Theta solvent - Revision history

Carl McBride: Added some internal links.

2009-11-05T16:45:39Z

Added some internal links.

← Older revision		Revision as of 18:45, 5 November 2009
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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.		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.
	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.		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==
	~~#[http:~~/~~/nobelprize.org/nobel_prizes/chemistry/laureates/1974/flory-lecture.html Paul J. Flory Nobel Lecture]~~		<references/>
	[[category: polymers]]		[[category: polymers]]

Carl McBride: Slight addition.

2008-08-05T16:38:50Z

Slight addition.

← Older revision		Revision as of 18:38, 5 August 2008
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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''."		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 temperature of a given polymer-solvent system.		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.
	==References==		==References==
	#[http://nobelprize.org/nobel_prizes/chemistry/laureates/1974/flory-lecture.html Paul J. Flory Nobel Lecture]		#[http://nobelprize.org/nobel_prizes/chemistry/laureates/1974/flory-lecture.html Paul J. Flory Nobel Lecture]
	[[category: polymers]]		[[category: polymers]]

62.204.202.244 at 11:03, 9 August 2007

2007-08-09T11:03:38Z

← Older revision		Revision as of 13:03, 9 August 2007
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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''."		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''."
	An excluded volume of zero connotes a [[second virial coefficient]] of zero.		An excluded volume of zero connotes a [[second virial coefficient]] of zero. The theta state also corresponds to the highest upper critical temperature of a given polymer-solvent system.
	==References==		==References==
	#[http://nobelprize.org/nobel_prizes/chemistry/laureates/1974/flory-lecture.html Paul J. Flory Nobel Lecture]		#[http://nobelprize.org/nobel_prizes/chemistry/laureates/1974/flory-lecture.html Paul J. Flory Nobel Lecture]
	[[category: polymers]]		[[category: polymers]]

Carl McBride: New page: A '''theta solvent''' is the name for a condition (sometimes known as the Flory condition) rather than an actual solvent. At the ''theta point'', in the words of Paul Fl...

2007-07-30T15:12:23Z

New page: A '''theta solvent''' is the name for a condition (sometimes known as the Flory condition) rather than an actual solvent. At the ''theta point'', in the words of Paul Fl...

New page

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''."
An excluded volume of zero connotes a [[second virial coefficient]] of zero.
==References==
#[http://nobelprize.org/nobel_prizes/chemistry/laureates/1974/flory-lecture.html Paul J. Flory Nobel Lecture]
[[category: polymers]]