Isotactic & atactic polypropylene is soluble in p-xylene at 140 °C. Isotactic precipitates when the solution is cooled to 25 °C and atactic portion remains...

mechanisms, such as polyvinyl chloride are usually atactic.[citation needed] Due to their random nature atactic polymers are usually amorphous.[citation needed]...

three types of tacticity: isotactic (all substituents on the same side), atactic (random placement of substituents), and syndiotactic (alternating placement...

(APAO; also known as atactic poly alpha olefin) is a commodity chemical used in multiple applications. In the mid-to-late-1950s, atactic polypropylene (APP)...

strong effect on the properties of the plastic. Standard polystyrene is atactic. The diastereomer where all of the phenyl groups are on the same side is...

protein, a class of proteins Amyloid-beta precursor protein, a protein Atactic polypropylene, a hot-melt adhesive App (film), a 2013 Dutch film Apps (film)...

adhesive had previously been asphalt but now is more commonly a hot-melt atactic polypropylene. Water-activated tape is used for closing and sealing boxes...

crystallization occurs much easier in isotactic than in the atactic polypropylene form. Atactic polymers crystallize when the side groups are very small...

alkyl substituents (R) is called atactic. Both isotactic and syndiotactic polypropylene are crystalline, whereas atactic polypropylene, which can also be...

polyvinyl alcohol was over one million metric tons in 2006. PVA is an atactic material that exhibits crystallinity. In terms of microstructure, it is...

rubber −70 −94 Polyvinylidene fluoride (PVDF) −35 −31 Polypropylene (PP atactic) −20 −4 Polyvinyl fluoride (PVF) −20 −4 Polypropylene (PP isotactic) 0...

which has a higher melting point and better temperature resistance), atactic polypropylene (PP or APP), polybutene-1, oxidized polyethylene, etc.),...

that chloride is located on alternating carbon centres. PVC has mainly an atactic stereochemistry, which means that the relative stereochemistry of the chloride...

its crystalline form, although in certain circumstances, for example in atactic polymers, there is no crystalline analogue of the amorphous phase. Glass...

Using metallocene 1 for polymerization of propene gives atactic polypropylene, while C2 symmetric metallocene 2 and Cs symmetric metallocene 3 catalytic...

lactone lactide. In the presence of catalysts lactide polymerize to either atactic or syndiotactic polylactide (PLA), which are biodegradable polyesters....

mixed with filler components such as limestone, sand, or polymers such as atactic polypropylene (APP) that gives rigidity and tear resistance or styrene-butadiene...

can be used to direct whether the product is syndiotactic, isotactic, or atactic. Three views of ansa-dimethylsilylhafnocene dichloride (from X-ray coordinates)...

of PMMA can also be performed. The glass transition temperature (Tg) of atactic PMMA is 105 °C (221 °F). The Tg values of commercial grades of PMMA range...

backbone are stereogenic (chiral). For this reason, polyacrylamide exists in atactic, syndiotactic, and isotactic forms, although this aspect is rarely discussed...

packing peanuts and package cushioning; Tm = 240 (only isotactic); Tg = 100 (atactic and isotactic) 3–3.5 Other (often polycarbonate or ABS) Dependent on polymers...

catalyst will determine the sequence of chirality in the chain, as in, atactic, syndiotactic, isotactic, as well as average block length, molecular weight...

Rosita Beati; a graduate in literature, she coined the terms "isotactic", "atactic" and "syndiotactic" for polymers discovered by her husband. They had two...

composition but also on the more subtle differences in microstructure. Atactic polymers consist of a random arrangement of stereochemistry and are amorphous...

branches out. Conventional polymerization of propylene oxide results in an atactic polymer. The isotactic polymer can be produced from optically active propylene...

but this does not significantly affect the melting point. The commercial atactic PVF film shows a melting point peak at 190 °C. Several transition phases...

methods in the distillation process. The two most common modifiers are atactic polypropylene (APP) from Italy and styrene-butadiene-styrene (SBS) from...

still sometimes used. Copolymers commonly used to modify asphalt include atactic polypropylene (APP), styrene-butadiene-styrene (SBS), styrene-butadiene...

the selective production of each form i.e., syndiotactic, isotactic and atactic polymer chains could be selectively created. However, there were further...

maximum nitrogen content of PVN is 15.73%. PVN is a polymer that has an atactic configuration, meaning the nitrate groups are randomly distributed along...

toxic heavy metals in the catalysts (e.g. tin, cobalt or chromium) and atactic polymer components (liquid and difficult to separate) with undesirable...

designed the sequence-rearrangement concept to transform dynamic racemic (atactic) into homochiral (isotactic) supramolecular polymers and demonstrated acceleration...

particularly with materials that show crazing preceding brittle fracture such as atactic polystyrene (APS). For example, by forming a 50/50 mixture of APS with...

also stereoregular and can be isotactic or syndiotactic instead of just atactic. This tacticity introduces crystallinity in otherwise amorphous polymers...

opening polymerization strategy. He also reported the first synthesis of atactic and isotactic linear poly(benzyl 1,2-glycerol carbonate)s via the ring-opening...

distribution negatively influence the polymer properties of (generally atactic) polymers produced by RP. Common RP also does not allow the formation of...

complex along with the chiral ligand polymerizes meso-lactide into virtually atactic polylactic acid. Mehrkhodavandi discusses the mechanisms of these reactions...