Accession Number:

ADA090015

Title:

Solid State Extrusion of Melt-Crystallized and Solution-Grown Crystals of Nylons 6 and 66.

Descriptive Note:

Interim technical rept.,

Corporate Author:

MASSACHUSETTS UNIV AMHERST DEPT OF POLYMER SCIENCE AND ENGINEERING

Personal Author(s):

• Shimada,Toshio
• Porter,Roger S.

Report Date:

1980-07-15

Pagination or Media Count:

31.0

Abstract:

Melt and solution grown crystals of nylons 6 and 66 have been solid state extruded to examine the relationships among thermal behavior, crystallinity, orientation and modulus. Unextruded and extruded samples were examined by thermal analysis, wide angle x-ray and by tensile testing. An extrusion draw ratio EDR of 4.0 was attained for all samples. At this EDR, modulus and crystallinity are linearly related over a wide range up to 60 crystallinity. The highest tensile modulus of 6.7 GPa was attained for both polymers in estrudates of solution-grown crystals, although these extrudates of compacted precipitates were less oriented. This suggests that the extent of both crystallinity and draw play an important role in the enhancement of modulus. Author

Descriptors:

• *NYLON
• *EXTRUSION
• *MELTS
• *CRYSTAL GROWTH
• *SOLID STATE CHEMISTRY
• THERMAL PROPERTIES
• RATIOS
• POLYMERS
• TENSILE PROPERTIES
• MODULUS OF ELASTICITY
• THERMAL ANALYSIS
• SAMPLING
• TENSILE TESTERS
• PRECIPITATES

Subject Categories:

• Plastics
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE