Studies of sulfonated block copolymer and its blends
Studies of sulfonated block copolymer and its blends
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DOI：
10.1016/s0032-3861(00)00353-0
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发表时间：
2001-01-01
期刊：
影响因子：
4.6
通讯作者：
Acosta, JL
中科院分区：
文献类型：
--
作者：
Mokrini, A;Acosta, JL
本文报道了一种基于氢化聚苯乙烯-丁二烯嵌段共聚物（HPBS）的磺化聚合物的合成与表征。通过磺化部分聚苯乙烯嵌段制备了嵌段共聚物离聚体。研究了游离酸样品（HPBS-SH）及其与非磺化聚合物（HPBS）和聚丙烯（PP）的共混物。FTIR用于确认磺化。DMA和DSC分析表明，所有研究样品的T-g（HPB）保持恒定。通过DMA测量的聚苯乙烯（PS）的玻璃化转变温度在磺化后呈现约30 ° C的增加，当HPBS的量在HPBS-SH/HPBS共混物中增加时减小（高达13 ° C），并且随着HPBS-SH/PP共混物中PP含量的增加而增加（高达28 ° C）。复阻抗测量表明，HPBS-SH的质子电导率约为8 × 10 ~（-3）Ohm ~（-1）cm ~（-1），而在共混物中的质子电导率一般较低。用Avrami分析法研究了聚丙烯的非等温结晶过程。(C)2000爱思唯尔科技有限公司版权所有。
This paper reports the synthesis and characterization of a sulfonated polymer based on hydrogenated poly(styrene-butadiene) block copolymer (HPBS). Block copolymer ionomers were prepared through sulfonation of part of the polystyrene blocks. The free acid samples (HPBS-SH), and their blends with the non-sulfonated polymer (HPBS) and polypropylene (PP) were studied. FTIR was used to confirm sulfonation. DMA and DSC analyses have shown that T-g (HPB) remains constant for all the samples studied. Glass transition temperatures of polystyrene (PS) measured through DMA present an increase of about 30 degrees C after sulfonation, diminution (up to 13 degrees C) when the amount of HPBS increases in HPBS-SH/HPBS blends and augmentation (up to 28 degrees C) as the PP content in HPBS-SH/PP blends increases. Complex impedance measurements have shown that proton conductivity of HPBS-SH was about 8 X 10(-3) Ohm(-1) cm(-1), lower values were observed generally in the case of blends. Non-isothermal crystallization of PP was studied using Avrami analysis. (C) 2000 Elsevier Science Ltd. All rights reserved.