handbook of polymer synthesis second edition episode 15 pdf
Handbook of Polymer Synthesis Second Edition Episode 15 pdf
... extent of reaction and degree of polymerization to the average functionality favg of the system At the gel point the number average degree of polymerization Xn becomes infinite and therefore the second ... importance of this first example of a solid phase synthesis on polymer support which was followed by the development of numerous polymeric reagents [148] Presently, the fast expanding technique of combinatorial ... crosslinked polymer structure Branches from one polymer molecule will be capable of reacting with those of another polymer molecule because of the presence of the B–B reactant Crosslinking can be pictured...
Ngày tải lên: 13/08/2014, 16:21
Handbook of Polymer Synthesis Second Edition Episode 4 pdf
... diffusivity of monomer dissolved in the supercritical CO2 and the plasticization of the polymer, the rate of polymerization of the second block can be increased, and thereby, a one pot synthesis of block ... 10À4 Mn PDI Comonomer Time/h 10À4 Mn PDI Ref 5.34 0 .15 0.31 0.31 0.31 0.31 0.31 0.31 0.31 0.31 1.13 1.14 1 .15 1 .15 1 .15 1 .15 1 .15 1 .15 1 .15 1 .15 DAMAa n-Butyl methacrylate n-Butyl methacrylate ... End-functional polymers and copolymers One advantage of living anionic polymerization is the availabilty of telechelic polymers [207] and macromonomers, which are of specific interest for the preparation of...
Ngày tải lên: 13/08/2014, 16:21
Handbook of Polymer Synthesis Second Edition Episode 13 pdf
... of EPK polymerization oligomers (10b) of higher molecular weight can be prepared using both cationic and anionic initiators Polymerization with potassium hydride yields polymers of a degree of ... and Bradley ¨ [140] One of the major improvements was the use of tetrahydrothiophene instead of dimethyl sulphide in the synthesis of the precursor polymer [141] The use of the cyclic leaving group ... variety of polymers with carbazole groups have been synthesized and their photophysical properties have been investigated The main topic of this article is the synthesis of photoconductive polymers,...
Ngày tải lên: 13/08/2014, 16:21
Handbook of Polymer Synthesis Second Edition Episode 1 ppt
... the polymerization of up to 100 tons of ethene per g of zirconium [151 153 ] At such high activities the catalyst can remain in the product The insertion time (for the insertion of one molecule of ... CatÀM1 polymer þ M1 À CatÀM1 ÀM1 polymer ! k12 CatÀM1 polymer þ M2 À CatÀM2 ÀM1 polymer ! k21 CatÀM2 polymer þ M1 À CatÀM1 ÀM2 polymer ! k22 CatÀM2 polymer þ M2 À CatÀM2 ÀM2 polymer ! ... distribution The copolymerization of ethene and norbornene is possible ð31Þ C Copolymers of Ethene The properties of polyethene could be varied in a wide range by copolymerization of ethene with...
Ngày tải lên: 13/08/2014, 16:21
Handbook of Polymer Synthesis Second Edition Episode 2 docx
... cationic polymerization A list of studies of the cationic polymerization of styrene is given in Ref [86] One of the most interesting developments in this field is the polymerization of styrene ... pure PS Copolymerization with Divinylbenzene Copolymerization of styrene with small amounts of bifunctional monomers such as divinylbenzene is used for the synthesis of networks The polymerization ... copolymers under participation of CT-complex b-MeSt is also a good transfer agent of propene polymerization but becomes partially incorporated into the polymer [234] Anionic polymerization of...
Ngày tải lên: 13/08/2014, 16:21
Handbook of Polymer Synthesis Second Edition Episode 3 pot
... course of the polymerization [247–249] Particularly attractive aspects of this technique of radiation polymerization are the excellent efficiency of polymerization together with the high rates of polymerization ... nature of RAFT polymerization allows the synthesis of block copolymers, star polymers and gradient copolymers [266] Copyright 2005 by Marcel Dekker All Rights Reserved The homopolymerization of ... theory, the degree of polymerization should be a function of the number of polymer lattices and initiator concentration However, for the polymerization of VC in emulsion, the degree of polymerization...
Ngày tải lên: 13/08/2014, 16:21
Handbook of Polymer Synthesis Second Edition Episode 5 potx
... situ by hydrolysis of chlorodiethylaluminum or ethylaluminum sesquichloride Only 0.005 to 0.02 mmol of cobalt salt is needed for the polymerization of mol of 1,3-butadiene [157 159 ] At C the molecular ... rings: ð64Þ At a polymerization temperature of 22 C, approximately 80% of the cyclopentane rings in the polymer are trans Table 23 shows some other examples of the polymerization of nonconjugated ... distribution) The average degree of polymerization is equal to the ratio of converted moles of monomer (starting concentration [M ]0) over the number of moles of initiator [I ] reacted: Pn ¼ ½M...
