Graft coupling

Figure 19 shows the graft coupling efficiency of PS as a function of the PS/PVAc ratio in the feed and of the reaction time. It is seen that the graft coupling efficiency is in the vicinity of 0.4, irrespective of the polymer mixing ratio and of the Mn of PS-COC1. [Pg.76]

By applying the theoretical consideration described elsewhere to the polymerization of styrene in the presence of TCAC, we can predict that about 90% of the PS molecules must have terminal acyl chloride groups. Therefore, the finding that the graft coupling efficiency is lower than 0.9 would be the result of the disappearance of acyl chloride groups by hydrolysis due to trace amounts of water in the coupling medium. [Pg.76]

PA/ABS Monsanto Triax 1000 Graft-coupling Crystalline/ Amorphous... [Pg.1026]

Elastomers (functionalized EPR, acrylate rubbers, etc.) Improve notched Izod impact strength Shift ductile brittle transition to lower temperatures Graft-coupling reaction... [Pg.1065]

Polyphenylene ether, PPE Improve DTUL (at 1,83MPa), unfilled Improve strength and creep resistance Reduce moisture sensitivity (better strength and stiffness retention with humidity) Graft-coupling reaction... [Pg.1065]

PA/ABS Syrolution Terblend N Graft-coupling Crystalline/ amorphous... [Pg.1740]

PA/Elastomer DuPont BASF EMS Zytel ST801.FN Ultramid 8350, 8351, 8254 A28, BT40X Graft-coupling Polar interactions Crystalline/ amorphous... [Pg.1740]

PA/Polypropylene Techmer Lehvoss Luvotech J75 Graft-coupling Crystalline/ crystalline... [Pg.1740]

Equation 19.1 Polyamide graft coupling reaction with maleic anhydride modified SAN ot ABS... [Pg.1773]

Equation 19.3 Graft-coupling cross-linking reactirms in functional acrylate rubber blends... [Pg.1798]

Elastomers (functionalized EP Improve PA s notched Izod impact Graft-coupling... [Pg.1801]

Polyolefins (LDPE, PP) Lower cost Improved dimensional stability with humidity Graft-coupling reaction... [Pg.1801]

Equation 19.6 Graft-coupling reactions in polyamide blends with a mixture of epoxy and carboxy functional elastomer blends... [Pg.1809]

As demonstrated above, polymer micropatterned with plasma or UV irradiation can be used without any further treatment for cell culture application. However, functional groups created at the modified surface can be subsequently used for the selective graft coupling of biomolecules, suitable for cell adhesion enhancement [62]. [Pg.86]

High energy irradiation induced graft coupled with melt compounding... [Pg.113]

Exhaustive solvent extraction of the extruder blended products with triflouroethanol (TFE), a polyamide solvent, indicated that a substantial amount of unextractable PA6 was usually bound to the reactive rubbers via the graft-coupling reactions. In the case of PA6/ maleated EPR (80/20) blend, >20% of PA6 is bound to the rubber as a graft copolymer. In the case of the PA6 blend compounded with 20% zinc ionomer of ethyiene-methacrylic acid copolymer (E-MAAZn), the TFE extraction indicated only <3% bound PA6. However, the blend showed a moderate torque increase in the Rheomixer experiment. These results indicate that the E-MAAZn ionomer does not bond covalently with the polyamide chains, but more likely interacts via a simple associative interaction occurring at the interface. [Pg.219]

PA6 by phosphotungstic acid, showed an average particle size of >0.3 p, with many particles containing some occluded or penetrated polyamide, presumably graft-coupled to the rubber (Fig. 8.12). It is believed that such occlusions may actually facilitate the... [Pg.229]

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