Extrusion polymerization: Catalyzed synthesis of crystalline linear polyethylene nanofibers within a mesoporous silica

被引：445

作者：

Kageyama, K ^{[1
]}

Tamazawa, J ^{[1
]}

Aida, T ^{[1
]}

机构：

[1] Univ Tokyo, Grad Sch Engn, Dept Chem & Biotechnol, Bunkyo Ku, Tokyo 1138656, Japan

来源：

SCIENCE | 1999年 / 285卷 / 5436期

关键词：

D O I：

10.1126/science.285.5436.2113

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Crystalline nanofibers of Linear polyethylene with an ultrahigh molecular weight (6,200,000) and a diameter of 30 to 50 nanometers were formed by the polymerization of ethylene with mesoporous silica fiber-supported titanocene, with methylalumoxane as a cocatalyst. Small-angle x-ray scattering analysis indicated that the polyethylene fibers consist predominantly of extended-chain crystals. This observation indicates a potential utility of the honeycomb-like porous framework as an extruder for nanofabrication of polymeric materials.

引用

页码：2113 / 2115

页数：3

共 32 条

[1] Helical polyacetylene synthesized with a chiral nematic reaction field [J].

Akagi, K ;

Piao, G ;

Kaneko, S ;

Sakamaki, K ;

Shirakawa, H ;

Kyotani, M .

SCIENCE, 1998, 282 (5394) :1683-1686

[2] A NEW FAMILY OF MESOPOROUS MOLECULAR-SIEVES PREPARED WITH LIQUID-CRYSTAL TEMPLATES [J].

BECK, JS ;

VARTULI, JC ;

ROTH, WJ ;

LEONOWICZ, ME ;

KRESGE, CT ;

SCHMITT, KD ;

CHU, CTW ;

OLSON, DH ;

SHEPPARD, EW ;

MCCULLEN, SB ;

HIGGINS, JB ;

SCHLENKER, JL .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1992, 114 (27) :10834-10843

[3] From microporous to mesoporous molecular sieve materials and their use in catalysis [J].

Corma, A .

CHEMICAL REVIEWS, 1997, 97 (06) :2373-2419

[4] Biomembrane templates for nanoscale conduits and networks [J].

Evans, E ;

Bowman, H ;

Leung, A ;

Needham, D ;

Tirrell, D .

SCIENCE, 1996, 273 (5277) :933-935

[5]

Fischer M, 1999, ANGEW CHEM INT EDIT, V38, P885, DOI 10.1002/(SICI)1521-3773(19990401)38:7<884::AID-ANIE884>3.0.CO

[6]

2-K

[7] 13C NMR determination of the composition of linear low-density polyethylene obtained with [η3-methallyl-nickel-diimine]PF6 complex [J].

Galland, GB ;

de Souza, RF ;

Mauler, RS ;

Nunes, FF .

MACROMOLECULES, 1999, 32 (05) :1620-1625

[8] Photoisomerization in dendrimers by harvesting of low-energy photons [J].

Jiang, DL ;

Aida, T .

NATURE, 1997, 388 (6641) :454-456

[9] Mesoporous zeolite as a new class of catalyst for controlled polymerization of lactones [J].

Kageyama, K ;

Ogino, S ;

Aida, T ;

Tatsumi, T .

MACROMOLECULES, 1998, 31 (13) :4069-4073

[10] Propene polymerization catalyzed over MCM-41 and VPI-5-supported Et(ind)(2)ZrCl2 catalysts [J].

Ko, YS ;

Han, TK ;

Park, JW ;

Woo, SI .

MACROMOLECULAR RAPID COMMUNICATIONS, 1996, 17 (11) :749-758

← 1 2 3 4 →