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A '''theta solvent''' is the name for a condition (sometimes known as the [[Paul J. Flory |Flory]] condition) rather than an actual solvent. At the ''theta point'', in the words of Paul Flory: "''excluded volume interactions are neutralized''" <ref>[http://nobelprize.org/nobel_prizes/chemistry/laureates/1974/flory-lecture.html Paul J. Flory Nobel Lecture]</ref>. Thus when [[polymers |polymer]] is added to a theta solvent it  will maintain the same  average [[end-to-end distance]], unlike in a ''poor solvent'', where this distance is reduced, or in a ''good solvent'' where this length increases.
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A '''theta solvent''' is the name for a condition (sometimes known as the [[Paul J. Flory |Flory]] condition) rather than an actual solvent. At the ''theta point'', in the words of Paul Flory: "''excluded volume interactions are neutralized''" (Ref. 1). Thus when polymer is added to a theta solvent it  will maintain the same  average end-to-end distance, unlike in a ''poor solvent'', where this distance is reduced, or in a ''good solvent'' where this length increases.
An [[excluded volume]] of zero connotes a [[second virial coefficient]] of zero. The theta state also corresponds to the highest upper [[Critical points |critical temperature]] of a given polymer-solvent system.
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An excluded volume of zero connotes a [[second virial coefficient]] of zero. The theta state also corresponds to the highest upper [[Critical points |critical temperature]] of a given polymer-solvent system.
==See also==
 
*[[Boyle temperature]]
 
 
==References==
 
==References==
<references/>
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#[http://nobelprize.org/nobel_prizes/chemistry/laureates/1974/flory-lecture.html Paul J. Flory Nobel Lecture]
 
[[category: polymers]]
 
[[category: polymers]]

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