Polypropylene ionic thermoplastic elastomers: Synthesis and properties

Rousseaux, Dimitri; Drooghaag, Xavier; Sclavons, Michel; Godard, Pierre; Carlier, Vincent; Marchand‐Brynaert, Jacqueline

doi:10.1016/j.polymdegradstab.2009.11.031

Cited by 19 publications

(15 citation statements)

References 13 publications

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“…Consequently, the foam has a high open rate and cannot satisfy the requirements for application. 31,33,[41][42][43][44][45][46][47] More importantly, these methods for increasing the melt strength of PP do not lower the foaming temperature, which is bad for energy saving. [30][31][32][33][34][35] The methods for modifying PP include polymerization, partial crosslinking, and blending PP with high-melt viscosity polymers.…”

Section: Introductionmentioning

confidence: 99%

Strategy for the preparation of lightweight polypropylene/polyethylene‐octene elastomer composite foams with different phase morphologies using supercritical carbon dioxide

Wang

2019

J of Applied Polymer Sci

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Polypropylene (PP)/polyethylene-octene elastomer (POE) composites with a "sea-island" structure and a cocontinuous structure were prepared. With the selection of a suitable foaming temperature, the supercritical carbon dioxide foaming of PP/POE composites with different phase morphologies occurred only in the POE phase. The effects of the POE content, foaming temperature, pressure, and number of layers on the cell size, cell density, apparent density, foaming layer density, and foaming ratio under different phase morphologies were investigated by scanning electron microscopy, polarized optical microscopy, differential scanning calorimetry, and dynamic thermomechanical analysis. This article provides a novel approach for foaming PP at a low temperature. For PP/POE-blended composites with a "sea-island" structure, the foaming temperature is as low as 80 C, and for PP/POE alternating multilayered composites with a cocontinuous structure, foaming can occur at 40 C. Compared with the conventional methods for foaming PP, this method avoids the problems of a high foaming temperature, a narrow range of the foaming temperature, and a low melt strength of the PP. Thus, the PP foaming method was successfully improved, yielding a new technique for the preparation of lightweight PP.

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Section: Introductionmentioning

confidence: 99%

Strategy for the preparation of lightweight polypropylene/polyethylene‐octene elastomer composite foams with different phase morphologies using supercritical carbon dioxide

Wang

2019

J of Applied Polymer Sci

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“…The larger decrease of the anhydride band and the more intense carboxylate band in R-OP2 than in R-OP1 indicates a greater efficiency of NaAc$3H 2 O to neutralize PP-g-MA than NaAc. Indeed, the neutralization reaction requires water to ionize the base [21]. NC-OP0 and NC-OP1 spectra are similar to those of NC-SP0 and R-OP1 respectively.…”

Section: Pp-g-ma/carboxylate Clay Nanocompositesmentioning

confidence: 73%

“…The higher T-50 of R-OP1 and R-OP2 regarding R0 indicates an increase of the thermal stability of these PP-g-MA ionomer. This phenomenon results from ionic aggregation of the carboxylate moieties which holds together polymer segments resulting from matrix degradation [21]. T-5, T-10 and T-50 of NC-OP1 and NC-OP2 are significantly higher than the corresponding R-OP1, R-OP2 and NC-OP0 samples.…”

Section: Thermal and Rheological Properties Of Pp-g-ma/carboxylate CLmentioning

confidence: 98%

“…Compatibilisers are required due to the huge difference of polarity between the polyolefin matrix and the clay. PP-g-MA allows wetting of the clay surface by hydrogen-bond interactions between the anhydride functions (in fact, the acid functions are always present due to hydrolysis under the usual storage conditions [21]) and the oxygen atoms at the surface of the silicate layers. Also hydrogen-bond interactions could occur between the clay hydroxyl groups and the PP-g-MA carbonyl functions.…”

Section: Introductionmentioning

confidence: 99%

“…In the case of sodium acetate, PP-g-MA is partially neutralized into an ionomer form; only one of the two carboxylic acid functions of the anhydride can be neutralized [21]. The ionic groups of the ionomer compatibiliser offer favourable interactions with the clay [22].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Carboxylate clays: A model study for polypropylene/clay nanocomposites

Rousseaux

Sclavons

Godard

et al. 2010

Polymer Degradation and Stability

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Alkylaluminum activator effects on polyethylene branching using a N,N′‐nickel precatalyst appended with bulky 4,4′‐dimethoxybenzhydryl groups

Yuan

Duan

Zhang

et al. 2019

Applied Organom Chemis

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Ten unsymmetrical N,N'‐bis (imino) acenaphthene‐nickel (II) halide complexes, [1‐[2,6‐{(4‐MeOC6H4)2CH}2–4‐MeC6H2N]‐2‐(ArN)C2C10H6]NiX2, each appended with one N‐2,6‐bis(4,4'‐dimethoxybenzhydryl)‐4‐methylphenyl group, have been synthesized and characterized. The molecular structures of Ni1, Ni3, Ni5 and Ni6 highlight the variation in steric protection afforded by the inequivalent N‐aryl groups; a distorted tetrahedral geometry is conferred about each nickel center. On activation with diethylaluminum chloride (Et2AlCl) or methylaluminoxane (MAO), all complexes showed high activity at 30°C for the polymerization of ethylene with the least bulky bromide precatalysts (Ni1 and Ni4), generally the most productive, forming polyethylenes with narrow dispersities [Mw/Mn: < 3.4 (Et2AlCl), < 4.1 (MAO)] and various levels of branching. Significantly, this level of branching can be influenced by the type of co‐catalyst employed, with Et2AlCl having a predilection towards polymers displaying significantly higher branching contents than with MAO [Tm: 33.0–82.5°C (Et2AlCl) vs. 117.9–119.4°C (MAO)]. On the other hand, the molecular weights of the materials obtained with each co‐catalyst were high and, in some cases, entering the ultra‐high molecular weight range [Mw range: 6.8–12.2 × 105 g mol−1 (Et2AlCl), 7.2–10.9 × 105 g mol−1 (MAO)]. Furthermore, good tensile strength (εb up to 553.5%) and elastic recovery (up to 84%) have been displayed by selected more branched polymers highlighting their elastomeric properties.

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Polypropylene ionic thermoplastic elastomers: Synthesis and properties

Cited by 19 publications

References 13 publications

Strategy for the preparation of lightweight polypropylene/polyethylene‐octene elastomer composite foams with different phase morphologies using supercritical carbon dioxide

Strategy for the preparation of lightweight polypropylene/polyethylene‐octene elastomer composite foams with different phase morphologies using supercritical carbon dioxide

Carboxylate clays: A model study for polypropylene/clay nanocomposites

Alkylaluminum activator effects on polyethylene branching using a N,N′‐nickel precatalyst appended with bulky 4,4′‐dimethoxybenzhydryl groups

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