block copolymers and polymer assemblies

... Stabilizers and Amphiphilic Block Copolymers Liudvikas Segewicz and Marijus Petrowsky (Editors) 2010 ISBN: 978-1-60692-928-5 POLYMER SCIENCE AND TECHNOLOGY SERIES POLYMER AGING, STABILIZERS AND AMPHIPHILIC ... formation, and noncovalent bond cross-linking The block copolymers are molecularly converted in situ from the nonamphiphilic copolymers completely dissolved in a solvent to amphiphilic copolymers ... [13-18], and noncovalent bond cross-linking [1921] The block copolymers are molecularly converted in situ from the nonamphiphilic copolymers completely dissolved in a solvent to amphiphilic copolymers...

Ngày tải lên: 12/02/2014, 16:20

... presence of homopolymers (PEO and PAA), and two gel phases behavior of F127+L64 mixture are observed, and a greater understanding of the interactions between amphiphilic copolymers and polymeric additives ... Overview of Pluronic triblock copolymers Poly (ethylene oxide) – poly (propylene oxide) – poly (ethylene oxide) (PEO-PPO-PEO) triblock copolymers are a subset of amphiphilic block copolymers also commercially ... the self-assembly in amphiphilic block copolymers A B Figure 1.1 Schematic representation of AB diblock copolymer forming micelle in a selective solvent Block copolymers are composed of chemically...

Ngày tải lên: 09/09/2015, 11:25

... SWITCHGEAR AND CONTROLGEAR ASSEMBLIES Part 1: Type-tested and partially type-tested assemblies General 1.1 Scope and object This International Standard applies to low-voltage switchgear and controlgear ... SWITCHGEAR AND CONTROLGEAR ASSEMBLIES Part 1: Type-tested and partially type-tested assemblies FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization ... 71 Short-circuit protection and short-circuit withstand strength 87 Switching devices and components installed in ASSEMBLIES 95 Internal separation of ASSEMBLIES by barriers or partitions...

Ngày tải lên: 25/12/2013, 11:00

... International Standards transparently to the maximum extent possible in their national and regional standards Any divergence between the IEC Standard and the corresponding national or regional standard ... Low-voltage switchgear and controlgear assemblies, of IEC technical committee 17: Switchgear and controlgear This third edition cancels and replaces the second edition published in 1987 and its amendment ... (busways) General 1.1 Scope and object Add the following paragraphs: This International Standard applies to busbar trunking systems (BTS) and their accessories for feeding and distributing electrical...

Ngày tải lên: 25/12/2013, 11:05

... International Standards transparently to the maximum extent possible in their national and regional standards Any divergence between the IEC Standard and the corresponding national or regional standard ... amendments and Distribution boards shall comply with all requirements of IEC 60439-1 (1999): Low-voltage switchgear and controlgear assemblies, Part I : Type-tested and partially type-tested assemblies, ... 1211 GENEVA 20 Switzerland i(I COPYRIGHT International Electrotechnical Commission I Licensed by Information Handling Services Q1 Please report on ONE STANDARD and ONE STANDARD ONLY Enter the...

Ngày tải lên: 25/12/2013, 11:06

... International Standards transparently to the maximum extent possible in their national and regional standards Any divergence between the I EC Standard and the corresponding national or regional standard ... amendments and Assemblies for construction sites (ACS) shall comply with all requirements of IEC 60439-1 (1985): Low-voltage switchgear and controlgear assemblies, Part 1: Requirements for typetested and ... and regulating equipment complete with all their internal electrical and mechanical connections and structural parts (see 2.4), designed and built for use on all construction sites, indoors and...

Ngày tải lên: 25/12/2013, 11:07

... International Standards transparently to the maximum extent possible in their national and regional standards Any divergence between the I EC Standard and the corresponding national or regional standard ... Operating and maintenance gangways within ASSEMBLIES (see 2.7.1 and 2.7.2) Not applicable 7.6 Switching devices and components installed in ASSEMBLIES Selection of switching devices and components ... 60439-1 (1992): Low-voltage switchgear and controlgear assemblies, Part 7: Type-tested and partially type tested assemblies, if not otherwise indicated hereinafter and shall also comply with the particular...

