m**e
发帖数: 9 | 1 RCM, 用Schrock MAP catalyst (Schrock III generation),可以得到〉95% cis 的关
环(参考Hoveyda 的天然产物合成的那几片文章）。 如果是olefin metathesis
homocoupling 和cross metathesis，有些可以得到〉99% cis.
顺反：耦合常数+NOE 差不多就能搞定了。 |
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m**e
发帖数: 9 | 2 Schrock 和 Hoveyda 近5年投入了大量的人力物力来做 cis selective olefin
metathesis，在天然产物和药物的合成方面还蛮有成效的。
cis |
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y***o
发帖数: 416 | 3 Chem. Rev., 2005, 105 (11), pp 4073–4147
DOI: 10.1021/cr040670d
“Bound but Not Gagged”Immobilizing Single-Site α-Olefin Polymerization
Catalysts
Thank you very much! |
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y***o
发帖数: 416 | 5 Al-, Nb-, and Ta-Based Perfluoroaryloxide Anions as Cocatalysts for
Metallocene-Mediated Ziegler−Natta Olefin Polymerization
Yimin Sun , Matthew V. Metz , Charlotte L. Stern , and Tobin J. Marks
Organometallics, 2000, 19 (9), pp 1625–1627
DOI: 10.1021/om990946l
http://pubs.acs.org/doi/pdf/10.1021/om990946l
多谢了！ |
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y***o
发帖数: 416 | 6 1. Thermorheological Behavior of Various Long-Chain Branched Polyethylenes
Macromolecules, 2008, 41 (4), pp 1328–1333
DOI: 10.1021/ma702367a
http://pubs.acs.org/doi/abs/10.1021/ma702367a
2.Influence of Type and Content of Various Comonomers on Long-Chain
Branching of Ethene/α-Olefin Copolymers
Macromolecules, 2006, 39 (4), pp 1474–1482
DOI: 10.1021/ma0514018
http://pubs.acs.org/doi/abs/10.1021/ma0514018
3. Influence of the Molecular Structure of Polyolefins on the Damping
Function in Shear
Macro... 阅读全帖 |
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y***o
发帖数: 416 | 7 1. Comparative Theoretical Study on Homopolymerization of α-Olefins by Bis(
cyclopentadienyl) Zirconocene and Hafnocene: Elemental Propagation and
Termination Reactions between Monomers and Metals
Organometallics, 2010, 29 (7), pp 1541–1550
DOI: 10.1021/om900843h
http://pubs.acs.org/doi/pdf/10.1021/om900843h
2. Influence of the Ligand Structure of Hafnocene Polymerization Catalysts:
A Theoretical Study on Ethene Insertion and Chain Propagation
Organometallics, 2008, 27 (14), pp 3390–3398
DOI: 10... 阅读全帖 |
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y***o
发帖数: 416 | 9 1. Metalloorganic Polymerization Catalysis as a Tool To Probe
Crystallization Properties of Polymers: The Case of Isotactic Poly(1-butene)
Angewandte Chemie International Edition
Volume 48, Issue 52, pages 9871–9874, December 21, 2009
http://onlinelibrary.wiley.com/doi/10.1002/anie.200904300/pdf
2. Heterogeneous Ziegler-Natta, metallocene, and post-metallocene catalysis:
Successes and challenges in industrial application
MRS Bulletin / Volume 38 / Issue 03 / March 2013, pp 229-233
http://dx.doi.... 阅读全帖 |
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y***o
发帖数: 416 | 10 1. o-Phenylene-Bridged Cp/Amido Titanium Complexes for Ethylene/1-Hexene
Copolymerizations
Organometallics, 2006, 25 (9), pp 2133–2134
DOI: 10.1021/om0601854
http://pubs.acs.org/doi/pdf/10.1021/om0601854
2. Synthesis of Hafnium and Zirconium Imino−Amido Complexes from Bis-
imine Ligands. A New Family of Olefin Polymerization Catalysts
Organometallics, 2007, 26 (16), pp 3896–3899
DOI: 10.1021/om7004723
http://pubs.acs.org/doi/pdf/10.1021/om7004723
非常感谢您的帮助！ |
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n*u
发帖数: 373 | 12 Tobin做olefin polymerization好些个专利是转让给石油公司的，给西北挣了不少专利
费。他自己也搞了个做organic electronics的公司。他的四个组都是完面向应用。只