Ngày tải lên: 13/08/2014, 16:21
Handbook of Polymer Synthesis Second Edition Episode 6 pot
... enabled also the preparation of block copolmers by sequential addition of different monomers [114–116] and synthesis of highly conjugated polymers and block copolymers of 3,4-diisopropylidenecyclobutene ... active aryloxy-alkyloxy tungsten initiator (15) [156 ] and performed ROM polymerizations [156 ,157 ] and RCM reactions [158 ] with it Oxoalkylidene complexes of the type (W¼CH-CH¼CPh2)(O)[OCMe(CF3)2]2*L ... for ROMP of norbornene [159 ] His synthetic strategy employed 3,3-diphenylcyclopropene for the synthesis of the alkylidene moiety [159 ,160] This method was later adapted for the synthesis of the...
Ngày tải lên: 13/08/2014, 16:21
Handbook of Polymer Synthesis Second Edition Episode 7 pptx
... early exploration of these methods has been reviewed in the 1st edition of this handbook (Chapter 9) ð54Þ In a publication of 1988 [79] (not reviewed before) polycondensations of phenoxybenzoyl ... to the homopolymers a series of copolymers with systematic variation of the hydroquinone/resorcinol ratio was studied Another publication [113] reported on an analogous series of copolymers prepared ... polycondensations of the monomers (95c,d) [154 ] ð93Þ ð94Þ ð95Þ Liquid-crystalline PEKs? One research group reported in three papers [155 157 ] on synthesis and characterization of seemingly liquid-crystalline...
Ngày tải lên: 13/08/2014, 16:21
Handbook of Polymer Synthesis Second Edition Episode 8 ppt
... is the number of ml of HCl used for titration of the blank, S is the number of ml of HCl used for titration of the sample, N is the molarity of HCl solution, and W is the weight of the sample ... of moles of the polyol, npol, to be 1, r becomes the number of moles of the chain extender Number of moles of the diisocyanate, nISO, at the stoichiometric ratio of NCO/OH groups is the sum of ... of the solid or liquid particle, in case of heterogeneous nucleation The beginning of foam formation is characterized by formation of large number of nuclei Their creation causes refraction of...
Ngày tải lên: 13/08/2014, 16:21
Handbook of Polymer Synthesis Second Edition Episode 9 ppsx
... influence of the electronic parameters of the diamines in the determination of reactivity The reaction of the first amino group, that is converted to amide, causes a decrease of the reactivity of the second ... used in the synthesis of many poly(ester imide)s of varied chemical structure [154 158 ], including a great deal of novel aliphatic–aromatic and aromatic thermotropic poly(ester imide)s [159 ] Poly(ester ... synthesized and studied with the objective of improving the properties of classical addition polymers [234–237] The synthesis of these polymers fits the general rules to polymerize unsaturated monomers via...
Ngày tải lên: 13/08/2014, 16:21
Handbook of Polymer Synthesis Second Edition Episode 10 pps
... addition of hydroquinone, the yield of copolymer can be increased in the presence of traces of benzoyl peroxide [309] The copolymerization behavior of MVK can be changed by complexation of the ... toluene and amorphous polymers during homogeneous polymerization in tetrahydrofuran The softening points of the crystalline polymers were about 240 C [342] Atactic polymer of t-butyl vinyl ketone ... rate of polymerization of crotonaldehyde increases with the dielectric constant of the solvent is evidence for an ionic mechanism of the polymerization An increase in dielectric constant of the...
Ngày tải lên: 13/08/2014, 16:21
Handbook of Polymer Synthesis Second Edition Episode 11 pptx
... Nþ/ CoPc(SOÀ)4 of : [146 ,151 ,152 ] The tendency of aggregation of phthalocyanines in water strongly depends on the hydrophilic character of the kind of latexes based on copolymers of styrene, quarternized ... number of macrocycles n (degree of polymerization) with the number of bridged monomers b and the number of end monomers e n ¼ b=2 þ e=4 ð9Þ Evaluation of some data (determination of number of nitrile ... The influence of ring size on the mechanism of the binding of metal ions by polymers can be illustrated in relation to the formation of complexes between TiCl4 and the copolymers of styrene and...
Ngày tải lên: 13/08/2014, 16:21
Handbook of Polymer Synthesis Second Edition Episode 12 pptx
... Electrochemical Synthesis of Conducting Polymers in Handbook of Conducting Polymers, Vol (Skotheim, T A., ed.), Marcel Dekker, New York, p 82; Street, G B (1986) From Powder to Plastics in Handbook of Conducting ... fulvene are just a few of the large number of electrically conducting polymers with specific properties and interest [20] XIV SUBSTITUTED POLY(ACETYLENE)S [20,45] The synthesis of polymers from substituted ... atmospheric pressure, the kinetic of polymerization was found to be of second order The same reaction in NMP was revised by Russian authors [99] The polymerization of diphenyldisulfide produced PPS...
