Clay modification by using PDPhS. Evaluation on HDPE

F. MONASTERIO1, MA. CARRERA, E. ERDMANN, V.J.R.R. PITA, M. L. DIAS, H. DESTÉFANIS

Guarujá - San Pablo - Brasil

Simposio; VII Encontro da SBPMAT; 2008

Organic polymers and nanolayers inorganic nanocomposites of montmorillonite are studied to investigate their structure and the influence of a few weight percent loading of clays in polymer macroscopic properties, since they make of modified polymer a potential material in commercial applications. The aim of this work is to compare the behavior of HDPE hybrids modified with different clays. Sodium montmorillonite clay (MNa) was used as raw material. After cationic interchange with CH3(CH2)15N+(CH3)33(CH2)15N+(CH3)3 ion, organophilc clay was obtained (MH). Then two monomers were added to MH: (CH3)2SiCl2 y (CH3)2Si(OCH3)2. Finally, in situ polymerization was carried out to obtain polydiphenilsiloxane (PDPhS) into interlamellar galleries. The following modified nanoclay were obtained: MH_PDPhS(Cl) and MH_PDPhS(Met). HDPE/clay mixing was performed using melt compounding processing in a Haake torque rheometer Rheocord 9000 equipped with a mix chamber and roller rotors at 100 rpm and 190°C X-ray results show interlamellar changes when PDPhS is incorporated. FTIR spectra show that the same PDPhS product is obtained in situ polymerization from the two modified clays. SEM photographs exhibits some changes between MH_ PDPhS(Cl) y MH_PDPhS(Met). This could be due to different media of reaction during in situ polymerization. Mechanical properties were studied to analyze the HDPE/nanoclay interaction.3)2SiCl2 y (CH3)2Si(OCH3)2. Finally, in situ polymerization was carried out to obtain polydiphenilsiloxane (PDPhS) into interlamellar galleries. The following modified nanoclay were obtained: MH_PDPhS(Cl) and MH_PDPhS(Met). HDPE/clay mixing was performed using melt compounding processing in a Haake torque rheometer Rheocord 9000 equipped with a mix chamber and roller rotors at 100 rpm and 190°C X-ray results show interlamellar changes when PDPhS is incorporated. FTIR spectra show that the same PDPhS product is obtained in situ polymerization from the two modified clays. SEM photographs exhibits some changes between MH_ PDPhS(Cl) y MH_PDPhS(Met). This could be due to different media of reaction during in situ polymerization. Mechanical properties were studied to analyze the HDPE/nanoclay interaction.