Efficient hydrosilylation reaction in polymer blending: An original approach to structure PA12/PDMS blends at multiscales

Li, J.P.; Cassagnau, Philippe; Cruz-Boisson, Fernande Da; Mélis, Flavien; Alcouffe, Pierre; Bounor‐Legaré, Véronique

doi:10.1016/j.polymer.2017.01.039

Cited by 13 publications

(12 citation statements)

References 33 publications

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“…The PBT/PMHS blend showed slight improvement in hydrophobicity compared with pure PBT. More recently, the Ru 3 (CO) 12 catalyzed reactive blending was extended from polyester to polyamide which was never been reported . Through model study, it confirmed the possibility and efficiency of ruthenium catalyzed amide hydrosilylation reaction, concentration of N‐silylated compounds can reach 70 mol % after 2 h reaction at 100 °C.…”

Section: Introductionmentioning

confidence: 62%

“…In our previous work, the reactive compatibilization of PA12/PDMS‐SiH has been successfully proved in molten conditions under shear . The formation of N‐silylated polyamide and polyamine at the interface, as illustrated in the Figure , allowed to increase the interfacial adhesion between the two immiscible polymers, and finally promoted the dispersion of PDMS‐SiH into the PA12 matrix.…”

Section: Resultsmentioning

confidence: 93%

“…Then the torque decreased and finally compatibilized stable blend with a decrease in the PDMS‐SiH domain size (around 0.8 μm) and narrow domain size distribution of PDMS‐SiH in PA12 matrix is obtained. In addition, during the process, a second PDMS gel based dispersion with a diameter of approximately 20–30 nm is also formed due to self‐oxidation as shown in Figure (d).…”

Section: Resultsmentioning

confidence: 99%

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Specific properties of in situ ruthenium‐catalyzed polyamide 12/polydimethylsiloxane compatibilized blend

Cassagnau

Espuche

et al. 2018

J Polym Sci B Polym Phys

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The main objective of this work focused on the chemical modification of polyamide 12 (PA12) properties through the reaction with a hydride-terminated polydimethylsiloxane (PDMS-SiH). The investigated PA12/PDMS-SiH blend was compatibilized by ruthenium derivative catalyzed hydrosilylation reaction in molten state. This original route enhanced interfacial adhesion and avoid PDMS-SiH leaching phenomenon between the two immiscible phases. More specifically, the size of PDMS-SiH domains in the blend decreased from around 4 lm to 800 nm and from 30 to 1 lm after compatibilization with 10 and 20 wt % PDMS-SiH, respectively. For the best compatibilized PA12/PDMS-SiH blend, the introduction of PDMS lowered the surface free energy and the PA12-based blend turned from hydrophilic to hydrophobic behavior, as evidenced by the water contact angle measurements. Gas permeability and CO 2 /H 2 and CO 2 /He gas selectivity were also improved with the increase in PDMS content. Besides, the mechanical properties were enhanced with 13% increase in Young's modulus after in situ compatibilization with 15 wt % PDMS-SiH. Thermal stability was also improved after compatibilization as the initial degradation temperature of reactive blends obviously increased compared with nonreactive ones. V C 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2018, 56, 978-988

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Section: Introductionmentioning

confidence: 62%

Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

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Specific properties of in situ ruthenium‐catalyzed polyamide 12/polydimethylsiloxane compatibilized blend

Cassagnau

Espuche

et al. 2018

J Polym Sci B Polym Phys

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“…Different soft segments in polyamide block copolymers exhibit different properties such as the following: poly(ε‐caprolactone) is biodegradable and biocompatible; polydimethylsiloxane has good weathering resistance, low surface tension, and good biocompatibility; and PEG is well known for its hydrophilicity, nontoxicity, and biocompatibility . Therefore, it is interesting and significant to tune the chemical and physical properties of polyamide‐based block copolymers through variation in soft segments structure and molecular weight.…”

Section: Introductionmentioning

confidence: 99%

“…The obtained poly(ester amide)s exhibited obvious crystalline hard segments and with the increasing of PA6 hard segments content from 10 to 85 mol% the high melt transition increased from 83°C to 140°C. José E. Báez 19 synthesized 27 poly(ester-urethane-amide)s from the reaction of poly(ε-caprolactone) diols, 1,6-hexamethylene diisocyanate, and 3 different diamide-diol chain extenders derived from ε-caprolactone Different soft segments in polyamide block copolymers exhibit different properties such as the following: poly(ε-caprolactone) is biodegradable and biocompatible 18 ; polydimethylsiloxane has good weathering resistance, low surface tension, and good biocompatibility 23 ; and PEG is well known for its hydrophilicity, nontoxicity, and biocompatibility. 24 Therefore, it is interesting and significant to tune the chemical and physical properties of polyamide-based block copolymers through variation in soft segments structure and molecular weight.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of a new class of poly(ether‐block‐amide)s via solvent free reactive processing

