Phase behaviour in ternary polyamide 6/polyamide 66/elastomer blends

Tomova, D.; Kreßler, Jörg; Radusch, H.‐J.

doi:10.1016/s0032-3861(00)00127-0

Cited by 36 publications

(17 citation statements)

References 19 publications

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“…Because of the very rapid rate of the anionic polymerization of -caprolactam at a low polymerization temperature, amide interchange between two polyamides would not occur, so no random copolyamides would be formed. 7,8 With a slight increase in the PA 66 9 it can be concluded that the added PA 66 is not crystallized but dispersed in the PA 6 matrix at the molecular level.…”

Section: Resultsmentioning

confidence: 99%

Melting behavior and nonisothermal crystallization kinetics of polyamide 6/polyamide 66 molecular composites via in situ polymerization

Liu

Zhang

et al. 2005

J of Applied Polymer Sci

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ABSTRACT:The melting behavior and nonisothermal crystallization kinetics of pure polyamide 6 (PA 6) and its molecular composites with polyamide 66 (PA 66) were investigated with differential scanning calorimetry. The PA 6/PA 66 composites had one melting peak, whereas the coextruded PA 6/PA 66 blends had two melting peaks. With the addition of PA 66 to PA 6 via in situ anionic polymerization, the melting temperature, crystallization temperature, and crystallinity of PA 6 in the composites decreased. The half-time of nonisothermal crystallization increased for a PA 6/PA 66 molecular composite containing 12 wt % PA 66, in comparison with that of pure PA 6. The commonly used Ozawa equation was used to fit the nonisothermal crystallization of pure PA 6 and its composites. The Ozawa exponent values in the primary stage were equal to 1.28 -3.03 and 1.28 -2.97 for PA 6 and its composite with 12 wt % PA 66, respectively, and this revealed that the mechanism of primary crystallization of PA 6 and PA 6/PA 66 was mainly heterogeneous nucleation and growth. All the results indicated that the incorporation of PA 66 into PA 6 at the molecular level retarded the crystallization of PA 6.

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Section: Resultsmentioning

confidence: 99%

Melting behavior and nonisothermal crystallization kinetics of polyamide 6/polyamide 66 molecular composites via in situ polymerization

Liu

Zhang

et al. 2005

J of Applied Polymer Sci

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“…This decrease in Tg of the polymers may be explained if one considers the difference in the thermal expansion coefficient of the respective polymers in a blend, resulting in thermal stress across the boundary and development of a negative pressure within the rubber domains. Thus, the free volume of the rubber component increases and, consequently, the motion of the rubber chain becomes easier [109]. It is observed that the separation factor between the two Tg peaks is increased in all blends containing layered silicate, and that the difference between those Tg is maximum for the 50/50 rubber blend.…”

Section: Effect Of Layered Fillers In Non-linear Viscoelasticity Of Bmentioning

confidence: 93%

“…The results are compared with the corresponding gum rubber matrix without any filler. Gum as well as filled CR rubber matrices show a Tg at À25 C, whereas XNBR shows the transition at À1 C. In both cases, the incorporation of 10 phr organoclay and storage modulus versus temperature (bottom) for XNBR and CR compounds vulcanized by sulfur [109] remarkably reduces the peak heights, which indicates strong reinforcement by the organoclay. The presence of intercalated organoclays restricts the mobility of the rubber chains due to their confinement between the layers.…”

Section: Effect Of Layered Fillers In Non-linear Viscoelasticity Of Bmentioning

confidence: 93%

“…From this figure the clear crystalline nature of CR at the blend composition 75 CR/25 XNBR can also be observed. Morphological heterogeneity makes the CR phase more crystalline with the higher content of CR, in spite Storage modulus versus temperature plots of selfcrosslinked CR-XNBR blends (bottom) [109] of a strong sulfur crosslinking network in the blend matrix. However, above 40 C the storage modulus of filled blends show a higher E0 value as compared to the corresponding gum blends, demonstrating the apparent reinforcing ability of organoclay in all blends irrespective of their composition.…”

Section: Effect Of Layered Fillers In Non-linear Viscoelasticity Of Bmentioning

confidence: 99%

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Non-linear Viscoelastic Behaviour of Rubber-Rubber Blend Composites and Nanocomposites: Effect of Spherical, Layered and Tubular Fillers

Nair

George

Joseph

2014

Advances in Polymer Science

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This chapter deals with the non-linear viscoelastic behaviour of rubberrubber blend composites and nanocomposites with fillers of different particle size. The dynamic viscoelastic behaviour of the composites has been discussed with reference to the filler geometry, distribution, size and loading. The filler characteristics such as particle size, geometry, specific surface area and the surface structural features are found to be the key parameters influencing the Payne effect. Non-linear decrease of storage modulus with increasing strain has been observed for the unfilled vulcanizates. The addition of spherical or near-spherical filler particles always increase the level of both the linear and the non-linear viscoelastic properties. However, the addition of high-aspect-ratio, fiber-like fillers increase the elasticity as well as the viscosity.

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“…[1][2][3] As the second component or copatibilizer polyolefins, [4][5][6][7][8][9][10] polystyrene and styrene polymers (ABS or SAN) [11][12][13][14][15][16][17] and different elastomers such as natural and nitril rubbers, 3,[18][19][20][21][22][23][24] or EPM, and EPDM copolymers [23][24][25][26][27] were oft used. To improve the blend properties, they were frequently functionalized with the anhydride, 11,15,18,23,25 oxazoline, 3,10,[12][13][14]17,20 or epoxy 4,6,8,9,11,19,24,…”

Section: Introductionmentioning

confidence: 99%

Reactive blending of polyamides with epoxidized elastomers

Steller

Micewicz

Meissner

2007

J of Applied Polymer Sci

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Melt blending of aliphatic polyamides (PA6, PA66, PA12) with epoxidized and nonepoxidized elastomers (SBS, BS, PB) was investigated. IR and rheological studies have shown that epoxidized elastomers can simultaneously react both with polyamides and within their own phases during melt blending. Relative intensity of both processes is the main factor, which determines structure and properties of blends. SEM observations indicated that use of epoxidized elastomers improves blend homogeneity and decreases mean size of dispersed elastomer phase in comparison with nonepoxidized elastomers. Mechanical properties of epoxidized elastomers based blends are generally better with respect to similar blends with nonepoxidized elastomers. They depend on blend composition and type of polyamide and elastomer. Elastomer addition decreases tensile strength of all systems but in some cases, a considerable rise of impact strength was measured. Epoxidized SBS block copolymer was found to be the most effective modifier, especially with respect to PA6 and PA12.

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Phase behaviour in ternary polyamide 6/polyamide 66/elastomer blends

Cited by 36 publications

References 19 publications

Melting behavior and nonisothermal crystallization kinetics of polyamide 6/polyamide 66 molecular composites via in situ polymerization

Melting behavior and nonisothermal crystallization kinetics of polyamide 6/polyamide 66 molecular composites via in situ polymerization

Non-linear Viscoelastic Behaviour of Rubber-Rubber Blend Composites and Nanocomposites: Effect of Spherical, Layered and Tubular Fillers

Reactive blending of polyamides with epoxidized elastomers

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