglement and the chain cross-sectional area of polymers, n(c) = a0,44, is concordant with the cross-sectional area of polymer chains being the parameter controlling the critical entanglement number of backbone atoms of flexible polymers. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| 公开日期 | 2011-01-19 ; 2011-06-10 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/37127]  |
| 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 | HE TB,PORTER RS. MOLECULAR-GEOMETRY AND CHAIN ENTANGLEMENT - PARAMETERS FOR THE TUBE MODEL[J]. makromolekulare chemie-theory and simulations,1992,1(3):119-128. |
| APA | HE TB,&PORTER RS.(1992).MOLECULAR-GEOMETRY AND CHAIN ENTANGLEMENT - PARAMETERS FOR THE TUBE MODEL.makromolekulare chemie-theory and simulations,1(3),119-128. |
| MLA | HE TB,et al."MOLECULAR-GEOMETRY AND CHAIN ENTANGLEMENT - PARAMETERS FOR THE TUBE MODEL".makromolekulare chemie-theory and simulations 1.3(1992):119-128. |
入库方式： OAI收割
来源：长春应用化学研究所
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