Ngày tải lên: 13/08/2014, 16:21
Handbook of Polymer Synthesis Second Edition Episode 14 pptx
... efficiency of 22 lm/W [3] Polyfluorene Copolymers The described synthesis of polyfluoren homopolymers allows also the design of alternating copolymers Instead of the 2,7-dibromofluorene a variety of dibromoarenes ... ratio of about 0.4 and an average degree of polymerization of about 30 [43] ð12Þ Phenylic substituents at the vinylene positions — increasing both solubility of the polymer and stability of the ... the notion of isolated chromophores in 1992 by selectively eliminating one of two leaving groups of the precursor polymer to give a conjugated–non-conjugated polymer The design of such polymers...
Ngày tải lên: 13/08/2014, 16:21
Handbook of Polymer Synthesis Second Edition Episode 16 pps
... USDA Copolymers of glycolic acid and lactic acid by direct thermal polymerizations have Tms 135 C, which is lower than that of copolymers with similar compositions obtained by ring opening polymerization ... homopolymers than those of the copolymers Crosslinking with peroxides increases the impact and tensile strength of PCL and PLA copolymers [31–33] Micromonomers were prepared from ring opening polymerization ... polymerization of cyclic ester with functionalized initiator (3) Synthesis of polycaprolactone micromonomer ð3Þ Table Copolyesters of L-lactic acid (LLA) and e-hydroxycaproic acid (HCA) Method of polymerization...
Ngày tải lên: 13/08/2014, 16:21
Handbook of Polymer Synthesis Second Edition Episode 17 pot
... (2000) Synthesis of block copolymer by combination of living cationic and iniferter polymerization systems Polymer, 41(18): 6709–6713 288 Liu, Y., Ying, S., and Wan, X (1999) Synthesis of block copolymers ... for synthesis of ABA triblock copolymers with macro-iniferter technique Polymer, 42(7): 3033–3042 194 Greiner, A., et al (2000) Method for synthesis of block polymers by controlled radical polymerization ... copolymers Gaofenzi Xuebao, (3): 357–360 282 Yildirim, T G., et al (1999) Synthesis of block copolymers by transformation of photosensitized cationic polymerization to stable free radical polymerization...
Ngày tải lên: 13/08/2014, 16:21
handbook of industrial crystallization, second edition
... Handbook of IndustriaI CrystalIization Second Edition This Page Intentionally Left Blank Handbook of Industrial Crystallization Second Edition Edited by Allan S Myerson Professor of Chemical ... Scale-Up 8.6 Modeling 8.6.1 Experimental Modeling 8.6.2 Computational Modeling 154 154 156 157 158 158 158 159 159 161 161 162 162 163 163 163 164 166 166 167 167 167 167 167 167 171 173 174 ... the heat of solution Heats of solution are often given in terms of the dissolution of mol of solute in moles of solvent at a particular temperature This is known as an integral heat of solution...
Ngày tải lên: 01/04/2014, 11:19
Handbook of Microbiological Media, Fourth Edition part 15 docx
... to bar pressure Autoclave for 15 at 15 psi pressure–121°C Prior to inoculation of cultures, add 0.25mL of sterile Na2S·9H2O solution to each tube containing 9.75mL of sterile basal medium Use: ... to bar pressure Autoclave for 15 at 15 psi pressure–121°C Prior to inoculation of cultures, add 0.25mL of sterile Na2S·9H2O solution to each tube containing 9.75mL of sterile basal medium Use: ... cultivation of lactic acid bacteria For the cultivation of heterofermentative lactobacilli from meat and other foods The American Public Health Association recommends adding 100.0μg/L of thiamine...
Ngày tải lên: 03/07/2014, 18:20
Handbook of Psychotherapy Integration, Second Edition Part 1 doc
... Holmes, and C Eugene Walker Handbook of Psychotherapy Integration, Second Edition edited by John C Norcross and Marvin R Goldfried Handbook of Psychotherapy Integration Second Edition Edited by John ... of behavior change Improving the efficacy, efficiency, and applicaˆ bility of psychotherapy is the raison d’etre of integration The 13 years between publication of the original edition of the Handbook ... a new edition OUR AIM What has not materially changed is the purpose of our book The aim of this second edition vi Preface continues to be a state -of- the-art, comprehensive description of psychotherapy...
Ngày tải lên: 08/08/2014, 13:20