Branched Polymers I Episode 3 pptx

... disproportionation or for the chain transfer to small mol- ecules. In this respect, any living polymerization with rapid initiation will afford polymers with a narrow DP distribution of the Poisson ... end-capping of a living polymer (termination method), (b) initiation of living polymeriza- tion (initiation method), (c) transformation of any functional end-group, and (d) polyaddition. Meth...

Ngày tải lên: 13/08/2014, 08:21

... on-line combination with light scattering and viscosity detectors. The technique and possibilities are discussed in detail. The discussion of the semi-dilute properties remains confined mainly ... This is outlined in the following sections. 3. 2 Special Relationships 3. 2.1 Static Light Scattering A relationship for evaluation of static light scattering (LS) data from dilute solu- tions is ....

Ngày tải lên: 13/08/2014, 08:21

... initiator. However, to our knowledge, although there is no specific limitation, cationic polymerization involving a microgel multifunction- al initiator has not been reported. Functionalization ... am- phiphilic graft copolymers with hydrophilic poly(vinyl alcohol) branches. In the (30 ) X=1 (31 ) X=Cl Synthesis of Branched Polymers by Cationic Polymerization 33 corresponding to the li...

Ngày tải lên: 13/08/2014, 08:21

... abbreviations A adsorbed amount AIBN N,N'-azobisisobutyronitrile Bd butadiene c gel gelation concentration d critical dimensionality D diffusion coefficient D inter interchain distance DMAPLi 3- dimethylaminopropyllithium DOP ... sh [] =+ [] ++ [] AB ABG A AB A BAG B AB B xx xx 33 3 3 3 23 53 23 23 53 23 23 1 2 7 12 / / / // / / ( )() ( )() F F F F 118 N. Hadjichristidis, S....

Ngày tải lên: 13/08/2014, 08:21

... expansion in a good solvent is limited. In this re- gard it is important to note that the q condition must be carefully specified. It is known that branched polymers have different q conditions ... hydrody- namic radius in neutral or basic than in acidic solution. Dendrimers terminated with CH 2 NH 2 groups have values of R h 35 % larger in neutral or acidic conditions than in a basic m...

Ngày tải lên: 13/08/2014, 08:21

... theorem the infinite volume limit as Λ → R D exists for each term in the sum over N. (ii) By translation invariance the limit is independent of x 1 which is set equal to zero. (iii) Division by |Λ| ... associated vector field and let i V be the associated interior product which is an antiderivation on forms. By definition i V dz i = −2πiz and i V d¯z i =2 i z. Let L V be the associated...

Ngày tải lên: 05/03/2014, 23:20

... dư i, miếng shim m i có bề dày 2,50mm tương ứng v i shim có mã số 13. Số shim Bề dày (mm) Số shim Bề dày (mm) 01 2,20 27 2,85 03 2,25 29 2,90 05 2 ,30 31 2,95 07 2 ,35 33 3, 00 09 2,40 35 ... 33 3, 00 09 2,40 35 3, 00 11 2,45 37 3, 10 13 2,50 39 3, 15 15 2,55 41 3, 20 17 2,60 43 3,25 19 2,65 45 3, 30 21 2,70 47 3, 35 23 2,75 49 3, 40 25 2,80 6. Q...

Ngày tải lên: 22/07/2014, 09:20

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Ngày tải lên: 08/08/2014, 11:22

... locus, 3  i= 1 z i (K i − 1) = 3  i= 1 z i K i − 3  i= 1 z i = 3  i= 1 z i K i −1=0. (3. 5 .3) Because the K i are constants, Eq. 3. 5 .3 is the equation of a straight line. (It is a bit easier to see that it is ... of mixture that is phase 1. Elimination of x i1 from Eq. 3. 4 .3 gives x i2 = z i 1+L 1 (K i − 1) ,i= 1,n c . (3. 4.4) Similar elimin...

Ngày tải lên: 12/08/2014, 16:21

... 65000 3) The message signal can be written as m(t) = sin(2π10 3 t) + 5 cos(2π2 × 10 3 t) = −10 sin(2π10 3 t) + sin(2π10 3 t)+5 As it is seen the minimum value of m(t)is−6 and is achieved for sin(2π10 3 t)=−1ort ... = 20000 Hz. 3) If conventional AM is employed with modulation index α =0.6, the transmitted signal is u(t)=A[1 + αm(t)] cos(2πf 0 t) 57 Chapter 3 Problem 3. 1 The mo...

Ngày tải lên: 12/08/2014, 16:21