Molekülordnung und Kristallinität in Polyhexamethylenadipamid

Haberkorn, H.; Illers, K. H.; Šimák, P.

doi:10.1007/bf01383353

Cited by 34 publications

(15 citation statements)

References 26 publications

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“…The first of these refers to the melting of crystal sites that were formed during cooling, and the second to crystal sites that were optimized during heating. These findings are in agreement with Haberkorn et al, 31 who has found two different crystal phases for PA-6,6, defined as ␣ 1 and ␣ 2 . The first one, ␣ 1 , is a higly ordered phase, while ␣ 2 is a less ordered phase; each one formed at different annealing temperatures and times.…”

Section: Thermal Analysissupporting

confidence: 94%

Rubber toughening of glass fiber reinforced nylon‐6,6 with functionalized block copolymer SEBS‐g‐MA

et al. 2002

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ABSTRACT:The toughening of glass fiber reinforced nylon-6,6 (PA-6,6) by using the functionalized triblock copolymer styrene-(ethylene-co-butylene)-styrene, grafted with maleic anhydride (SEBS-g-MA) was examined. Blends containing 2.5, 5, 7.5, 10, and 12.5 wt% copolymer were prepared by melt blending in a single-screw extruder. Emphasis was given to the study of mechanical properties in comparison with morphology and thermal properties of the aforementioned samples. Although the amount of SEBS-g-MA that was added in PA-6,6 was not enough to produce a super-tough material, a significant increase in the resistance to crack propagation and impact strength was observed in all blends. This behavior was proportional to the amount of SEBS-g-MA that was added for samples having up to 10%, rubber, while additional amounts seem to have no further effect. A small decrease in tensile strength was also observed. From FTIR spectroscopy and DSC analysis it was shown that the grafting extent of SEBS-g-MA to PA-6,6 was very low.

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Section: Thermal Analysissupporting

confidence: 94%

Rubber toughening of glass fiber reinforced nylon‐6,6 with functionalized block copolymer SEBS‐g‐MA

et al. 2002

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“…From the heat of fusion, an apparent crystallinity was determined. The heat of fusion for the totally crystalline PA66 was taken from the literature 15 as 191.0 J/g.…”

Section: Dscmentioning

confidence: 99%

Infrared spectroscopic characterization of oriented polyamide 66: Band assignment and crystallinity measurement

Vasanthan

Salem

2000

J. Polym. Sci. B Polym. Phys.

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“…Substantial improvements in the mechanical properties of PA66 have been achieved through various fiber-forming routes involving spinning followed by drawing. Although extensive structural studies of this material have been carried out for nearly six decades, many questions remain unanswered [1][2][3].…”

Section: Introduction and Previous Workmentioning

confidence: 99%

Structure characterization of heat set and drawn polyamide 66 fibers by FTIR spectroscopy

Vasanthan

Salem

2001

Materials Research Innovations

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Structural changes that occur during thermally induced and strain induced crystallization of polyamide 66 fibers were studied by infrared spectroscopy, density measurement and optical microscopy. Two bands at 924 and 1136 cm -1 were shown to arise from the amorphous phase and assignment of the bands at 936 and 1200 cm -1 to the crystalline phase were confirmed. We demonstrated that two different infrared spectroscopic methods could be used to determine the total crystallinity of polyamide 66 fibers. One is a calibration method in which the band ratio of 1200 and 1630 cm -1 is plotted against the crystallinity measured by density measurements. The other one is an independent infrared method. Crystallinity obtained by the independent infrared spectroscopic method showed good agreement with crystallinity observed by density measurement. Infrared dichroism was used to obtain the crystalline orientation using the band at 936 cm -1 . The transition moment angle of 48°was found for the band at 936 cm -1 with respect to chain axis. Amorphous orientation was obtained using Stein's equation.

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Molekülordnung und Kristallinität in Polyhexamethylenadipamid

Cited by 34 publications

References 26 publications

Rubber toughening of glass fiber reinforced nylon‐6,6 with functionalized block copolymer SEBS‐g‐MA

Rubber toughening of glass fiber reinforced nylon‐6,6 with functionalized block copolymer SEBS‐g‐MA

Infrared spectroscopic characterization of oriented polyamide 66: Band assignment and crystallinity measurement

Structure characterization of heat set and drawn polyamide 66 fibers by FTIR spectroscopy

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