Polypropylene elastomer

Rieger B, Troll C, Preuschen J (2002) Ultrahigh molecular weight polypropylene elastomers by high activity dual-side hafnocene catalysts. Macromolecules 35 5742-5743... 

The Ziegler-Natta catalysts have acquired practical importance particularly as heterogeneous systems, mostly owing to the commercial production of linear high- and low-density polyethylenes and isotactic polypropylene. Elastomers based on ethylene-propylene copolymers (with the use of vanadium-based catalysts) as well as 1,4-cz s-and 1,4-tran.y-poly(l, 3-butadiene) and polyisoprene are also produced. These catalysts are extremely versatile and can be used in many other polymerisations of various hydrocarbon monomers, leading very often to polymers of different stereoregularity. In 1963, both Ziegler and Natta were awarded the Nobel Prize in chemistry. 

Non-discoloring, sulfur containing phenolic antioxidant and stabilizer that provides long-term heat stability by preventing thermo-oxidative degradation. Used for the process stabilization of polyethylene wire and cable resins for polyethylene during extruder compounding. Can also be applied in styrenic polymers, polypropylene, elastomers such as EPDM and SBR and for carboxylated SBR latex, polybutadiene rubber and polyisopropene rubber. 

SP27 pump Traditional pump design, compatible with wide range of nasal applicators for paediatric, adult or geriatric use. Airless/preservative-free systems also available. Acetal, polyethylene, polypropylene, elastomer, stainless steel (contact] Typical dose 50, 70, 100, 130 pL For 200 X 100 pL doses (example] volume = 102.8 pL 4.2°/o (distilled water]... 

Table 15.13. Key properties of commercial thermoplastic elastomer blends based on polypropylene/elastomer dynamic vulcanizates...

Kolarik, J. Jancar, J. (1992). Ternary composites of polypropylene/elastomer/caldum carbonate effect of functionalized components on phase structure and mechanical properties. Polymer, vol.33, pp.4%1-4%7. ISSN 0032-3861... 

Ma,C.G. Mai, Y.L. Rong, M.Z. Ruan, W.H. Zhang M.Q. (2007). Phase structure and mechanical properties of ternary polypropylene/elastomer/nano-CaCOs composites. Composites Science and Technology, vol.67, No.l4, pp.2997-3005, ISSN ... 

Premphet, K. Horanont, P.(2000). Polymer, Phase structure of ternary polypropylene /elastomer /filler composites effect of elastomer pxrlarity. Polymer, 41, 9283-9290,... 

Polypropylene homopolymer, polypropylene copolymer, and a polypropylene elastomer blend (TPO) were melt compounded with 2.0,4.0, and 6.0 wt% additive. Additional tests with additive levels of 0.5,1.0 wt, and 1.5 wt% were made with Struktol TR-016. HiMod-360 mica was used at 30 wt% levels in all formulations, and there was a constant 0.2 wt% level of a stabilizer package in each compound. The maleic anhydride-modified polypropylene most effective in increasing performance properties was Unite MP-1000, but many other similar products made by a variety of companies performed nearly as well. To select the very best product, one must consider the relative costs of such additives and required use levels. 

MartusceUi E. (1995) Structure and properties of polypropylene-elastomer blends, in Polypropylene - Structure, Blends and Composites, 1st edn, (ed. J. Karger-Kocsis), Chapman Hall, London, Vol. 2, pp. 95-140. 

Front bumper of 1979 Citroen Visa, in polypropylene/elastomer blend (courtesy ICl). 

Polypropylene/elastomer (e.g. EPDM)/filler/interfacial additive. 

Kai ger-Kocsis J and Kiss L (1987) Dynamic mechanical properties and morphology of polypropylene block copolymers and polypropylene/elastomer blends, Polym Eng Sci 27 254-262. 

Chlorinated polyolefins are used as adhesion promoters for coatings and inks on polyolefin plastics. They can be used as primers on polyethylene, polypropylene, or thermoplastic polyolefins (polypropylene-elastomer blends). They are used for the adhesion of paint to plastic surfaces in the automotive industry. 

Zhang L, Li C, Huang R. Toughness mechanism of polypropylene/elastomer/filler composites. / Polym Sci Polym Phys Ed2005 43(9) 1113-1123. 

High modulus TPO formulations typically consist of three general components polypropylene, elastomer, and filler. To create an optimal product a design of experiments (DOE) was conducted using the following independent variables ... 

Figure 5. Measured interface thickness as a function of the difference in solubility parameter for each polypropylene/elastomer pair. The line is drawn to guide the eye. Error bars show the standard deviation, in the measured value of the interface thickness, from analysis of at least three different images.

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