Effect of polydispersity on the phase behavior of polymer blends

Chieh Tsung Lo; Soenke Seifert; Pappannan Thiyagarajan; Balaji Narasimhan

doi:10.1002/marc.200400574

Effect of polydispersity on the phase behavior of polymer blends

Chieh Tsung Lo, Soenke Seifert, Pappannan Thiyagarajan, Balaji Narasimhan

Department of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

The effect of polydispersity on polymer blend phase behavior is studied by in situ small-angle X-ray scattering. In a polydisperse polyethylene (PE)/isotactic polypropylene) (iPP) blend, the enthalpic portion of the interaction parameter is greater than that of a corresponding blend with lower polydispersity. This is attributed to the presence of long chains, which provide a higher interaction energy and packing constraint, reducing the system miscibility. As expected, the radius of gyration is higher in the system with higher polydispersity.

Original language	English
Pages (from-to)	533-536
Number of pages	4
Journal	Macromolecular Rapid Communications
Volume	26
Issue number	7
DOIs	https://doi.org/10.1002/marc.200400574
Publication status	Published - 2005 Apr 6

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Materials Chemistry

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10.1002/marc.200400574

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AU - Thiyagarajan, Pappannan

AU - Narasimhan, Balaji

PY - 2005/4/6

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AB - The effect of polydispersity on polymer blend phase behavior is studied by in situ small-angle X-ray scattering. In a polydisperse polyethylene (PE)/isotactic polypropylene) (iPP) blend, the enthalpic portion of the interaction parameter is greater than that of a corresponding blend with lower polydispersity. This is attributed to the presence of long chains, which provide a higher interaction energy and packing constraint, reducing the system miscibility. As expected, the radius of gyration is higher in the system with higher polydispersity.

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Effect of polydispersity on the phase behavior of polymer blends

Abstract

All Science Journal Classification (ASJC) codes

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