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Polyolefin miscibility: Solid-state ...

Wolak, Justyna Ewa.

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Polyolefin miscibility: Solid-state NMR investigation of phase behavior in saturated hydrocarbon blends.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Polyolefin miscibility: Solid-state NMR investigation of phase behavior in saturated hydrocarbon blends./
作者:	Wolak, Justyna Ewa.
面頁冊數:	229 p.
附註:	Source: Dissertation Abstracts International, Volume: 66-05, Section: B, page: 2611.
Contained By:	Dissertation Abstracts International66-05B.
標題:	Chemistry, Polymer. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3175985
ISBN:	0542142724

Polyolefin miscibility: Solid-state NMR investigation of phase behavior in saturated hydrocarbon blends.
Wolak, Justyna Ewa.

Polyolefin miscibility: Solid-state NMR investigation of phase behavior in saturated hydrocarbon blends. - 229 p.

Source: Dissertation Abstracts International, Volume: 66-05, Section: B, page: 2611.

Thesis (Ph.D.)--North Carolina State University, 2005.

Polyolefin blends represent a vital material field due to their economic and commercial importance. Potential new properties such as lighter weight, lower cost and higher strength, motivate research to investigate blends of saturated hydrocarbon polymers. However, many questions remain concerning how polymer chain structure and packing influence local thermodynamics, or more specifically, the interplay between enthalpy and entropy, which ultimately control bulk phase behavior. Solid-state NMR has proven to be an essential tool in these studies due to its ability to selectively observe molecular level conformations and dynamics without isotopic labeling. Combinations of basic and advanced variable temperature studies such as 1D and 2D 13C cross-polarization exchange experiments, static 2H lineshape analysis, 1H relaxation spin-diffusion measurements, and 129Xe experiments were applied in this work. Several systems were studied, including 50/50 weight percent blends of polyisobutylene with polyethylene-co-1-butene, polyisobutylene with head-to-head polypropylene, and atactic polypropylene with the same polyethylene-co-1-butene samples. The results were used to determine a relationship between miscibility, length scales of mixing, and timescales/length scales of the glass transition.

ISBN: 0542142724Subjects--Topical Terms:

1018428
Chemistry, Polymer.

Polyolefin miscibility: Solid-state NMR investigation of phase behavior in saturated hydrocarbon blends.
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520 $a Polyolefin blends represent a vital material field due to their economic and commercial importance. Potential new properties such as lighter weight, lower cost and higher strength, motivate research to investigate blends of saturated hydrocarbon polymers. However, many questions remain concerning how polymer chain structure and packing influence local thermodynamics, or more specifically, the interplay between enthalpy and entropy, which ultimately control bulk phase behavior. Solid-state NMR has proven to be an essential tool in these studies due to its ability to selectively observe molecular level conformations and dynamics without isotopic labeling. Combinations of basic and advanced variable temperature studies such as 1D and 2D 13C cross-polarization exchange experiments, static 2H lineshape analysis, 1H relaxation spin-diffusion measurements, and 129Xe experiments were applied in this work. Several systems were studied, including 50/50 weight percent blends of polyisobutylene with polyethylene-co-1-butene, polyisobutylene with head-to-head polypropylene, and atactic polypropylene with the same polyethylene-co-1-butene samples. The results were used to determine a relationship between miscibility, length scales of mixing, and timescales/length scales of the glass transition.
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