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The blends with ABS1 + ABS2 show no changes in the FTIR spectra, because the chemical composition of the two materials is identical.
In case of ABS1+ABS2 blends, the fracture mechanism is similar to ABS1 because of the excellent compatibility between ABS1 and ABS2.
Heat Melt deflection Density (g/ flow index temperature Rockwell [cm.sup.3]) (g/10 min) ([degrees]C) hardness ABS1 1.40 45.0 86.0 109.0 ABS2 1.40 33.6 89.3 111.7 MABS 1.11 11.5 88.0 116.0 HIPS 1.04 6.4 79.0 82.3 TABLE 2.
All three polybutenes were found to have good compatibility with ABS1, up to a concentration of 7.5 pph.
The room-temperature impact strength results obtained by modifying ABS1 with polybutene [ILLUSTRATION FOR FIGURE 1 OMITTED] show that a 30% improvement can be achieved using polybutenes of either 400 or 950 mw at levels of 4 to 7.5 pph.
Low-temperature (-40 [degrees] C) notched Izod impact properties were determined for ABS1 and selected samples of ABS2, as shown in Fig.
In ABS1, the 400-mw polybutene did not change the MFR, and the 950-mw polybutene reduced MFR slightly.
Modification of ABS1 with 4 pph of polybutene resulted in a decrease of 5% to 9% in tensile strength.
ABS1 and ABS2 were used to assess the effects on impact and tensile properties respectively, of reprocessing in the torque rheometer at different temperatures and rotational speeds (shear rates).
The notched Izod impact tests were performed (on ABS1 and ABS3) at room temperature using a Ray Ran Universal Pendulum Impact System.
The same trends were observed in the DMTA spectra of ABS1.
Absorbance ratios for different bands in the FTIR spectra of ABS1 and ABS2 are shown in Fig.
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