雙分散高分子薄膜中短鏈對(duì)長鏈纏結(jié)和動(dòng)力學(xué)的影響
發(fā)布時(shí)間:2018-09-04 08:42
【摘要】:采用Monte Carlo微觀模擬結(jié)合原始路徑分析的方法,研究了分子量雙分散的高分子薄膜中短鏈的質(zhì)量分?jǐn)?shù)對(duì)長鏈的纏結(jié)和動(dòng)力學(xué)行為的影響.模擬發(fā)現(xiàn),當(dāng)短鏈的質(zhì)量分?jǐn)?shù)較大時(shí),薄膜內(nèi)纏結(jié)點(diǎn)之間的關(guān)聯(lián)性較低,纏結(jié)點(diǎn)易于被解開,長鏈動(dòng)力學(xué)受到鏈?zhǔn)芟蕹潭鹊目刂?隨著膜厚的減小單調(diào)減慢;當(dāng)短鏈的質(zhì)量分?jǐn)?shù)較小時(shí),薄膜內(nèi)纏結(jié)點(diǎn)之間的關(guān)聯(lián)性較高,纏結(jié)點(diǎn)不易被解開,纏結(jié)點(diǎn)數(shù)目和關(guān)聯(lián)性共同導(dǎo)致長鏈動(dòng)力學(xué)隨膜厚的非單調(diào)變化.模擬結(jié)果為明晰分子量分布對(duì)高分子薄膜中鏈纏結(jié)和動(dòng)力學(xué)行為的影響規(guī)律提供了有益參考.
[Abstract]:The effects of the mass fraction of short chains on the entanglement and kinetic behavior of long chains were studied by means of Monte Carlo microsimulation and original path analysis. The simulation results show that when the mass fraction of the short chain is high, the correlation between the entanglement points in the film is low, the entanglement point is easy to be untied, and the long chain dynamics is controlled by the chain restriction degree, and decreases monotonously with the decrease of the film thickness. When the mass fraction of the short chain is small, the correlation between the entanglement points in the film is higher, and the entanglement point is difficult to be solved. The number of entanglement points and the correlation result in the non-monotone variation of the long chain dynamics with the film thickness. The simulation results provide a useful reference for clarifying the influence of molecular weight distribution on chain entanglement and kinetic behavior in polymer films.
【作者單位】: 吉林大學(xué)材料科學(xué)與工程學(xué)院教育部汽車材料重點(diǎn)實(shí)驗(yàn)室;中國人民武裝警察部隊(duì)學(xué)院消防指揮系;中國科學(xué)院長春應(yīng)用化學(xué)研究所高分子物理與化學(xué)國家重點(diǎn)實(shí)驗(yàn)室;
【分類號(hào)】:O631
本文編號(hào):2221579
[Abstract]:The effects of the mass fraction of short chains on the entanglement and kinetic behavior of long chains were studied by means of Monte Carlo microsimulation and original path analysis. The simulation results show that when the mass fraction of the short chain is high, the correlation between the entanglement points in the film is low, the entanglement point is easy to be untied, and the long chain dynamics is controlled by the chain restriction degree, and decreases monotonously with the decrease of the film thickness. When the mass fraction of the short chain is small, the correlation between the entanglement points in the film is higher, and the entanglement point is difficult to be solved. The number of entanglement points and the correlation result in the non-monotone variation of the long chain dynamics with the film thickness. The simulation results provide a useful reference for clarifying the influence of molecular weight distribution on chain entanglement and kinetic behavior in polymer films.
【作者單位】: 吉林大學(xué)材料科學(xué)與工程學(xué)院教育部汽車材料重點(diǎn)實(shí)驗(yàn)室;中國人民武裝警察部隊(duì)學(xué)院消防指揮系;中國科學(xué)院長春應(yīng)用化學(xué)研究所高分子物理與化學(xué)國家重點(diǎn)實(shí)驗(yàn)室;
【分類號(hào)】:O631
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