Polypropylene-graft-poly

Oh SJ, Jung JC, Zin WC (2001) Synthesis and surface property variations of polypropylene-graft-poly(eth-ylene glycol). J Colloid Interface Sci 238 43 7... 

It has been found that, for a fixed mineral filler content, the viscosity of PMF-based composites increases when the coat is made of polyethylene [164, 209, 293], poly(vinyl chloride) [316] and polypropylene [326, 327], The picture was different, however, for composites based on the ethylene/vinyl acetate copolymer to which kaolin with grafted poly (vinyl acetate) was added [336]. Addition of PMF with a minimum quantity of grafted polymer results in a sharp drop of flowability (rise of viscosity), in comparison to addition of unmodified filler but with a further increase of the quantity of grafted polymer the flow gradually increases and, depending on the kaolin content and quantity of grafted polymer, may even become higher than in specimens with unmodified filler, for equal concentrations. 

The concept of PO macroinitiators centers on the introduction of an initiation moiety into an olefinic polymer chain for polymerization. The most effective route for preparing PO macroinitiators is by employing functional polyolefins containing hydroxyl groups or other reactive groups. These functional POs are prepared by copolymerization of olefins with functional monomers and post-polymerization reaction, as mentioned above. In the case where an initiation moiety was at the chain-end of the polyolefins, a block type copolymer is produced. It has been reported that thiol-terminated PP was used as polymeric chain transfer agent in styrene and styrene/acrylonitrile polymerization to form polypropylene-b/odc-polystyrene (PP-b-PS) and polypropylene-btock-poly(styrene-co-acrylonitrile) (PP-b-SAN) block copolymer [19]. On the other hand, polymer hybrids with block and graft structures can be produced if initiation moieties are in the polymer chain. 

Porous acrylonitrile—DVB copolymer further reacted with diamines or triamines provides a support for Cp 2ZrCl2—MAO catalysts.2 2 pjjg catalyst activity rivals that of silica-supported analogues and no adhesion of polymer to the reactor walls or stirrer was observed. Polypropylene grafted with maleic anhydride allowed to react with MAO acts as a support for a variety of metallocenes. 3 The number of gels in the polymer is lower than when silica is used as the carrier. Porous vinylpyridine—DVB and poly(vinyl chloride) have also been reported as suitable support materials for metallocene catalysts. 

Polypropylene-graft-maleic anhydride. See Propylene/MA copolymer Poly (propylene oxide). See Polypropylene glycol... 

PP-g-MA Polypropylene grafted maleic anhydride pph Parts per hundred PPO Polyphenylene oxide PPS Poly (p-phenylene sulfide)... 

Simultaneous influence of polypropylene-graft-maleic anhydride (MAPP) and silane-treated hemp fibers (HF) on morphology, thermal and mechanical properties of high-flow polypropylene (PP) modified with poly[styrene-b-(ethylene-co-butylene)-b-styrene] (SEBS) was studied. Thermal stability of HF was improved... 

Polypropylene com.) poly(acenapthylene-alt-MA) grafted, 474 poly(l,l-diphenylethylene-alt-MA) grafted, 474 poly(indene-alt-MA) grafted, 474 poly(styrene-alt-MA) grafted, 473, 474 SMA resin modified, 444 Poly(propylene-alt-MA), 338-340, 586 amine reactions, 434 applications, 449, 586... 

In situ polymerisation of the polymer matrix is an attractive method of preparing graphene-based composites although often solvents are used to reduce the viscosity of the dispersions. For example, intercalative polymerisation of methyl methacrylate and epoxy resins has been achieved with graphene oxide to produce nanocomposites with enhanced properties. It has also been possible to use in situ polymerization produce polyethylene- and polypropylene-matrix graphene oxide nanocomposites. The technique of grafting poly(methyl methacrylate) chains onto graphene oxide has also been employed to make the filler compatible with the polymer matrix. " ... 

Lai et al. [29] discussed this issue for a polypropylene nanocomposite using as compatibilizers polypropylene grafted maleic anhydride (PP-g-MA) and poly-ethylene-octene elastomer grafted maleic anhydride (POE-g-MA). Another aspect is related to system crystallinity and its morphology. The optical transmittance for nanocomposite without compatibilizers was generally higher than that of the translucent PP resin. 

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