Ngày tải lên: 25/12/2013, 11:08

... polyethylene and ethylene copolymers and derivatives; (B) polypropylene and propylene copolymers and derivatives; and (C) polymers and copolymers based on other 1-olefins Many of these polymers, ... resulting polymer structure may be blocky: I.T alternating: I.U or random: I.V or a second chain can be grafted onto the first: I.W Blocky and random copolymers are the most common In block copolymers, ... II.B.3— Polymers and Copolymers of Other 1-Olefins There are also commercially available homopolymers and copolymers made from higher 1-alkenes, such as 1butene, 3-methyl-1-propene (isobutylene), and...

Ngày tải lên: 01/06/2014, 10:11

... EO106 blocks is also dependent on temperature and Scheme PO70 block stacking due to hydrogen bonding 123 106 Fig Effect of temperature and concentration on 1H NMR spectra of EO106 and PO70 blocks ... both temperature and copolymer concentration is clearly shown by the changes in line shape and chemical shift of the PO70 block b, c resonances Under aqueous conditions, the PO70 block is expected ... both PO70 and EO106 blocks appear to be temperature-dependent There is a fine structure (bCH2 or cCH) at 20 °C, and partial overlap with b‘CH2 units of EO106 block The spectra at 40 and 60 °C...

Ngày tải lên: 22/06/2014, 22:20

Ngày tải lên: 28/09/2014, 23:27

... switchgear and controlgear for voltages up to and including 000 V a.c and 200 V d.c BS 5486, Low-voltage switchgear and controlgear assemblies BS 5486-1, Specification for type-tested and partially ... 16 mm2 Neutral busbars of SP and N fuseboards (see 7.1.4.1) and 20 A and 32 A TP and N fuseboards shall have one outgoing terminal for each fuse For all other TP and N fuseboards the neutral ... provided as follows: a) SP and N (all ratings of fuseway), one terminal for each fuseway; b) TP and N (20 A and 32 A fuseways), one terminal for each fuseway; c) TP and N (63 A and 100 A fuseways),...

Ngày tải lên: 28/09/2014, 23:27

... fluids and try to understand the flow field generated by micro swimmers The second part of the thesis deals with polymer statistics Polymers are chains made up with repeating units For example, polymers ... hydrodynamic forces and try to understand the fluid particle interactions Chapter then studies a single polymer statistics We will review some famous existing polymer models and then focus on the ... obviously linear and we can see that ψ1 and ψ2 can be solved separately, with the right hand side of (2.2.64) being − sin φ sin θMΩ and cos φ sin θMΩ respectively With the right hand side fixed,...

Ngày tải lên: 09/09/2015, 08:17

... Murugan, Dr Venugopal and Dr Molamma for teaching me new scientific concepts and polymer chemistry The knowledge that I imparted from them helped me to formulate new ideas and assisted me to advance ... excellent guidance and valuable advice in scientific discussions and furthermore, spending his time in showing and explaining the entire process involved in the fabrication and installations of ... beloved parents and my lovely brother Without my parents’ blessings and moral support, I don’t think I could have completed my PhD Studies Thank you mom and dad!!! I love you and am forever indebted...

Ngày tải lên: 09/09/2015, 11:14

... SILICA -POLYMER CORE-SHELL HYBRIDS AND POLYMER HOLLOW STRUCTURES: SYNTHESIS, CHRACTERIZATION AND APPLICATIONS LI GUOLIANG M Sci., Polymer Chemistry and Physics Nankai University 2007 B Eng., Polymer ... synthesize hollow polymer micro- and nanospheres with novel morphology and functions via a combination of inorganic and polymer synthesis and optimize the applications of these hollow polymer structures ... amphiphilic block copolymer chains, the long hydrophobic segments and short hydrophilic segments of the copolymers form the core and the corona, respectively Changing the relative length of blocks...

