isotactic polypropylene
11Ziegler-Natta catalyst — A Ziegler Natta catalyst is a reagent or a mixture of reagents used in the production of polymers of 1 alkenes (α olefins). Ziegler Natta catalysts are typically based on titanium compounds and organometallic aluminium compounds, for example… …
12Tacticity — (from Greek taktikos : of or relating to arrangement or order) is the relative stereochemistry of adjacent chiral centers within a macromolecule [ Introduction to polymers R.J. Young ISBN 0412221705 ] . The practical significance of tacticity… …
13Polystyrene — For other uses, see Polystyrene (disambiguation). Expanded polystyrene packaging …
14Polyhydroxybutyrate — (PHB) is a polyhydroxyalkanoate (PHA), a polymer belonging to the polyesters class that was first isolated and characterized in 1925 by French microbiologist Maurice Lemoigne. PHB is produced by micro organisms (like Alcaligenes eutrophus or… …
15Prolene — is a synthetic, nonabsorbable polypropylene suture. It is indicated for skin closure and general soft tissue approximation and ligation. Its advantages include high tensile strength, minimal tissue reactivity, and slipperiness (allowing easy… …
16ThermoPlastic Olefin — (TPO) is a trade name that refers to polymer/filler blends usually consisting of some fraction of PP (polypropylene), PE (polyethylene), BCPP (block copolymer polypropylene), rubber, and a reinforcing filler. Common fillers include, though are… …
17Polymer — Appearance of real linear polymer chains as recorded using an atomic force microscope on surface under liquid medium. Chain contour length for this polymer is 204 nm; thickness is 0.4 nm.[1] A polymer is a large molecule (macromolecule …
18Glass transition temperature — The glass transition temperature, T g, is the temperature at which an amorphous solid, such as glass or a polymer, becomes brittle on cooling, or soft on heating. More specifically, it defines a pseudo second order phase transition in which a… …
19Glass transition — The liquid glass transition (or glass transition for short) is the reversible transition in amorphous materials (or in amorphous regions within semicrystalline materials) from a hard and relatively brittle state into a molten or rubber like state …
20atactic — adjective Etymology: International Scientific Vocabulary 2a + tactic Date: 1957 of, relating to, or being a polymer exhibiting no stereochemical regularity of structure < atactic polypropylene > compare isotactic …
