Order–order, lattice disordering, and order–disorder transition in SEBS studied by two-dimensional correlation infrared spectroscopy
Order–order, lattice disordering, and order–disorder transition in SEBS studied by two-dimensional correlation infrared spectroscopy
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DOI：
10.1016/j.polymer.2010.06.051
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发表时间：
2010-08
期刊：
影响因子：
4.6
通讯作者：
Tao Zhou;Z. Wu;Yunyong Li;Jiang Luo;Zhengguang Chen;Jingkui Xia;Hongwen Liang;Aiming Zhang
中科院分区：
文献类型：
--
作者：
Tao Zhou;Z. Wu;Yunyong Li;Jiang Luo;Zhengguang Chen;Jingkui Xia;Hongwen Liang;Aiming Zhang
利用红外光谱结合二维相关光谱研究了聚苯乙烯-嵌段-聚（乙烯-co-1-丁烯）-嵌段-聚苯乙烯嵌段共聚物（SEBS）在高温下的温度依赖跃迁。在100 ~ 220℃的线性升温范围内，研究了SEBS的有序-有序转变（OOT）、晶格无序转变（LDT）和有序-无序转变（ODT）。利用原子力显微镜研究了SEBS的表面形貌，并在MW2D光谱中识别了相关强度峰。OOT在152°C左右测定。LDT出现在170℃左右。ODT也在202℃左右成功测定。结果表明，- ch2 -在EB阻滞主链中的运动是OOT的关键驱动因素。在LDT中，基团的运动是同步的，SEBS分子链作为一个整体运动。在ODT中，它表明驱动因素是- ch2 -在EB块主链中的运动。
The temperature-dependent transitions of polystyrene-block-poly(ethylene-co-1-butene)-block-polystyrene block copolymer (SEBS) at high temperature were studied using infrared spectroscopy combined with two-dimensional (2D) correlation spectroscopy. The order–order transition (OOT), the lattice disordering transition (LDT), and the order–disorder transition (ODT) of SEBS were explored with a linear temperature increment ranging from 100 to 220 °C. AFM was employed to study the surface morphology of SEBS and to identify the correlation intensity peaks in the MW2D spectra. The OOT was determined around 152 °C. The LDT appears around 170 °C. The ODT was also successfully determined around 202 °C. It is gained that the key driver of the OOT is the movements of –CH2– in the main chains of EB blocks. In the LDT, the movements of groups are simultaneous and the SEBS molecular chains move as a whole. In the ODT, it shows the driver is the movements of –CH2– in the main chains of EB blocks.