期刊
RSC ADVANCES
卷 6, 期 55, 页码 49335-49347出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra00188b
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资金
- Fondo Nacional de Desarrollo Cientifico y Tecnologico, FONDECYT [1095151]
- CONICYT [24110014, 24121175]
Two new aromatic dianhydride monomers containing R,R-diphenylsilane (R = Me or Ph), an ether group and an isobenzofuran-1,3-dione moiety in their structure were prepared and spectroscopically characterized. They were reacted with two silylated aromatic diamines, previously reported, in order to prepare four different aromatic poly(ether-imide)s (PEIs). High yields were obtained for the synthesis of these polymers with an inherent viscosity range between 0.10 and 0.27 dL g(-1), corresponding to a viscosimetric average molecular weight (M-v) from 1740 to 9520. PEIs were soluble in a variety of polar aprotic solvents. The thermal decomposition temperatures measured varied between 473 and 526 degrees C and the glass transition temperature values obtained varied from 164 to 184 degrees C. All poly(ether-imide) s were transparent in the UV-visible region. Additionally, films of these polymers were prepared by deposition of a solution through a spin coating technique; this process induces a spontaneous micropore formation on the film surface by means of quasi-instantaneous solvent evaporation. The solid samples were morphologically characterized by Field Emission Scanning Electron Microscopy (FE-SEM) and Atomic Force Microscopy (AFM). Thus, shape, distribution and dimensions (diameter and height) of the pores were studied. These parameters varied in agreement with the specific polymer characteristics: molecular weight, solubility and the nature of the R groups inserted into the molecule (phenyl group presence produces larger and deeper pores), among others.
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