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isotactic
isotactic, a. Chem. (aɪsəʊˈtæktɪk) [f. iso- + Gr. τακτ-ός arranged, ordered + -ic, as ad. It. isotattico (G. Natta 1955, in Atti d. Accad. Naz. d. Lincei, Mem. (Classe d. Sci. fis.) 8th Ser. IV. ii. 69), f. Attic τάττ-ειν (= Gr. τάσσειν) to arrange.] Having or designating a polymeric structure in wh... Oxford English Dictionary
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Amorphous poly alpha olefin
History In the mid-to-late-1950s, atactic polypropylene (APP) was a by-product of the synthesis of isotactic polypropylene (iPP) using first and early With the development in the 1980s of more active and stereospecific supported Z-N catalysts, the proportion of atactic polymer to crystalline isotactic wikipedia.org
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atactic
atactic, a. (əˈtæktɪk) [f. Gr. ἄτακτος not arranged (f. ἀ priv. + τακτός, vbl. adj. f. τάσσ-ειν to arrange) + -ic.] 1. Of language: not syntactic.1842 Chamb. Jrnl. 30 July 218 In this manner syntactic and atactic forms have been respectively formed. 2. Path. Of or pertaining to or afflicted with ata... Oxford English Dictionary
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Polypropylene
Perfectly isotactic PP has a melting point of . Commercial polypropylene is usually isotactic. This article therefore always refers to isotactic polypropylene, unless stated otherwise. wikipedia.org
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syndiotactic
syndiotactic, a. Chem. (ˌsɪndaɪəʊˈtæktɪk) Also (more correctly) syndyo-. [f. Gr. σύνδυο two together + τακτ-ός arranged, ordered + -ic.] Having or designating a polymer structure in which the substituent groups alternate on either side of the backbone of the molecule.1956 Natta & Corradini in Jrnl. ... Oxford English Dictionary
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Thermoplastic olefin
Structure The geometry of the metallocene catalyst will determine the sequence of chirality in the chain, as in, atactic, syndiotactic, isotactic, as wikipedia.org
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Polypropylene glycol
The isotactic polymer can be produced from optically active propylene oxide, but at a high cost. A salen cobalt catalyst was reported in 2005 to provide isotactic polymerization of the prochiral propylene oxide Properties PPG has many properties wikipedia.org
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stereoregulate
stereoregulate, v. Chem. (stɛriːəʊ-, stɪəriːəʊˈrɛgjʊleɪt) [f. stereo- + regulate v.] trans. To cause (a polymerization or its product) to be stereoregular. So ˌstereoˈregulated ppl. a., -ˈregulating vbl. n. and ppl. a.; ˌstereoreguˈlation.1959 Gaylord & Mark Linear & Stereoregular Addition Polymers ... Oxford English Dictionary
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Ansa-metallocene
catalysts used in the synthesis of polypropylene in the presence of methylaluminoxane (MAO) can be used to direct whether the product is syndiotactic, isotactic wikipedia.org
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stereoblock
ˈstereoblock Chem. [ad. It. stereoblocchi (G. Natta et al. 1957, in Chim. e Industr. XXXIX. 276/2): see stereo- and block n.] A segment of a polymer chain possessing stereoregularity. Also attrib., as stereoblock polymer, a polymer the chains of which contain such segments.1957 Chem. Abstr. LI. 1253... Oxford English Dictionary
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DuPhos
In polymerization catalysis DuPhos ligands are used in metal catalyzed alpha-olefin/carbon monoxide copolymerization to form chiral isotactic polyketones wikipedia.org
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Ziegler
Ziegler Chem. (ˈziːglə(r)) The name of Karl Ziegler (1898–1973), German chemist, used attrib. to designate a trialkyl aluminium-titanium tetrachloride catalyst discovered by him for the synthesis of stereoregular isotactic polymers of high density and crystallinity from an ethylene or propylene mono... Oxford English Dictionary
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ترتيبية
بوليمرات متماثلة الترتيب البوليمرات متماثلة الترتيب (Isotactic Polymers) تتألف من جزيء ضخم متساوي الترتيب : أي ان جميع المتبادلات على الوحدات التكرارية wikipedia.org
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Prolene
Composed of an isotactic crystalline stereoisomer of polypropylene, Prolene sutures are intended to be durable and long lasting. wikipedia.org
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CN101029102A - 催化剂组合物、等规聚合物、生产线型等规聚合物的方法及所述聚合物的用途 - Google Patents
CN101029102A CNA200710087201XA CN200710087201A CN101029102A CN 101029102 A CN101029102 A CN 101029102A CN A200710087201X A CNA200710087201X A CN A200710087201XA CN 200710087201 A CN200710087201 A CN 200710087201A CN 101029102 A CN101029102 A CN 101029102A Authority CN China Prior art keywords isotactic polymer line style alkene isotactic polymers Prior art date 2003-01-28 ...
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