不过他算是做science的，不像做engineering的那样离实用那么近。 |
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q****e
发帖数: 3660 | 13 Jojoba oil olefin metathesis: a valuable source for bio-renewable materials
Danielle Butilkova and N. Gabriel Lemcoff*a
Show Affiliations
Green Chem., 2014,16, 4728-4733
DOI: 10.1039/C4GC01182A
Received 25 Jun 2014, Accepted 30 Jul 2014
First published online 31 Jul 2014
[email protected]
/* */ |
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e***s
发帖数: 689 | 17 这里大家只想改变自己 改变生活，你还是发到梦板吧。 |
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O*******f
发帖数: 926 | 18 wow，看起来很高大上的节奏。
互联网改变世界，我信了。这个技术咋改变世界？ |
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O*******f
发帖数: 926 | 19 来看看石油吧，石油的地位比塑料橡胶更重要哈。至少还有个石油经济学这么个说法，
还没有塑料经济学或者轮胎经济学的说法。世界原油价格都从110美元减少到40美元以
下了，似乎世界也没有改变多少。而石油价大跌导致的负面影响更严重。
技术创新真的很好很鼓舞，但先产业化然后市场化最后到影响世界，还有很长的路要走
。如果申funding，这个吹嘘夸大可以有。 |
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k*******n
发帖数: 2399 | 20 老包再发10篇管这里人屁事？
都老婆孩子过日子了，保住自己饭碗。
★ 发自iPhone App: ChineseWeb 1.0.6 |
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e***s
发帖数: 689 | 26 这里大家只想改变自己 改变生活，你还是发到梦板吧。 |
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O*******f
发帖数: 926 | 27 wow，看起来很高大上的节奏。
互联网改变世界，我信了。这个技术咋改变世界？ |
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O*******f
发帖数: 926 | 28 来看看石油吧，石油的地位比塑料橡胶更重要哈。至少还有个石油经济学这么个说法，
还没有塑料经济学或者轮胎经济学的说法。世界原油价格都从110美元减少到40美元以
下了，似乎世界也没有改变多少。而石油价大跌导致的负面影响更严重。
技术创新真的很好很鼓舞，但先产业化然后市场化最后到影响世界，还有很长的路要走
。如果申funding，这个吹嘘夸大可以有。 |
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k*******n
发帖数: 2399 | 29 老包再发10篇管这里人屁事？
都老婆孩子过日子了，保住自己饭碗。
★ 发自iPhone App: ChineseWeb 1.0.6 |
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q****i
发帖数: 6923 | 32 (3) Senior Polymer Scientist (Cleveland, OH)
Duties/Responsibilities:
•My exciting new Client is searching for a dynamic individual with
experience in organic and polymer synthesis, and polymer application
development. This Senior Polymer Scientist will be part of an application
development group of scientists and chemists. Responsibilities will include
conducting laboratory synthesis and polymer characterization, interpreting
and reporting results, maintaining instrumentation, documenting... 阅读全帖 |
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b**s
发帖数: 589 | 33 I used to work on the subject of gas phase fluidized bed olefin
polymerization, so I think polymer颗粒 fludization is not a big deal. you can
easily do it.
Try Polystyrene (because it can be polymerized directly into particle
form), But I think all the polymers are 透明或半透明，或白色的 if they are
pure.
静电, in my opion , is not a problem if you use steel fluildized bed
小
，要大于50微米吧，找了半天没有结果。现在在考虑是否可以用polymer颗粒，因为polym
明
或半透明，或白色的，因为要用激光测量技术，要求颗粒具备一定的光学性能refractive
。
谢 |
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w********h
发帖数: 12367 | 34 Ghasem NM
Effect of polymer growth rate and diffusion resistance on the behavior of
industrial polyethylene fluidized bed reactor
CHEM ENG TECHNOL 24: (10) 1049-1057 OCT 2001
Kim JY, Choi KY
Modeling of particle segregation phenomena in a gas phase fluidized bed olefin
polymerization reactor
CHEM ENG SCI 56: (13) 4069-4083 JUL 2001
Fernandes FAN, Lona LMF
Fluidized-bed reactor modeling for polyethylene production
J APPL POLYM SCI 81: (2) 321-332 JUL 11 2001
Fernandes FAN, Lona LMF
Heterogeneous |
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z*x
发帖数: 199 | 35 Single site catalysis is definitely important.
