Dynamics of Spinodal Decomposition in Critical Polymer Mixtures

临界聚合物混合物中的调幅分解动力学

• 批准号: 60470100
• 负责人: KUWAHARA Nobuhiro
• 金额: $ 2.3万
• 依托单位: Gunma University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-60470100/
• 关键词: Phase Separation; Spinodal Decomposition; Critical-Point Universality; Polymer Solution; Colloidal Solution; 臨界共溶点

Dynamics of phase separation has been studied near the upper critical mixing point ( <T_c> =34.42゜C, <W_c> =12.1 wt.%) of the system polydimethylsiloxane (PDMS, <M_n> <-![> <M_w> =80 x <10^3> )-diethyl carbonate (DEC) and the lower critical mixing point ( <T_c> =31.89゜C, <W_c> =1.20 wt.%) of the system pentaethylene glycol dodecyl ether ( <C_(12)> <E_5> )-water (W). The gist obtained is as follows.1. The system <C_(12)> <E_5> -W near its critical mixing point deviates from the universality class of fluids, binary mixtures, and alloys near their critical points.2. When the critical mixture of PDMS-DEC and of <C_(12)> <E_5> -W are suddenly brought into the inside of their spinodal curves, clusters in the minority phase grow gradually and the forward scattered-light intensity I forms the maximum peak <I_m> at momentum transfer k= <k_m> .1) For PDMS-DEC at <T_c> -T <-![> 5 mK the light intensity I(k,t) increases in accordance with I(k,t)[ <t^(1.5)> at momentum transfer k=2.5 x <10^3> <cm^(-1)> for a time of t <<![> 60 sec, I(k,t)[ <t^(2.5)> at k=1.6 x <10^3> <cm^(-1)> over 60 sec <<![> t <<![> 130 sec, and then the peak of scattered light at k= <k_m> increases sharpness and shifts to smaller k with time in the range of t <>![> 190 sec.2) For <C_(12)> <E_5> -W at T- <T_c> <-![> 1 mK, I(k,t) increases in accordance with I(k,t)[ <t^(2.3)> at k=2.1 x <10^3> <cm^(-1)> for a time of t <<![> 50 sec, I(k,t)[ <t^(3.4)> at k=1.5 x <10^3> <cm^(-1)> over 50 sec <<![> t <<![> 100 sec, and then the peak of scattered light at <k_m> increases sharpness and shifts to smaller k with time in the range of t <>![> 130 sec.3. The wave length <RAMbda> (=2 <pi> /k) of concentration fluctuations in the early stage of spinodal decomposition is 26 <mu> m for PDMS-DEC at <T_c> -T <[!-> 5 mK and 29 <mu> m for <C_(12)> <E_5> -W at T- <T_c> <-![> 1 mK.

相位分离的动力学已经在上部临界混合点附近进行了研究（<t_c> = 34.42°C，<w_c> = 12.1 wt。％）的聚二甲基硅氧烷（pdms，pdms，<m_n> <-！ = 31.89°C，<w_c> = 1.20 wt。％）pentaylene gylycol十二烷基醚（<c_（12）> <e_5>）-water（w）。获得的要旨如下1。系统<c_（12）> <E_5> -W在其临界混合点附近的系统偏离了其临界点附近的流体，二进制混合物和合金的通用类别。2。当PDM-Dec和<c_（12）> <e_5> -w的临界混合物突然被带入其旋律曲线的内部，少数族裔阶段的簇逐渐增长，并且在<t_c> k <t_c> k <t_c> k <t_c> k <-T_-k！根据i（k，t）[<t^（1.5）>在动量转移时增加k = 2.5 x <10^3> <cm^（ - 1）>在T <<！[> 60 sec！[> 60 sec，i（k，t）[<t^（2.5）>时在k = <k_m>时增加清晰度，并随着时间在T <>！[> 190 sec.2）的时间内提高较小的K。 t <<！[> 50秒，i（k，t）[<t^（3.4）> at k = 1.5 x <10^3> <cm^（ - 1）>在50 sec <<！[> t <<！[> 100 sec）中，然后在<k_m>上散射光的峰值增加了敏锐度，并随着时间的范围而移到较小的k范围内t <> 130 sec。波长的波长<rambda>（= 2 <pi> /k）的浓度波动在旋律分解的早期阶段为26 <mu> m，对于<t_c>> <t_c> -t <[！ - > 5 MK和29 <mu> m的PDMS-dec，对于<c_（12）> <ec_5> <ec_5> <ec_5> <e_5> <e_5> <mu> m

项目成果

浜野賢治: Physical Review A. 33. 485-489 (1986)

Kenji Hamano：物理评论 A. 33. 485-489 (1986)

浜野賢治: Physical Review A. 32. 3168-3171 (1985)

Kenji Hamano：物理评论 A. 32. 3168-3171 (1985)

Kenji Hamano: "Dynamics of Concentration Fluctuations for a Micellar Solution" Physical Review Letters. 55. 1472-1475 (1985)

Kenji Hamano：“胶束溶液浓度波动的动力学”物理评论快报。

Kenji Hamano: "Critical Behaviors in the Two-Phase Region of a Micellar Solution" Physical Review A. 32. 3168-3171 (1985)

Kenji Hamano：“胶束溶液两相区域的临界行为”物理评论 A. 32. 3168-3171 (1985)

Kenji Hamano: "Dynamics of Concentration Fluctuations along the Coexistence Curve of a Binary Mixture" Physical Review A. 33. 485-489 (1986)

Kenji Hamano：“沿二元混合物共存曲线的浓度波动动力学”物理评论 A. 33. 485-489 (1986)