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首页> 外文期刊>Journal of Applied Polymer Science >Melt/solution processable polyaniline with functionalized phosphate ester dopants and its thermoplastic blends
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Melt/solution processable polyaniline with functionalized phosphate ester dopants and its thermoplastic blends

机译：熔融/可溶液加工的聚苯胺与官能化的磷酸酯掺杂剂及其热塑性混合物

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摘要

Polyaniline (PANI) was doped with five novel dopants, 3-pentadecylphenylphosphoric acid (PDPPA), pentadecylphenyl(bis)phosphoric acid [PDP(bis)PAI, monocardanylphosphoric acid (MCPA), dicardanylphosphoric acid (DCPA), and phosphorylated cashew nut shell liquid prepolymer (PCNSL) and the doping behavior was studied. All dopants were synthesized from inexpensive naturally existing monomers [obtained from cashew nut shell liquid (CNSL)] having a long hydrophobic hydrocarbon side chain in the meta position of the aromatic ring. These dopants can act as plasticizing cum protonating agents for PANI so that free-standing films of PANI could be prepared by both thermal processing and solution processing techniques. Protonatiun was performed either by mechanical mixing of emeraldine base and the dopant or by an in situ doping emulsion polymerization route using xylene or chloroform as the solvent. Further, conductive flexible blends of the protonated PANl with poly(vinyl chloride) (PVC) were also prepared and studied for their conductivity and related properties. The PANI-PDPPA complex obtained by the in situ doping emulsion polymerization route exhibited an exceptionally high degree of crystalline order and orientation. A maximum conductivity value of 1.8 S cm(-1) was obtained for a PANI-PDPPA film hot-pressed at 120 degreesC. On the other hand, dopants based on cardanol having an unsaturated side chain gave only lower values. This was understood to be due the capability of the saturated analog to contribute to the ordered arrangement of PANI, thus improving the crystallinity. The conductivity values further decreased when bulky/oligomeric dopants such as PCNSL were used. The thermoplastic blends with PVC exhibited an exceptionally low-level percolation threshold because of the plasticizing nature of the dopants, The doped polymers and blends were characterized by FTIR and W-visible spectroscopic methods, four-probe conductivity measurements, XRD, SEM, TGA, and DSC. (C) 2001 John Wiley & Sons, Inc. [References: 58]
机译：聚苯胺（PANI）掺杂有五种新型掺杂剂，3-十五烷基苯基磷酸（PDPPA），十五烷基苯基（双）磷酸[PDP（bis）PAI，单心烷基磷酸（MCPA），二心烷基磷酸（DCPA）和磷酸化的腰果壳液研究了预聚物（PCNSL）的掺杂行为。所有掺杂剂均由廉价的天然存在的单体合成而成[从腰果壳液（CNSL）获得]，该单体在芳环的间位具有长的疏水性烃侧链。这些掺杂剂可以用作PANI的增塑质子化剂，因此可以通过热处理和溶液处理技术制备PANI的独立膜。通过机械混合翡翠碱和掺杂剂或通过使用二甲苯或氯仿作为溶剂的原位掺杂乳液聚合路线来进行质子化。此外，还制备了质子化的PAN1与聚（氯乙烯）（PVC）的导电柔性共混物，并研究了它们的导电性和相关性能。通过原位掺杂乳液聚合路线获得的PANI-PDPPA配合物表现出异常高的结晶度和取向度。对于在120摄氏度下热压的PANI-PDPPA薄膜，获得的最大电导率为1.8 S cm（-1）。另一方面，基于具有不饱和侧链的腰果酚的掺杂剂仅给出较低的值。可以理解这是由于饱和类似物有助于PANI的有序排列，从而提高了结晶度。当使用诸如PCNSL的大体积/低聚掺杂剂时，电导率值进一步降低。由于掺杂剂的可塑性，热塑性塑料与PVC的共混物表现出极低的渗透阈值。掺杂的聚合物和共混物通过FTIR和W可见光谱法，四探针电导率测量，XRD，SEM，TGA，和DSC。 （C）2001 John Wiley＆Sons，Inc. [参考：58]

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