Properties and Morphology of Impact-Modified RIM Nylon

Loos, Joachim; Geenen, Ab A. van

doi:10.1021/bk-1985-0270.ch012

Cited by 6 publications

(2 citation statements)

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“…[8] The reported structure for the two phase material corresponds to a continuous elastomeric network extended through the nylon 6 matrix. [9] Like nylon 6, NBC copolymers absorb humidity from the environment. [6,[10][11][12] This problem is a serious limitation for applications requiring a good dimensional stability.…”

Section: Introductionmentioning

confidence: 99%

Nylon 6‐Polyesteramide Block Copolymers (NBC) and NBC/Phenolic Resin Composites, 1

Estrada‐Monje

Navarro-Rodríguez

2004

Macro Materials & Eng

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Summary: A series of NBC/phenolic resin composites, containing 0, 1, 3, 5 or 7 wt.‐% of a powdered phenolic resin of different particle diameter, was prepared by the reaction injection molding (RIM) process. It was determined by SEM analysis that there exists a strong interaction between particles and matrix and that such interaction occurs through hydrogen‐type bonds as determined by FTIR analysis. According to the results it is thought that the glass transition temperature of the NBC/phenolic resin composites depends on two competing factors: the rigidity promoted by the hard solid filler and the flexibility imparted by the nylon 6 amorphous phase, whose proportion becomes more important with increasing amounts of phenolic resin particles. The elastic and flexural moduli of the NBC were improved by the addition of phenolic resin confirming the reinforcing effect of this filler. On the contrary, the impact strength diminishes with increasing amounts of phenolic resin, although this property is strongly dependent on the particle diameter.SEM micrograph of the nylon 6‐polyesteramide block copolymer (80/20).magnified imageSEM micrograph of the nylon 6‐polyesteramide block copolymer (80/20).

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Section: Introductionmentioning

confidence: 99%

Nylon 6‐Polyesteramide Block Copolymers (NBC) and NBC/Phenolic Resin Composites, 1

Estrada‐Monje

Navarro-Rodríguez

2004

Macro Materials & Eng

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“…Therefore, at least in principle, the above process may represent a very easy way to produce polymer mixtures, blends and composites based on PCL, with som peculiar morphologies and properties. Quite recently, the activated anionic polymerization of CL has been found suitable for the reaction injection molding (RIM) technology (9-12) and has prompted some new studies (13)(14)(15) devoted to update the classical picture of the reaction kinetics (J_6), mostly in terms of potential industrial applications of the RIM process (13)(14)(15)(17)(18)(19)(20).…”

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Activated Anionic Polymerization of ε-Caprolactam for RIM Process

Alfonso

Chiappori

Razore

et al. 1985

ACS Symposium Series

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Thermal, mechanical, and fracture properties of copolyureas formed by reaction injection molding: Effects of hard segment structure

Ryan

Bergstromcu

Willkomm

et al. 1991

J of Applied Polymer Sci

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SYNOPSISA series of copolyureas containing 50% by weight hard segment have been formed by RIM. The hard segment structure was systematically varied to investigate the effects of urea group density, hard segment crosslinking, relative reaction rates, and to compare the properties of aromatic and aliphatic hard segment materials. In each case the soft segment was based on a 2000 molecular weight polyether diamine. The RIM materials formed ranged from flexible elastomers to brittle plastics depending on composition and were characterized by SAXS, DSC, DMA, tensile stress-strain and fracture mechanics studies. SAXS, DSC, and DMA showed that microphase separation had occurred to give materials with a nonequilibrium morphology. DMA and tensile stress-strain studies showed the small strain properties to be very sensitive to the volume fraction of glassy material whereas the ultimate properties were dependent on chemical structure of the hard segment. Fracture properties were determined using the single-edge notch technique. In most cases ductile failure occurred with G, > 2.5 k J m-* and the fracture surfaces showed gross yielding and tearing. In the case of the copolyurea with the highest urea group content, brittle fracture occurred with G, = 0.06 kJ m-'.

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Properties and Morphology of Impact-Modified RIM Nylon

Cited by 6 publications

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Nylon 6‐Polyesteramide Block Copolymers (NBC) and NBC/Phenolic Resin Composites, 1

Nylon 6‐Polyesteramide Block Copolymers (NBC) and NBC/Phenolic Resin Composites, 1

Activated Anionic Polymerization of ε-Caprolactam for RIM Process

Thermal, mechanical, and fracture properties of copolyureas formed by reaction injection molding: Effects of hard segment structure

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