For Ewen, he also found Cs type catalyst which can get syndiotactic pp.
He also got president medal last year,I think
he should have more chance than TJ Marks
for
possible
olefin
million
polyolefins. |
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c*******n
发帖数: 1648 | 36 right, I recently read an article about ROMP's history when I was reviewing my
polymer chemistry. It's pretty interesting, and now I have some new thoughts
about the role of Grubbs. Furthermore,unlike MAO catalysts, ROMP couldn't been
widely used in industrial applications. After reading this article, I strongly
agree with agostic, Kaminsky deserve Nobel better than Grubbs.
article: http://pubs.acs.org/cen/coverstory/8051/8051olefin2.html
OLEFIN METATHESIS: THE EARLY DAYS
chemistry, |
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c*******n
发帖数: 1648 | 37 As i know they do polymer stuff, partially of course
ALIVISATOS at UC system: Nano
LIEBER at harvard inorganic, hybrid material
ISRAELACHVILI at UC santa babara : colloid system
BRUS NYU organic used to be in OLEFIN METATHESIS? |
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w********h
发帖数: 12367 | 38 check those papers of Fetters.
Fetters LJ, Lohse DJ, Garcia-Franco CA, et al.
Prediction of melt state poly(alpha-olefin) rheological properties: The
unsuspected role of the average molecular weight per backbone bond
MACROMOLECULES 35 (27): 10096-10101 DEC 31 2002
Fetters LJ, Lohse DJ, Milner ST, et al.
Packing length influence in linear polymer melts on the entanglement,
critical, and reptation molecular weights
MACROMOLECULES 32 (20): 6847-6851 OCT 5 1999
FETTERS LJ, LOHSE DJ, RICHTER D, et al |
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d*****h
发帖数: 1892 | 39 在类似的MMA的体系中，有少量的烯烃类分子，如果采用光照聚合的方法聚合MMA分子的
时候，烯烃分子是不是也能够和MMA交联上呢？如果不能怎么样才能交联上呢？多谢了
。 |
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i********t
发帖数: 1148 | 41 为什么说这个late transition metal Ru-based carbene complexes比起其他的early
transition metal Ti(Mo, W)之类的催化剂对olefin的反应活性更高呢？这个是不是和
它特有的d orbital有关系？如果是的话，应该怎么解释呢？ |
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w********h
发帖数: 12367 | 42 C&ENews上面有个叫Hung Yu Chen的卟告，
里面有句话：
In the 1960s, he worked with Nissim Calderon and Kenneth Scott on research
that resulted in a paper in Tetrahedron Letters, "Olefin metathesis - a
novel reaction for skeletal transformations of unsaturated hydrocarbons".
莫非在暗示他应该share2005年的诺贝尔化学奖？ |
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w*******y
发帖数: 60932 | 43 adidas Men's Quarter Athletic Sock, 6-Pack $7.99
adidas Men's No Show Athletic Sock, 6-Pack $7.99
adidas Men's Crew Athletic Socks, 6-Pack $7.99
- Polyester/linen/olefin/natural latex/spandex
- Half cushion cotton quarter
- Welt cuff adds durability
- Knit-in 3-bars on cuff
- Fits shoe size of 6-12 Imported
Product DescriptionAthletic socks by adidas are perfect for everyday and
athletic activities.
Link:
http://www.amazon.com/gp/search/ref=sr_nr_p_8_2?rh=n:3375251,n:!3375301,n:2206626011,k:adid... 阅读全帖 |
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w*******y
发帖数: 60932 | 44 I don't know if it is a clearance to get rid of certain models and sizes or
a mistake but the quantities are very limited. The smaller sizes are more
expensive than the clearance size. The 8 x 11 usually sell for $300-$600
elsewhere.
Mohawk are considered to be high quality machine woven rugs. All the rugs
are made of 100% Olefin. They are made in the USA.
Mohawk Frasier Machine Woven Rug:
http://www.amazon.com/Mohawk-Frasier-Machine-Woven-710/dp/B000R
- Only 2'1 x 7'10 runner
List Price: ... 阅读全帖 |
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