Download PDF by L. A. Utracki: Clay-Containing Polymeric Nanocomposites Volume 2

By L. A. Utracki

This is often half 2 of a half set. half 1 ISBN is 1859574823

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65 wt% of poly-DAAM was extracted by MeOH, without change in the interlayer spacing. Compounding the adduct with PP produced exfoliated CPNC containing: 3 wt% clay, 2 wt% poly-DAAM, 5 wt% PP-MA and 90 wt% PP. The authors did not postulate the mechanism responsible for the good dispersion of individual clay platelets, but the key clearly was the presence of poly-DAAM. The high concentration of polar side groups (amide and ketone) provided an intermediate interacting layer between the clay platelet and PP-MA.

9 24 0 1. 6 24 4 6. 2 2. 3 0 Notes: ME = synthetic clay, Somasif ME-100; MMT = Kunipia-F; m = melamine; mc = melamine cyanurate; 2M2ODA = dimethyl-di-octadecyl ammonium chloride; 2x = twice stoichiometric The similarity of approaches used by Inoue et al. [2002] and by Yasue et al. [1995] is noteworthy – there is no effort to secure high polymer-clay interaction that may lead to exfoliation. The small enhancement of the mechanical properties for both cases suggests intercalation. The ease of preparation of these materials and their good processability makes them industrially attractive.

1 47 67. 7 0. 7 0. 5 2. 1 Dimens. 8 H2O Absorp. 1 M3 M2 Nil FM clay M1 PA-6 Polymer Table 66 Continued... 5. 0 42 66. 7 0. 5 2. 0 M6 Clay-Containing Polymeric Nanocomposites Thermoplastic CPNC Figure 143 Properties of PA-6 comprising 5 wt% of FM: M1 to M6. For explanation see text and data in Table 66. Properties are (from the LHS): relative viscosity (ηr); tensile strength (σ); elongation at break (εb); notched Izod impact strength (NIRT); and heat deflection temperature (HDT). It is evident that incorporation of FM improved the tensile strength, HDT, dimensional stability and reduced the water absorption.

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