Detail of "84494-81-5"

Reference

Pattern-forming materials

Pattern-forming materials. (Japan Synthetic Rubber Co., Ltd., Japan). Jpn. 84494-81-5 are also occured in this study. Kokai Tokkyo Koho JP 60052845 A2 26 Mar 1985 Showa, 6 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: ICM: G03C001-71. ICS: G03F007-10. APPLICATION: JP 83-160259 2 Sep 1983. DOCUMENT TYPE: Patent CA Section: 74 (Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes) Pattern-forming materials which are sensitive toward light or ionizing radiation have, as the main constituents, a polymer contg. a silyl group or groups and a compd. which generates a cation or anion upon irradn. with light or ionizing radiation. The materials provide pos.- or neg.-working resists by selecting the developer soln. and exhibit good dry-etch resistance. Thus, p-vinylphenoxy-tert-butyldimethylsilane prepd. from 4-vinylphenol and tert-butyldimethylsilyl chloride was polymd. in the presence of BuLi to give a polymer. A resist contg. the polymer and Ph3S+AsF6- was coated on a Si wafer, patternwise irradiated with an ionizing radiation, and then developed with 2-PrOH to obtain pos. patterns showing high resoln. .

Metallocene-mediated synthesis of chain-end functionalized polypropylene and application in PP/clay nanocomposites

Metallocene-mediated synthesis of chain-end functionalized polypropylene and application in PP/clay nanocomposites. Chung, T. C. (Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA). Journal of Organometallic Chemistry, 690(26), 6292-6299 (English) 2005 Elsevier B.V. CODEN: JORCAI. ISSN: 0022-328X. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) Section cross-reference(s): 37 The prepn. of chain end functionalized isotactic polypropylene (PP) having a terminal functional group, such as Cl, OH, and NH2 is described. The metallocene-mediated propylene polymn. was carried out using rac-Me2Si[2-Me-4-Ph(Ind)]2ZrCl2/MAO complex as catalyst in the presence of styrene derivs. (St-f) and hydrogen, as chain transfer agents.There are some reagents like 84494-81-5 is used in this study.Except for chemicals metioned above, 84494-81-5 is also used. The mol. wt. of polypropylene (PP) with terminal Cl, OH, and NH2 group (i.e., PP-t-Cl, PP-t-OH and PP-t-NH2) is inversely proportional to the molar ratio of [St-f]/[propylene]. Despite the extremely low concn. of functional groups, the high mol. wt. chain end functionalized PP-t-OH and PP-t-NH+3 exhibit a distinctive advantage over other functional PP polymers contg. side chain functional groups or long functional blocks. The terminal hydrophilic OH and NH+3 cations, with good mobility and reactivity, effectively hydrogen bond and ion-exchange the cations (Li+, Na+, etc.) located between clay interlayers. Such interactions anchor the PP chain to the clay surfaces. The rest of the unperturbed end-tethered high mol. wt. PP tail exfoliates the clay layers. This exfoliated structure is maintained even after further mixing of PP-bearing platelets with pure neat PP polymers. ..