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We have prepared poly(ethylene terephthalate) (PET) nanocomposites filled with two different types of fumed silicas, hydrophilic (FS) and hydrophobic (MFS) silicas of 7-nm diameter, byin situ polymerization. We then investigated the morphological changes, rheological properties, crystallization behavior, and mechanical properties of the PET nanocomposites. Transmission electron microscopy (TEM) images...
A series of random copolyesters having various compositions were synthesized by bulk copolymerization of bishydroxyethyl terephthalate (BHET) with 1,4-cyclohexane dimethanol (CHDM) or dimethyl isophthalate (DMI). CHDM and DMI content was less than 10 wt%. For the synthesized copolyesters, isothermal crystallization rate, melting behavior, and equilibrium temperature were investigated by calorimetry...
The random and block copolyesters of poly(ethylene 2,6 naphthalate) (PEN) and poly(ethylene terephthalate) (PET) are synthesized and studied by 1 H-n.m.r., DSC, X-ray. The block length decreases and the degree of transesterification increases at a similar composition ratio. The melting point depressions occur with increasing the content of the other component, and melting peaks disappear at...
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