Yang

Kong

Cai

2017

Polymers for Advanced Techs

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Novel poly(ether-co-amide) block copolymers (PEA) with polyamide-6 as hard segments and different polyether (polyoxytetramethylene glycol [PTMG]/polyethylene glycol [PEG]) as soft segments were prepared via reactive processing. The chemical structure, crystalline properties, mechanical properties, water resistance, and thermal stability of as-prepared PEAs were extensively studied by Fourier transform infrared spectroscopy, X-ray diffraction, differential scanning calorimetry, dynamic mechanical analysis, tensile testing, water contact angle, water absorption, and thermal gravity analysis. Fourier transform infrared spectroscopy confirmed the chemical structure and composition of PEAs. The X-ray diffraction and differential scanning calorimetry showed that PEAs consist of obvious crystalline polyamide-6 hard segments and that the crystalline structure of PEG will be significantly changed with the addition of PTMG. Dynamic mechanical analysis and tensile testing showed that the obtained PEAs exhibit classical elastomeric rubber plateau and tensile behavior. Meanwhile, the introduction of PTMG will improve the mechanical properties of PEAs. PEA with PEG as soft segments exhibited extremely surface hydrophilicity and high water absorption of 127%; the increasing of PTMG content in soft segments will reduce the surface hydrophilicity and improve the water resistance. In addition, the obtained PEAs exhibited good thermal stability, which will meet requirement of multiple processing. 1-4 Polyamide-based block copolymers usually consist of polyamide as hard segments and polyether or polyester as soft segment. [5][6][7][8][9][10] According to the practical application, polyamide-6 (PA6), polyamide-12, polyamide-66, polyamide-610, and other polyamides can be selected as the hard segments in the polyamidebased block copolymer. 4,11,12 Compared with other hard segments in the block copolymer, polyamide hard segments possess stronger hydrogen bonding and intermolecular forces, which will impart the block copolymer high melting temperature (T m ), organic solvent resistance, thermal resistance, abrasive resistance, etc. 13-15The oligomeric prepolymers with low glass transition temperature (T g ) were frequently used as the soft segments in the polyamide-based block copolymer in the previous study. ; and PEG is well known for its hydrophilicity, nontoxicity, and biocompatibility.24 Therefore, it is interesting and significant to tune the chemical and physical properties of polyamide-based block copolymers through variation in soft segments structure and molecular weight.In this study, the poly(ether-co-amide) block copolymers (PEAs) with PA6 as hard segments and polyether diol as soft segments are prepared through reactive processing without any solvent. Polyethylene glycol is selected as soft segments to enhance the hydrophilicity of PEAs, and the PTMG is introduced into the soft segments to improve the water resistance and mechanical properties of PEAs. The as-prepared PEAs are studied by Fourier transform infrared spectro...

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Facile fabrication of stain‐resistant poly(lactic acid)/silicone powder fibers: Comprehensive structure characterization and performance evaluation

Sun,

Zheng,

Guan

et al. 2024

J of Applied Polymer Sci

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Due to their eco‐friendly and functional attributes, the development of stain‐resistant poly(lactic acid) (PLA) fibers offers a multitude of benefits, including enhanced sustainability, ease of maintenance and expanded application fields. To investigate the feasibility of facile fabrication of stain‐resistant poly(lactic acid) (PLA) fibers, hydrophobic PLA fibers were produced using a scalable melt spinning technique employing silicone powder as the hydrophobic functional material. The influence of silicone powder content on the morphology and crystal structure of PLA fibers was investigated using different length scale characterization methods, including scanning electron microscopy and wide‐angle X‐ray diffraction. The relationships between the mechanical performance, hydrophobicity, and structure of the PLA fibers were established. The results showed that the synergistic effect of the micro/nanoconvex structure on the fiber surface created by silicon dioxide (SiO2) in silicone powder and the low surface energy of polydimethylsiloxane (PDMS) can considerably improve the hydrophobic functionality of the fibers. Compared with that of PLA fibers, the contact angle of hydrophobic PLA fibers increases from 67.3° to 87.6° with the addition of 3 wt% silicone powder. Furthermore, although silicone powder may accelerate PLA crystallization nucleation, it does not increase the crystallite size. When the silicone powder content is increased to 4 wt%, the mesophase fraction of the hydrophobic PLA fibers increases from 9.3% to 13.7%. This is the primary structural factor that allows the fiber to maintain its good tenacity. The tenacity of these hydrophobic PLA fibers is approximately 4.5 cN/dtex, which has excellent practical value.

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Efficient hydrosilylation reaction in polymer blending: An original approach to structure PA12/PDMS blends at multiscales

Cited by 13 publications

References 33 publications

Specific properties of in situ ruthenium‐catalyzed polyamide 12/polydimethylsiloxane compatibilized blend

Specific properties of in situ ruthenium‐catalyzed polyamide 12/polydimethylsiloxane compatibilized blend

Preparation and characterization of a new class of poly(ether‐block‐amide)s via solvent free reactive processing

Facile fabrication of stain‐resistant poly(lactic acid)/silicone powder fibers: Comprehensive structure characterization and performance evaluation

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