NSF Org:	CBET Division of Chemical, Bioengineering, Environmental, and Transport Systems
Recipient:
Initial Amendment Date:	September 5, 1985
Latest Amendment Date:	June 17, 1986
Award Number:	8508387
Award Instrument:	Standard Grant
Program Manager:	CBET  Division of Chemical, Bioengineering, Environmental, and Transport Systems ENG  Directorate for Engineering
Start Date:	September 1, 1985
End Date:	February 29, 1988 (Estimated)
Total Intended Award Amount:	$112,122.00
Total Awarded Amount to Date:	$112,122.00
Funds Obligated to Date:	FY 1985 = $58,556.00 FY 1986 = $53,566.00
History of Investigator:	Allan Myerson (Principal Investigator)
Recipient Sponsored Research Office:	Polytechnic University of New York 15 Metrotech Center Brooklyn NY  US  11201-3826 (718)260-3360
Sponsor Congressional District:	07
Primary Place of Performance:	DATA NOT AVAILABLE
Primary Place of Performance Congressional District:
Unique Entity Identifier (UEI):
Parent UEI:
NSF Program(s):	Interfacial Engineering Progra
Primary Program Source:
Program Reference Code(s):
Program Element Code(s):	141700
Award Agency Code:	4900
Fund Agency Code:	4900
Assistance Listing Number(s):	47.041

ABSTRACT

The aging of crystals--i.e., the structural changes which occur in crystals after nucleation and growth have occurred--will be studied. During aging, recrystallization occurs rapidly in imperfect crystals of sparingly soluble materials resulting in significant changes in crystal habit and purity. In this study, the aging of terephthalic acid crystals in water, acetic acid, and DMSO will be experimentally examined. Theoretical studies to attempt to predict the aging rate, mechanism, and final crystal shape and purity also will be conducted.

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