Polypropylene impact

Stehling F.C., Huff T., Speed C.S., and Wissler G. Stmeture and properties of mhher modified polypropylene impact blends, J. Appl. Polym. Sci., 26, 2693, 1981. 

Chem. Descrip. Anhydride-modified polypropylene impact copolymer CAS 900 074)... 

The numerical analysis by means of the FEM is a tool to provide solutions to the paoblems described. This numerical technique has been used and validated in previous studies (Martin et al, 2007). In these paevious studies, reliable results were obtained in polypropylene impact. 

Hyperfom HPN 210 M is a new nucleating agent for injection molded high-density polyethylene apphcations. It improves mechanical performance to the levels approaching those of polypropylene impact copolymers. It increases stiffness by up to 50%, heat distortion temperature by 10-40°C, and productivity. It has ability to create lamellar crystal orientation of PE in the polymer flow direction reducing shrinkage. ... 

A hot melt adhesive composition made from polypropylene copolymer or polypropylene impact copolymer, a polyolefin elastomer, a low density polyethylene, a tackilying resin, a plasticizer, and a nucleating agent The 0.2 to 1 wt% of nucleating agent is... 

Some of the useful information derived from DSC heating scans includes the melting temperature, which is taken as the maximum of the endothermic peak, and the heat of fusion, determined by integrating the area under the endothermic peak. The melting temperature of PP homopolymer is about 160°C, whereas that of usual PP random copolymers is about 145°C. Polypropylene impact copolymers exhibit the same melting temperatures as homopolymers, the rubber constituent not affecting the melting temperature. Impact copolymers do, however, have lower heats of fusion than homopolymers because the heat of fusion is related to the proportion of crystalline polymer present. The rubber portion is essentially noncrystalline and therefore does not melt. 

Acctuf, Polypropylene impact copolymer, Amoco Polymers... 

An important example of a polymer is that of polyvinylchloride, shown in Figure 9.15. This polymer is synthesized in large quantities for the manufacture of water and sewer pipe, water-repellant liners, and other plastic materials. Other major polymers include polyethylene (plastic bags and milk cartons), polypropylene (impact-resistant plastics and indoor-outdoor carpeting), polyacrylonitrile (Orion and carpets), polystyrene (foam insulation), and polytetrafluoroethylene (Teflon coatings and bearings) the monomers from which these substances are made are shown in Figure 9.16. 

There are many other commercial examples of polymer blends. Polycarbonate can be blended with an acrylonitrile-butadiene-styrene terpolymer to give a PC-ABS blend. Polypropylene impact can be improved by the addition of ethylene-propylene copolymers, which are sometimes called ethylene-propylene-rubber (EPR). Ethylene, propylene, and a diene monomer (EPDM), such as ethylidene norbomene, is also used to impart impact and flexibiUty to polypropylene. 

Deeiiadayalan E, Vidhate S and Lele A (2006) Nanocoinposites of polypropylene impact copolymer and organoclays Role of compatibilizers, Polym Intern 55 1270-1276. Deshmane C, Yuan Q and Misra R D K (2007) High strength-toughness combination of melt intercalated nanoclay-reinforced thermoplastic olefins, Mater Sci Eng A460-461.-277-287. 

Figure 20 Applications and markets of polypropylene impact copolymers. Source Phillip Townsend Associates.

Rubber modified polypropylene polypropylene/ethylene propylene rubber blends ethylene propylene rubber, polypropylene blends elastomer modified thermoplastic elastomer modified polypropylene impact modified polypropylene olefin thermoplastic elastomer thermoplastic polyolefc rubber. 

Substrates Polypropylene impact copolymer nominal MFl 35 dg/min and high-density polyethylene nominal MFl 18 dg/min. were used. 

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