首页|PVME/PS共混体系相分离行为的液态簧振动力学谱的研究

PVME/PS共混体系相分离行为的液态簧振动力学谱的研究

Study on Vibrational Mechanical of Liquid Spring for Phase Separation Behavior of PVME/PS Blends

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本研究利用自制的液态簧振动力学谱(RMS-L)技术研究了聚甲基乙烯基醚/聚苯乙烯(PVME/PS)二元共混物的玻璃化转变及相分离动力学过程,并选取了不同质量比样品,对每个样品从低温至高温的升降温循环测量.结果表明:(1)RMS-L方法可以灵敏地对不同混合比例的高分子共混体系玻璃化转变和相分离过程进行实时检测;(2)以纯PVME和纯PS玻璃化转变温度为基础,从11组待测样品中挑选组分比为5∶5的样品进行了分析,发现样品的玻璃化转变温度随着组分的变化而变化.而当温度达到某一点时样品会发生相分离.(3)当样品经过第二次升温时发现共混体系的玻璃化转变温度及相分离温度点均有变化,这说明在经过一次升温后样品已经被分为新的相;(4)结合不同比例样品的力学谱结果,发现共混体系相分离行为对时间和温度具有一定的依赖性,并且通过这种规律分析了高分子共混物相分离的动力学行为.
In this study,the dynamic process of glass transition and phase separation of polymethyl vinyl ether/polystyrene(PVME/PS)binary blend was studied by means of self-made liquid spring vibration mechanics spectroscopy(RMS-L)technology.Samples with different mass ratios were selected to measure the rise and fall cycle of each sample from low temperature to high temperature.The results show that:(1)the RMS-L method can detect the glass transition and phase separation process of polymer blends with different mixing ratios in real time.(2)Based on the glass transition temperature of pure PVME and pure PS,samples with a component ratio of 5∶5 were selected from 11 groups of samples to be tested for analysis.It was found that the glass transition temperature of the samples changed with the change of components.When the temperature reaches a certain point,phase separation occurs.(3)When the sample was heated for the second time,it was found that the glass transition temperature and phase separation temperature of the blend system were changed,which indicated that the sample had been divided into a new phase after the first heating.(4)Combined with the mechanical spectrum results of samples of different proportions,it is found that the phase separation behavior of the blend system has a certain dependence on time and temperature,and the kinetic behavior of the phase separation of the polymer blend is analyzed through this law.

polymerglass transitionphase separationvibration mechanical spectrum of liquid springRMS-L method

云芳、杨世殷、郑基源、卫来

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伊犁师范大学,新疆凝聚态相变与微结构重点实验室,新疆 伊宁 835000

聚合物 玻璃化转变 相分离 液态簧振动力学谱 RMS-L方法

伊犁师范大学校级一般项目伊犁师范大学教育教学改革项目自治区研究生科研创新项目2024年度新疆凝聚态相变与微结构实验室开放课题

2021YSYB103YSYB202281XJ2019G295XJDX0912Y2403

2024

10.3969/j.issn.1007-1865.2024.012.005

广东化工
广东省石油化工研究院

广东化工

影响因子：0.288
ISSN：1007-1865
年,卷(期)：2024.51(12)