نتایج جستجو برای: block copolymers

تعداد نتایج: 164252  

Journal: :Journal of Polymer Science Part B: Polymer Physics 2006

Journal: :Langmuir : the ACS journal of surfaces and colloids 2004
Cheryl M Stancik Adrien R Lavoie Jan Schütz Paulina A Achurra Peter Lindner Alice P Gast Robert M Waymouth

We synthesize a series of block copolymers comprising a polystyrene (PS) block and an imidazolium-functionalized PS (IL) block and characterize their assembly properties. We use small-angle neutron scattering and dynamic light scattering to determine the micelle size and shape in dilute solutions and to assess the micelle interactions in concentrated solutions. By studying a series of copolymer...

Journal: :Progress in Polymer Science 2003

Journal: :Journal of Polymer Science: Polymer Chemistry Edition 1977

Journal: :Journal of Materials Science: Materials in Medicine 1993

Journal: :Journal of the American Chemical Society 2009
Yan Xia Bradley D Olsen Julia A Kornfield Robert H Grubbs

Efficient, one-pot preparation of synthetically challenging, high molecular weight (MW), narrowly dispersed brush block copolymers and random copolymers in high conversions was achieved by ring-opening metathesis (co)polymerization (ROMP) of various macromonomers (MMs) using the highly active, fast-initiating ruthenium olefin metathesis catalyst (H(2)IMes)(pyr)(2)(Cl)(2)RuCHPh. A series of rand...

Journal: :Macromolecular rapid communications 2010
Chaoxu Li Jingguo Li Xiuqiang Zhang Afang Zhang Raffaele Mezzenga

We investigate the complexation of ampholytic poly(N-isopropylacylamide)-block-poly- (L-glutamic acid)-block-poly(L-lysine) (PNiPAM-b-PLG-b-PLLys) triblock copolymers and PNiPAM-block-(PLG-co-PLLys) diblock copolymers with counter charged anionic and cationic surfactants. Both triblock and diblock copolymers are able to selectively form complexes through either L-glutamic acid-cationic surfacta...

2002
Hailiang Zhang Yingfeng Tu Xinhua Wan Qi-Feng Zhou E. M. Woo

The synthesis of a series of new rod-coil diblock copolymers with different molecular weights and low polydispersity was achieved by atom transfer radical polymerization. The block architecture (coil-conformation of styrene segment and rigid-rod conformation of 2,5-bis[(4-methoxyphenyl)-oxycarbonyl]styrene segment) of the diblock copolymers was experimentally confirmed by proton nuclear magneti...

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