Ngày tải lên: 10/09/2015, 08:40

... used bridging ligands.43 The pincer [NCN] Pt(II) complexes bridged by dppm (1.20a and 1.21a), deprotonated pyrazole (1.20b and 1.21b) and deprotonated imidazole ligands (1.20c and 1.21c) were ... namely the homo- and heterometallic complexes bridged by the phosphido ligands The chemical properties of a phosphido ligand and its complexes are different from the ligands and their corresponding ... supported by these ligands 1.3 Homo- and Heterometallic Complexes Bridged by the Phosphido Ligands Phosphido ligand [(PR2) -] is an important supporting ligand in homo-52 and heterometallic53...

Ngày tải lên: 11/09/2015, 09:01

... [2.129(4) Å] and [Pd(OH2)(PCP-tBu2)][BPh4] [2.056(6) Å], reflecting the intermediate trans influence of chloro-ligand compared to the methyl and aqua ligands 37 Chapter Two: Synthesis and Ligand Displacement ... 2.17a (-76.0 ppm and -76.1 ppm) and 2.18 on the other hand showed two peaks (-77.3 ppm and -77.4 ppm), which can be explained by the 10 B/11B 68 Chapter Two: Synthesis and Ligand Displacement ... of triflato-, nitrato- and aqua ligands in complexes 2.16a, 2.16b and 2.17a that lie between that of the chloro ligand in complex 2.1 70 Chapter Two: Synthesis and Ligand Displacement Reactions...

Ngày tải lên: 11/09/2015, 09:01

... metalloligand [Pd(4Spy)(PCP)] 3.4 was prepared by a standard ligand replacement reaction135 of complex 2.1 with 4-pyridinethiolate ligand The thiolato ligand was generated insitu from 4-pyridinethiol and ... of the bridging dppf ligand and a long Pd-C bond) The steric crowding between the dppf ligand and the pincer moiety are indicated by the upfield shift of the Cp protons and the highly distorted ... complexes in both solution and solid states will be discussed 3.2 Results and Discussion 3.2.1 Synthesis and Characterisation of the Ligand-bridged Complexes of Dppf and 4,4’-Bipyridine The triflato...

Ngày tải lên: 11/09/2015, 09:01

... donor ligand is different from other neutral ligands such as the bipyridine, bisphosphine and the metalloligands as described in Chapter Two and Chapter Three The background of the homoand heterometallic ... involving the Ag and Mn atoms.145d X-ray structural analyses of clusters 4.4a and 4.4b revealed a metal triangle with the phosphido ligand bridging the Mn-Mn bond and a phosphine ligand bridging ... gave a mixture of 4.3a and 4.3b at 1st major yellow band (0.0784g) Clusters 4.4a and 4.4b were obtained at the 2nd minor band (0.0080g) 31 P {1H} NMR spectrum of 1st band (in CDCl3) suggest 4.3b...

Ngày tải lên: 11/09/2015, 09:01

... Three and Chapter Four, the oxalato ligand can link two or more metal centres while acting as a bridging tetradentate ligand [Figure 1-9, (d) and (f)] The complexes obtained from this ligand often ... oxalato ligands On the other hand, the polymeric {[LiCr(C2O4)3]2-}n could be viewed as [Cr(C2O4)3]3metalloligands coordinating to Li(I) in a chelate mode.161a The C-O bond lengths [1.241(3) Å and 1.263(3) ... network structure supported by the oxalato and aqua ligands.162 Part of the polymeric network 5.2 is shown in Figure 5-2 One of the major differences between 5.1 and 5.2 is that in the former, both...

Ngày tải lên: 11/09/2015, 09:01

... by the phosphido and bisphosphine ligands The oxalato complexes reported in Chapter Five are polymeric networks containing the paramagnetic metal centres [Mn(II) and Cr(III)] and the main group ... and phosphido ligands as well as the heterometallic oxalato-bridged complexes The objective of this work was to develop convenient synthetic methodologies, understand the formation pathways and ... obtained via ligand displacement reactions The Ag/Mn heterometallic clusters 4.3a and 4.3b were obtained from condensation reactions between 4.1144 and the Ag(I) diphosphine complexes 4.2a and 4.2b.147,...

Ngày tải lên: 11/09/2015, 09:01