Studies on the Effect of Reactive Polypropylene on the Properties of Filled Polyolefin Composites. Part 1. Advantages of Solid-Phase-Grafted Maleated Polypropylene Over Melt-Phase-Modified Polymers

Abstract

The results summarize the problem associated with grafting of maleic anhydride (MAH) on polypropylene (PP) in the melt phase and also describe a new method for grafting PP with MAH in the solid phase. The effectiveness of the solid phase modified maleated polypropylene (MAH-PP) as interphase modifier has been 290 KHUNOVA AND ZAMORSKY documented by comparing the properties of calcium carbonate filled polypropylene composites (PP-CaC03) treated with solid phase modified MAH-PP with that of the melt phase modified MAH-PP treated composites. The solid-phase modification of PP by MAH is nontoxic and is also free from unreacted MAH. The modifier also improves the tensile strength and impact resistance of unmodified PP-CaC03 composites.

Grafting of maleic anhydride onto polypropylene by reactive processing. I. Effect of maleic anhydride and peroxide concentrations on the reaction

“…Investigations regarding such reactions have been carried out in equipment like torque rheometers, 1,3,[7][8][9] single screw extruders, 10 -12 and in twin screw extruders. 7,13,14 The organic peroxides are thermally unstable and undergo homolytic scission at the oxygen-oxygen bonds to form primary radicals at the processing conditions used.…”

“…However, its potential applications like matrix for reinforced materials, blends, and metal coating, have been harmed by its apolar nature, which make it incompatible with metals, inorganic fillers, and polar polymers. [1][2][3] With the aim to obtain satisfactory performance in incompatible blends and in polypropylene composites containing inorganic fillers, PP modified with maleic anhydride (PP-g-MA) has been introduced into these systems as a third component. 4 -6 Among the possible routes of obtaining PP-g-MA reactive processing is worth mentioning, due to obtaining facility and low cost.…”

Performance evaluation of synthesized acrylic acid grafted polyethylene in aluminum hydroxide highly filled polyethylene composites

“…4,5 Functional polymeric agents have the ability to strongly interact with both filler and polymer matrix, inducing a significant improvement in mechanical properties. 6,7 In addition, it is quite necessary to understand the modifying mechanisms of particulate-filled PE to design and develop an advanced linear low-density polyethylene (LLDPE)/Al(OH) 3 composite with good mechanical performance and processibility.…”

Thermal properties and flame retardance of Al(OH)3/polypropylene composites modified by polypropylene grafting with acrylic acid

“…In the PP composites containing Mg(OH) 2 fire retardant filler, improvements in flame retardance and mechanical properties of PP composites have been observed by the addition of functionalized polymers. 34,[37][38][39][40] Although the effect of the filler surface treated by coupling agents with low molecular weight on physical and mechanical properties of Al(OH) 3 /PP composites have been investigated, [41][42][43][44][45] few studies on the surface treatment of Al(OH) 3 by a macromolecular coupling agent, functionalized polymer, were reported in the Al(OH) 3 /PP composites. In our laboratory, PP functionalized with AA was 46 In this article, the FPP with different grafting rates were blended with PP and Al(OH) 3 .…”