Preparations and Characterizations of PDMS/PEO-Grafted Polyamide and Poly(amide-imide)

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Polydimethylsiloxane and poly(ethylene oxide) randomly grafted polyamide (PA-g-SE) and poly(amide-imide) (PAI-g-SE) were prepared by a macromonomer method, and the effect of the backbone structure on the thermal property and the solubility of the graft copolymers was investigated. Glass transition temperature (Tg) of PAI-g-SE was observed in the range of 160 - 170°C, whereas Tg of PA-g-SE was not observed in the range of 0 - 300°C. The obtained PAI-g-SE was soluble in some solvents such as DMSO, DMF, THF and chloroform, whereas PA-g-SE was soluble only in NMP just after precipitation when it was swollen in methanol. In addition, the solubility of PAI-g-SE was depended on the components, where the affinity of polymer against THF and chloroform increased with the increase of PDMS content in the polymer.
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