Branched Polymers I Episode 4 potx
Branched Polymers I Episode 4 potx
... 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 med...
Ngày tải lên: 13/08/2014, 08:21
Branched Polymers I Episode 1 potx
... kinematic viscosity. Functional star -branched PIBs were prepared in high yield by Wang et al. [12], based on living cationic polymerization via haloboration initiation. First, living PIBs carrying X 2 B- ... formation of resonance stabilized carbo- cation upon ionization of the initiator. This is questionable, however, in view of Synthesis of Branched Polymers by Cationic Polymerization...
Ngày tải lên: 13/08/2014, 08:21
Branched Polymers I Episode 2 pps
... butadiene c gel gelation concentration d critical dimensionality D diffusion coefficient D inter interchain distance DMAPLi 3-dimethylaminopropyllithium DOP diisooctylphthalate DSC differential scanning calorimetry DVB ... structure. Asymmetric Star Polymers: Synthesis and Properties Nikos Hadjichristidis, Stergios Pispas, Marinos Pitsikalis, Hermis Iatrou and Costas Vlahos Department of Chem...
Ngày tải lên: 13/08/2014, 08:21
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
Branched Polymers II Episode 4 ppt
... p will satisfy a linear one-dimensional diffusion equation – the physics is identical to that of diffusion in one dimension if we map the population of original tube seg- ments onto diffusing ... t (x) in this long-time regime needs to honour the delayed time at which dynamic dilution is regained, and so picks up an effective extra friction in this slowest regime. This extra friction just .....
Ngày tải lên: 13/08/2014, 08:21
Tiếng Việt lớp 4 - ÔN TẬP GIỮA HỌC KÌ I TIẾT 4 potx
... thường g i em là “cún con” 3 Cô giáo em thường n i: “Các em hãy cố gắng học thật gi i để làm vui lòng ông bà cha mẹ”. 1. Gi i thiệu b i: -H i từ tuần 1 đến tuần 9 các em đã học những chủ i m ... dùng v i nghĩa đặc biệt. -G i HS lên bảng viết ví dụ: 1 Cô giáo h i: “Sao trò không chịu làm b i? ” 2 Mẹ em h i: -Con đã học xong b i chưa? 1 Mẹ em i chợ mua rất nhiều thứ: gạo, thị...
Ngày tải lên: 06/07/2014, 16:20
FAG Bearings I Part 4 potx
... the operating conditions. Lubrication Oil sump lubrication provides the transmission bear- ings with lubricant. The flinger oil is conveyed via the ring gear from the oil sump and fed directly ... invari- ably use only labyrinth seals. Dimensioning, bearing selection Operating data 43 : UIC axle boxes with 44 : UIC axle boxes with cylindrical roller bearings spherical roller bearings Deadwe...
Ngày tải lên: 10/08/2014, 19:20
SIMULATION AND THE MONTE CARLO METHOD Episode 4 potx
... example of a precedence list of activities is given in Table 4. 2; its PERT graph is given in Figure 4. 2. Table 4. 1 Precedence ordering of activities. Activity 1 2 3 4 5 6 7 8 9 10 ... an important tool in a wide variety of disciplines: engineering, operations research and management science, statistics, mathematics, physics, economics, biology, medicine, engineering,...
Ngày tải lên: 12/08/2014, 07:22
Standard Handbook of Engineering Calculations Episode 4 potx
... driving member if desired. Use the same relations as given MECHANICAL ENGINEERING 3.39 FIGURE 4 Epicyclic gear trains. Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright ... parts Simplicity Crossed Light power drives No critical positioning required in a helical right-angle drive Face gear Small power drives Simple and easy to position...
Ngày tải lên: 12/08/2014, 07:22
Wankat & Oreovicz - Teaching Engineering Episode 4 potx
... discussion is the cooperative group learning method which is included in both this section and in Section 7.2. Discussions and questions (see Section 6 .4) aim to involve students in the material ... student gains in problem solving and critical thinking are highest in well-functioning student-centered discussions (McKeachie, 1986). In addition, student changes in attitude are highest in stud...
Ngày tải lên: 12/08/2014, 08:22