Ethylene–Propylene–Silsesquioxane Thermoplastic Elastomers

Macromolecular Chemistry and Physics - Tập 209 Số 12 - Trang 1198-1209 - 2008
Bradley Seurer1,2, E. Bryan Coughlin3
1Current Adress: Department of Chemistry, Winona State University, USA
2Department of Polymer Science and Engineering, University of Massachusetts Amherst, Amherst, MA 01003, USA.
3Department of Polymer Science and Engineering, University of Massachusetts-Amherst, Amherst, MA 01003, USA

Tóm tắt

AbstractPreparative methods for the incorporation of polyhedral oligomeric silsesquioxane (POSS) macromonomers into ethylene–propylene (EP) polymers have been developed that utilize metallocene polymerization. Analysis of these novel ethylene–propylene–POSS polymers using wide‐angle X‐ray diffraction reveals that pendant POSS groups off the polymer backbones aggregate with a phenyl periphery, and the polymers crystallize as anisotropically shaped nanocrystals. POSS particle aggregation is strongly dependent on the nature of the POSS peripheral group. X‐Ray studies suggest that aggregation of POSS in the EP elastomers did not occur with isobutyl and ethyl peripheries, as they disperse within the polymer matrix. The formation of POSS nanocrystals increases the mechanical properties of these thermoplastic elastomers. The tensile storage modulus increases significantly with the addition of POSS, as does the length of the rubbery plateau region. Tensile studies reveal an elongation at break of 720% for one EP‐phenyl POSS polymer sample, with the others between 400 and 500%.magnified image

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Tài liệu tham khảo

10.1081/MC-200033687

10.1039/b507309j

10.1039/b509097k

10.1021/cm011061e

10.1023/A:1015287910502

10.1016/j.cossms.2004.03.002

10.1023/A:1015237627340

10.1002/pola.10175

10.1021/ma00128a067

10.1021/ma048934l

10.1021/ma0110094

10.1002/pola.1272

10.1021/nl020208d

10.1021/ma960846g

10.1021/cm0208408

10.1002/(SICI)1097-0126(200005)49:5<453::AID-PI332>3.0.CO;2-H

10.1021/ma049753m

10.1021/ma0518813

10.1021/ma062393d

Bhowmick A., 2001, Handbook of Elastomers

Sperling L., 2001, Physical Polymer Science

Odian G., 2001, Principles of Polymerization

10.1021/ma048557c

Salamore J., 1996, Polymeric Materials Encyclopedia, 2264

10.1002/aic.10758

10.1021/ma060880n

10.1016/0022-328X(94)84087-3

10.1002/anie.199511431

10.1021/cr940442r

10.1002/(SICI)1521-3773(19990215)38:4<428::AID-ANIE428>3.0.CO;2-3

10.1002/pol.1985.170230807

US 6 060 572 (2000) invs.:D.Gillis R.Karpeles.

10.1002/(SICI)1097-4628(19990124)71:4<523::AID-APP1>3.0.CO;2-G

Vasile C., 2001, Handbook of Polyolefins

10.1021/ma034989w

Mullins L., 1956, Trans. IRI, 33, 2

Aklonis J., 1983, Introduction to Polymer Viscoelasticity

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Macromolecular Chemistry and Physics

Tập 209 Số 12

1198-1209

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