Properties of polypropylene and polypropylene/poly(ethylene-co-vinyl alcohol) blend/CNC nanocomposites

Bagheriasl, Davood; Carreau, Pierre J.; Dubois, Charles; Riedl, Bernard

doi:10.1016/j.compscitech.2015.07.012

Cited by 66 publications

(57 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Neat CMC film exhibited featureless and smooth fracture surface (Figure 7a), which was well associated with its poor mechanical properties. It was reported that due to the hydrophilic characteristics of CNCs and the poor interfacial adhesion between CNCs and hydrophobic polymer, the CNCs aggregated and were present in the form of micro-sized flakes in hydrophobic polymer matrix [41][42][43][44].…”

Section: Mechanical Properties Of Mcnc/cmc Filmsmentioning

confidence: 99%

Cationic surface modification of cellulose nanocrystals: Toward tailoring dispersion and interface in carboxymethyl cellulose films

Mei

et al. 2016

Polymer

View full text Add to dashboard Cite

The present work describes the development of high performance cellulose nanocrystals/carboxymethyl cellulose (CNC/CMC) films through a rational design of CNC surface chemistry. Considering the anionic surface nature of CMC, surface cationization of CNCs was performed in order to build strong interfacial bonding by electrostatic attraction and form uniform dispersion state by electrostatic repulsion. Nanocomposite films were fabricated by dispersing the CNCs and cationically modified CNCs (mCNCs) in CMC matrix through solution casting. The resultant CNC/CMC and mCNC/CMC films were then evaluated in terms of processability, mechanical properties and fracture surface morphology. Results showed that the reinforcing capacity of mCNCs was greatly dependent on its substitution degree. High substitution degree was favorable for obtaining mCNC/CMC film with unifrom dispersion and superior mechanical properties. The observed distinctive reinforcing phenomena from CNCs and mCNCs in CMC matrix were interpreted in terms of dispersion state and interfacial bonding based on the fracture surface morphology.

show abstract

Section: Mechanical Properties Of Mcnc/cmc Filmsmentioning

confidence: 99%

Cationic surface modification of cellulose nanocrystals: Toward tailoring dispersion and interface in carboxymethyl cellulose films

Mei

et al. 2016

Polymer

View full text Add to dashboard Cite

show abstract

“…This typical phenomenon of molten polymers suggests that the addition of MOSp or MOSs does not alter the intrinsic quality of PP matrix. 36 However, MOSw-reinforced composites show weakening “plateau region,” especially for the PP/15PP- g -MAH/15MOSw composite, whose “plateau region” completely disappears at low frequencies. This apparent yield stress can be attributed to the particle–particle contact effect of MOSw, and the specific quantify of apparent yield stress ( σ y ) can be determined by applying the modified four-parameter Cross model 24 to the experimental data…”

Section: Resultsmentioning

confidence: 99%

“…These phenomena imply that adding MOSw significantly improves the elasticity of PP matrix but also hinders the migration of PP molecular chains. 24,36 That is to say PP matrix converts from “liquid-like” behavior to “solid-like” behavior, probably due to the formation of MOSw network.…”

Section: Resultsmentioning

confidence: 99%

Effect of magnesium oxysulfate (MOS) morphology on the crystallization, mechanical, and rheological properties of polypropylene/MOS composites

Dang

Nai

Liu

et al. 2018

Journal of Thermoplastic Composite Materials

View full text Add to dashboard Cite

Polypropylene (PP) composites containing magnesium oxysulfate particle (MOSp), magnesium oxysulfate whisker (MOSw), or magnesium oxysulfate sector (MOSs) were prepared via melt blending method. Scanning electron microscopy results showed that three magnesium oxysulfate (MOS) fillers all dispersed homogeneously in PP matrix and displayed vague and fuzzy interfaces. Wide-angle X-ray diffraction (WXRD) patterns showed that MOSp induced the most amount of β-PP, which was supported by polarized light microscopy (PLM) photographs. Moreover, PLM photographs also showed that the presence of MOSp, MOSw, or MOSw decreased the PP spherulites, especially for MOSp. As such, mechanical tests showed that incorporation of MOSp into PP matrix greatly improved the impact strength and least lowered the nominal strain at break. The yield strength and Young’s modulus of composites were greatly enhanced with MOSw. Two possible reasons for this phenomenon are rigidity of MOSw and microstructure of composites. Rheological properties were measured via small amplitude oscillatory shear. The results showed that PP melts containing MOSw exhibited significant yield stress and “shear-thinning” behaviors, which indicated the formation of MOSw network and the transition from “liquid-like” PP matrix to “solid-like” composites. The rheological results greatly proved the enhancement in tensile properties of MOSw-incorporated composites.

show abstract

“…The polar nature of CNC creates compatibility problems, making it challenging to incorporate CNC particles into non-polar polymers using melt compounding operations, and leading to poor dispersion and sub-optimal properties [10][11][12]. To counteract this problem, several methods to incorporate CNC in thermoplastics have been proposed, including combinations of solution and melt compounding techniques [13,14], water-assisted compounding [15], use of compatibilizers [16] and in situ polymerization, followed by melt compounding or solution casting [17]. Several modification methods have been developed in recent years to address the incompatibility between CNC and the polymer matrices.…”

Section: Introductionmentioning

confidence: 99%

Crystalline nanocellulose/thermoplastic polyester composites prepared by in situ polymerization

Clarke

Vasileiou

Kontopoulou

2019

Polymer Engineering & Sci

View full text Add to dashboard Cite

In situ polymerization by polycondensation was implemented to disperse crystalline nanocellulose (CNC) in poly(ethylene succinate) (PESu). The in situ polymerization technique resulted in good dispersion of the CNC nanoparticles in the PESu matrix. The polymerization kinetics were altered with increasing CNC content, causing a decrease in the polymer molecular weight. The addition of CNC particles having a large aspect ratio resulted in significant increases in the viscosity of the resulting composites, and significantly enhanced crystallization kinetics. PESu containing well‐dispersed 0.25 wt% CNC maintained the tensile properties of the matrix, demonstrating that at these very low loadings the CNC acts as an efficient nucleating agent, without compromising the mechanical properties and biodegradability POLYM. ENG. SCI., 59:989–995, 2019. © 2019 Society of Plastics Engineers

show abstract

Properties of polypropylene and polypropylene/poly(ethylene-co-vinyl alcohol) blend/CNC nanocomposites

Cited by 66 publications

References 39 publications

Cationic surface modification of cellulose nanocrystals: Toward tailoring dispersion and interface in carboxymethyl cellulose films

Cationic surface modification of cellulose nanocrystals: Toward tailoring dispersion and interface in carboxymethyl cellulose films

Effect of magnesium oxysulfate (MOS) morphology on the crystallization, mechanical, and rheological properties of polypropylene/MOS composites

Crystalline nanocellulose/thermoplastic polyester composites prepared by in situ polymerization

Contact Info

Product

Resources

About