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Couphng agent

In the presence of ZnO, the dump temperature is a parameter of paramount importance in mixing of a silica compound containing a couphng agent with a polysulfidic moiety The sulfur eliminated from the coupling agent causes premature scorch in the presence of ZnO. This problem is partially solved when ZnO is added in the productive mixing step on the two-roU mill. [Pg.814]

Reversion characteristics of NR are of great concern. Lot of novel chemicals have been introduced to increase the reversion resistance of NR. Examples of these are zinc soap activator (Structol-A73), silane couphng agent (Si-69), anti-reversion agent (Perkalink 900), and post-vulcanization stabilizer (Durahnk HTS and Vulcuren KA 9188 Figure 32.7). These materials will enhance the life of the tire, enable the users for more retreading, and thereby reduce the material demand. " ... [Pg.925]

NADH can sometimes be used to follow enzyme reactions in which it is not directly involved by using it as a couphng agent in a secondary reaction with the product. For example, serum glutamic-oxaloacetic transaminase (GOT) catalyzes the reaction of a-ketoglutarate and asparate, and the product is reduced by NADH in the presence of another enzyme, malic acid dehydrogenase (MDH) ... [Pg.654]

Hi) A silane couphng agent to attach the filler to the matrix. [Pg.38]

PPy wires and sensor devices with feature sizes as small as 200 nm in width could be successfully fabricated through a hft-off process [385]. Surfactants and surface-coupHng agents were employed in order to improve the adhesion of PPy to the sihcon substrate. Upon cychc exposure to ammonia gas, the PPy wire sensor was at least six times more sensitive than the PPy bulk film sensor. [Pg.237]

In some cases, silicone is as effective when blended into an adhesive formulation as when it is applied separately as a primer. For silicone-couphng agents, moisture adsorbed on the substrate plays an important role in attaching the silicone molecule through hydrolysis. The opposite end of the molecule contains a chemical group such as a vinyl or amine, which is reactive with the epoxy, polyester, or other resin that is to be adhered to the... [Pg.119]

Marsden, J.G. and S. Sterman, Organofunctional silane couphng agents (Chapter 40). Handbook of Adhesives (1. Skeist, ed.), 3rd ed.. Van Nostrand Reinhold, New York, 1990. [Pg.135]

Strength. The strength of filled and reinforced plastics, resistance to thermal cycling, and efficiency of flame retardants may be improved by couphng agents, bnt commercial secrecy and salesmanship have obscured any objective benefits. [Pg.345]

H.A. Youssef, M.R. Ismail, M.A.M. Ali and A.H. Zahran, Effect of the various couphng agents on the mechanical and physical properties of thermoplastic-bagasse fiber composites. Polym. Compos. 29,1057-1065, (2008). [Pg.269]

Harper, D. Wolcott, M. Interaction between couphng agent and lubricants in wood-polypropylene composites. Compos. Part A, 2004, 35, 385-394. [Pg.1866]

HF Wu, DW Dwight, NT Huff. Effects of silane couphng agents on the interphase and performance of glass-fiber-reinforced polymer composites. Compos Sci Technol 57 975-983, 1997. [Pg.471]

Legrand, F. Composition containing a polycarboxylic compound and a couphng agent for the treatment of hair. Fr. Demande FR 2870725, 2005 Chem. Abstr. 2005,144, 27129. [Pg.315]

The leading snppliers of silane couphng agents in North America are Witco and Dow Coming. Other major suppliers include Degussa, Nippon Unicar, PCR, Rhodia, Shin-Etsn Chemical, and Sivento for silanes and Kenrich Petrochemicals and Rhodia for titanates. [Pg.118]

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