Unveiling the dependence of glass transitions on mixing thermodynamics in miscible systems.
Unveiling the dependence of glass transitions on mixing thermodynamics in miscible systems.
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揭示混溶系统中玻璃化转变对混合热力学的依赖性
DOI:
10.1038/srep08500
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发表时间:
2015-02-17
影响因子:
4.6
通讯作者:
Wang LM
中科院分区:
文献类型:
--
作者:
Tu W;Wang Y;Li X;Zhang P;Tian Y;Jin S;Wang LM
The dependence of the glass transition in mixtures on mixing thermodynamics is examined by focusing on enthalpy of mixing, ΔHmix with the change in sign (positive vs. negative) and magnitude (small vs. large). The effects of positive and negative ΔHmix are demonstrated based on two isomeric systems of o- vs. m- methoxymethylbenzene (MMB) and o- vs. m- dibromobenzene (DBB) with comparably small absolute ΔHmix. Two opposite composition dependences of the glass transition temperature, Tg, are observed with the MMB mixtures showing a distinct negative deviation from the ideal mixing rule and the DBB mixtures having a marginally positive deviation. The system of 1, 2- propanediamine (12PDA) vs. propylene glycol (PG) with large and negative ΔHmix is compared with the systems of small ΔHmix, and a considerably positive Tg shift is seen. Models involving the properties of pure components such as Tg, glass transition heat capacity increment, ΔCp, and density, ρ, do not interpret the observed Tg shifts in the systems. In contrast, a linear correlation is revealed between ΔHmix and maximum Tg shifts.
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DOI:
10.1002/jctb.5010020901
发表时间:
1952-01-01
期刊:
JOURNAL OF APPLIED CHEMISTRY
影响因子:
--
作者:
GORDON, M;TAYLOR, JS
通讯作者:
TAYLOR, JS
影响因子:
3.5
作者:
Davis, MI;Molina, MC;Douheret, G
通讯作者:
Douheret, G
影响因子:
3.3
作者:
Hu, Lina;Yue, Yuanzheng
通讯作者:
Yue, Yuanzheng
影响因子:
4.4
作者:
Ediger, M. D.;Harrowell, Peter
通讯作者:
Harrowell, Peter
DOI:
10.1051/jcp/1973701355
发表时间:
1973-01-01
期刊:
JOURNAL DE CHIMIE PHYSIQUE ET DE PHYSICO-CHIMIE BIOLOGIQUE
影响因子:
--
作者:
ABELLO, L
通讯作者:
ABELLO, L