A series of P(EMA-GMA)/SiO2 hybrid polymeric materials

in which there are chemical bonds between the organic component and the inorganic component

were prepared by the sol-gel process.The structure of the materials was measured by IR.It shows that C—N bonds were formed between the organic and inorganic components according to the appearence of the absorption peak at 1250cm-1 in the spectra of the product and never in those of the reacting substance.The effect of the inorganic content on the thermal behavior of materials was investigated by DSC.The results demonstrate that the values of Tg and feasible temperature increased with increasing of the inorganic component.In the same time

each sample displays a single value of Tg

it may be attributed to the little phase separation in the materials.The morphology of hybrid polymeric materials was determined by means of TEM and SAXS.From theoretical calculation of parameters a1

a/2

Ssp

liand l。with the Guinier and the Debye equations and TEM analysis

the regulation effect of the inorganic content and acid content on the compatibility of the two components was concluded.The results show that the material possesses a wonderful compatibility when the molar ration of 3-aminopropylsilane (APTES) and copolmer is 1:1and the acid content is 1.5%(Vol%).The relationship between the transparency of the hybrid materials and the reaction conditions was also discussed.