Morphology and rheological properties of silica-filled poly(carbonate)/poly(methyl methacrylate) blends

Li, Weizhen Weizhen; Spoelstra, AB Anne; Goossens, Jgp Han

doi:10.1002/pen.24036

Cited by 16 publications

(15 citation statements)

References 30 publications

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“…Since OBC is more elastomeric, it has a higher storage modulus than PCL. The small shoulder in the low‐frequency regime of the storage modulus of 80/20 OBC/PCL indicates a droplet‐matrix structure, attributed to shape relaxation of the droplets driven by interfacial tension . This result is consistent with the SEM image of the 80/20 OBC/PCL blend, which shows the existence of the matrix‐droplet structure.…”

Section: Resultssupporting

confidence: 84%

A Simple Process for Making Supercontraction Fiber From Polycaprolactone/Elastomer Blends

Shi

Yao

2020

Polymer Engineering & Sci

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Supercontraction fiber with shrinkage ratio as high as eight times is processed from simple polymer blending and melt spinning. Specifically, polycaprolactone and ethylene‐octene block copolymer blends are made and then processed into fibers with a two‐step sequence of melt extrusion and room‐temperature drawing. The morphological properties, mechanical properties, rheological behavior, thermal properties, and shrinking ability of the blend fiber are characterized. The scanning electron microscope images of the blends indicate two types of structure: cocontinuous structure and matrix‐droplet structure. Fiber made from the cocontinuous blend has the supercontraction ability, while fiber from the matrix‐droplet blend does not. Additional hot drawing of the fiber at 50°C is found to be helpful for improving the mechanical properties, shrinking ratio, and shrinking stress. Cyclic tensile testing was also conducted and the results show that the supercontraction fiber may be used repeatedly for multiple times. POLYM. ENG. SCI., 60:793–801, 2020. © 2020 Society of Plastics Engineers

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Section: Resultssupporting

confidence: 84%

A Simple Process for Making Supercontraction Fiber From Polycaprolactone/Elastomer Blends

Shi

Yao

2020

Polymer Engineering & Sci

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“…It is obvious that the interpretations for the macroscopic properties of ternary “melt/soft solid/rigid solid” systems can be correlated to the morphological features by analyzing the Cole–Cole plots. These relationships are consistent with the previously reported results for thermoplastic blends .…”

Section: Resultsmentioning

confidence: 99%

Effects of liquid crystal polymer and organoclay addition on the physical properties of high‐density polyethylene films

Durmuş

Ercan

Alanalp

et al. 2019

Polymer Engineering & Sci

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In this study, physical properties of high‐density polyethylene (HDPE) films, blended and reinforced with small amounts of liquid crystal polymer (LCP) and organoclay (org‐clay), were investigated by employing different characterization tools such as X‐ray diffractometer, scanning electron microscope, differential scanning calorimetry, rotational rheometer, dynamic mechanical analysis, and gas permeability measurements. Viscoelastic properties of samples were quantified by applying several test procedures in melt and solid‐state dynamic measurements. It was found that rigid LCP droplets were dispersed well into HDPE matrix and improved the melt elasticity and creep resistance of HDPE. Compatibilizer and org‐clay loading into HDPE/LCP blends yielded formation of smaller LCP droplets and reduced mean relaxation time and shear modulus values, compared to unloaded counterparts. It was observed that org‐clay stacks were dispersed into HDPE phase due to using of maleic anhydride grafted polyethylene as compatibilizer and HDPE/LCP/org‐clay ternary nanocomposites exhibited intercalated microstructure. Solid‐state uniaxial tensile creep behaviors of films were modeled with the Findley power‐law and four‐element Burger models. HDPE/LCP/org‐clay (90/10/5) ternary nanocomposite film exhibited better gas barrier performance than HDPE by decreasing its permeability by 50%. POLYM. ENG. SCI., 59:1344–1353 2019. © 2019 Society of Plastics Engineers

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“…34 The appearance of a second circular arc or tail implies of a second phase with a second relaxation mechanism. 33 A Cole-Cole plot of peroxide-treated PLLA (LOL1) and its blends with linear PLLA is shown in Consequently, with the applied blend ratios in the present study and the large viscosity difference between the components, it is reasonable to expect that the peroxide-treated PLLA/linear PLLA blends would exist in a droplet/matrix phase morphology.…”

Section: Steady State and Oscillatory Rheologymentioning

confidence: 99%

Blends of linear and peroxide‐modified branched polylactide for extrusion coating

2017

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The purpose of the present work was to improve melt rheological properties of linear poly(L-lactide) (PLLA) by melt blending with peroxide-modified branched PLLA for extrusion coating. Peroxidemodified PLLA, ie, PLLA melt extruded with 0.3 wt% of tert-Butyl-peroxybenzoate (TBPB); 2,5-dimethyl-2,5-(tert-butylperoxy)-hexane (Lupersol 101 [LOL1]); and benzoyl peroxide was added to linear PLLA in ratios of 5, 15, and 30 wt%. All blends showed increased zero shear viscosity, elastic feature (storage modulus, decreased tan delta), and shear sensitivity. The blends' properties were mostly dependent on the peroxide applied for the modification and, to some extent, on the amount of added peroxide-modified PLLA. Rheological models suggest that all blend compositions are mainly immiscible. Thermal properties were unchanged; all materials remained amorphous, though the enthalpy of cold crystallization was slightly increased. Extrusion coating on paperboard was conducted with PLLA and peroxide-modified PLLA blends (90:10). All blends were processable; however, only that made with 2,5-dimethyl-2,5-(tert-butylperoxy)-hexane (LOL1) afforded a smooth high-quality coating surface with improved line speed. Adhesion levels between fibre and plastic and heat seal performance were marginally reduced compared with pure PLLA (3051D). The water vapour transmission measurements with 2,5-dimethyl-2,5-(tert-butylperoxy)-hexane (LOL1) showed acceptable water transmission levels, being only slightly higher than for neat PLLA coating. 1 Several studies on poly(L-lactide) (PLLA) solution-coated paperboard for food applications have shown enhanced performance. 2,3 However, the linear polymer chain structure of PLA causes processing issues when higher melt elasticity is required, such as in fibre production, 1 foaming, 4 and extrusion coating. 5 In an extrusion-coating process, the "neck-in" and "draw-down-speed" are critical parameters affecting the economics and potential line speeds during the process. 5 Substantial numbers of studies on various polymers, eg, polyethylene and polypropylene, have proven that neck-in is related to the elasticity, and draw-down ability is mostly dependent on the viscosity of the polymer.

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Morphology and rheological properties of silica-filled poly(carbonate)/poly(methyl methacrylate) blends

Cited by 16 publications

References 30 publications

A Simple Process for Making Supercontraction Fiber From Polycaprolactone/Elastomer Blends

A Simple Process for Making Supercontraction Fiber From Polycaprolactone/Elastomer Blends

Effects of liquid crystal polymer and organoclay addition on the physical properties of high‐density polyethylene films

Blends of linear and peroxide‐modified branched polylactide for extrusion coating

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