Solvent induced phase separation in a nylon 6-b-polyimide-b-nylon 6 triblock copolymer

Fu, Qiang; Livengood, Bryan P.; Shen, Ching-Chang; Lin, F.; Li, Weihan; Harris, Frank W.; Cheng, Stephen Z. D.; Hsiao, Benjamin S.

doi:10.1007/s10965-006-0001-7

“…The combined synchrotron SAXS and WAXD technique is an ideal tool to study the structural and morphological changes during crystallization and melting in polymers. The published articles in this area are abundant: (poly(aryl ether ketones), − polyimides, , aromatic polyesters, − ethylene-based copolymers, − biodegradable aliphatic polyesters, , poly(ethylene oxides) and copolymers, − and polyamides − ). In this section, we will emphasize some new findings in the field of polymer crystallization from the use of synchrotron SAXS.…”

Section: Polymer Crystallizationmentioning

confidence: 99%

Small-Angle X-ray Scattering of Polymers

Chu

¹

,

Hsiao

²

2001

Self Cite

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Benjamin Chu obtained his B.S. degree, magna cum laude, from St. Norbert College and his Ph.D. degree in Physical Chemistry from Cornell University. He was a postdoctoral student with the late Professor Peter J. W. Debye for four years before he started his academic career at the University of Kansas. In 1968, he moved to the State University of New York at Stony Brook, where he is now a Distinguished Professor.

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“…Determination of final conversion ratio of monomers: place resin fragments in the weighing bottle, after drying it to constant weight G 0 at 150℃ constant temperature, place it in the Soxhlet extractor to extract for 7 hours with distilled water as the solvent, take out the sample and dry it to constant weight G 1 at 150℃ constant temperature again, calculate conversion ratio X, as shown in Equation (1).…”

Section: Analysis Characterizationmentioning

confidence: 99%

“…Fu, F.W. Harris et al [1,2], Y. pae [3,4] et al studies a series of nylon 6-PI-nylon 6 triblock copolymers and nylon 6/PI graft copolymers and obtained a series of copolymers with different compatibility and phase behavior. In this paper, bisphenol A dianhydride and bisphenol A diamine with excellent water resistance are selected as the reactant monomer, through polymerization of which active prepolymer of polyesterimide is obtained, and through polymerization of the prepolymers PI modified nylon resin is further obtained.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Performance Research of Polyimide Modified Nylon Resin

Zhao

¹

,

Li²,

Zhang³

2011

AMR

0

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High performance trend of plastics has become a hot spot of current research. Select bisphenol A dianhydride and bisphenol A diamine with excellent water resistance as the reactant monomers to obtain anhydride-terminated polyimide with very high molecular weight by two-step polymerization, graft the active radicals of acyl caprolactam using the activity of anhydride and obtain PI modified nylon resin by polymerization. It is proved that the reaction in each above step is successful through infrared analysis. Through microscopic analysis, the molecules of polyimide does not enter crystallization phase of nylon resin, but forms compact lamellar crystals existing in nylon matrix.

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“…Fu, F.W. Harris et al [1,2], Y. pae [3,4] et al studies a series of nylon 6-PI-nylon 6 triblock copolymers and nylon 6/PI graft copolymers and obtained a series of copolymers with different compatibility and phase behavior. In this paper, bisphenol A dianhydride and bisphenol A diamine with excellent water resistance are selected as the reactant monomer, through polymerization of which active prepolymer of polyesterimide is obtained, and through polymerization of the prepolymers PI modified nylon resin is further obtained.…”

Section: Introductionmentioning

confidence: 99%

“…Conduct blank test at the same time. Calculate the average molecular weight Mn, as shown in Equation (1).…”

Section: Introductionmentioning

confidence: 99%

Research on <i>In Situ</i> Anionic Polymerization of PA6/PI Alloy

Zhao

¹

,

Li²,

Wang³

2011

AMR

0

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High performance trend of plastics has become a hot spot of current research. Select bisphenol A dianhydride and bisphenol A diamine with excellent water resistance as the reactant monomers to obtain anhydride-terminated polyimide with very high molecular weight by two-step polymerization, graft the active radicals of acyl caprolactam using the activity of anhydride and obtain PI modified nylon resin by polymerization.When the system temperature is above 160 °C and the added modifiers are greater than 10%, the system viscosity increases very fast; when the system temperature reaches 140 °C and the added modifiers are at 5%, the system viscosity increases very slowly. It is proved that the reaction in each above step is successful through infrared analysis. The mechanical properties of modified PI nylon increases with the increase of consumption and molecular weight of polyimide, when the molecular weight is selected to be about 8000~10000 and the adding amount is 10wt%~15 wt%, the tensile strength reaches over 85MPa, the notch impact strength is increased to 19.6kJ.m-2 and the elongation at break reaches 18%, which are remarkably better than general engineering plastics.Through microscopic analysis, the molecules of polyimide does not enter crystallization phase of nylon resin, but forms compact lamellar crystals existing in nylon matrix.

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Solvent induced phase separation in a nylon 6-b-polyimide-b-nylon 6 triblock copolymer

Cited by 9 publications

References 12 publications

Small-Angle X-ray Scattering of Polymers

Small-Angle X-ray Scattering of Polymers

Preparation and Performance Research of Polyimide Modified Nylon Resin

Research on <i>In Situ</i> Anionic Polymerization of PA6/PI Alloy

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