For a given draw ratio, the draw stress required to draw the blends is very much less than the stress required to draw material A to similar draw ratio, implying that the amount of work done to draw the blends through the die is comparatively less than for the polypropylene homopolymer
Hence, it is probably molecularly dispersed at the PS/PB interface owing to the miscibility of its blocks with the corresponding homopolymer
in the blend, and its addition leads to finer dispersion of the minor PB phase.
To injection mold a large, heavy-wall structural foam part, a blend containing 10% Daploy in a 12-MFR homopolymer
was shown to reduce cycle time from 102 to 80 seconds and part weight from 21 to 19.8 lbs.
2) Film Extrusions: The dried pellets of the homopolymer
and copolymers were physically mixed in the appropriate amounts to form the compositions listed in the examples.
Figure 1 shows the results of room temperature measurements on unmodified nylon-6 homopolymer
[TABULAR DATA FOR TABLE 1 OMITTED] (Allied Corp.), two copolymer/homopolymer blends and the pure nylon-6/PDMS diblock copolymer which was synthesized in our laboratory.
Basell has two new grades of Metocene mPP homopolymers
for injection molding, both of which are nucleated and have very narrow molecular-weight distribution.
It is also effective in filled and unfilled PP homopolymers
A nylon-6 glass transition ([T.sub.g]) is observed at 52 [degrees] C in compression-molded nylon-6 homopolymer
. In samples containing both nylon-6 and LDPE, the nylon-6 [T.sub.g] is obscured by a secondary crystallization shoulder of the LDPE melting peak.
(formerly BP Amoco Fabrics) is testing its Curv homopolymer
PP tape in woven fabric, which is compacted by a patented process into sheet that can then be thermoformed.
PP1: A low-molecular weight propylene homopolymer
with an intrinsic viscosity of 0.89 dl/g in a tetralin solution at 135[degrees].
PET, as produced, has little melt strength and is difficult to process on conventional three-roll stacked sheet lines and cast film lines.