The influence of the surface character of the clays on the properties of poly(<i>p</i>‐dioxanone)/fibrous clay nanocomposites

Qiu, Zhi-Cheng; Zhang, Jing‐Jing; Huang, Caili; Niu, Yumei; Yang, Ke‐Ke; Wang, Yu‐Zhong

doi:10.1002/app.35040

Cited by 7 publications

(6 citation statements)

References 43 publications

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“…It is believed that CaCO 3 whiskers act as nucleating agents to induce earlier formation of PPDO nuclei and also improve the crystallinity of PPDO. This suggests that the inorganic particles exert a remarkable effect on the crystallinity of PPDO in the composites .…”

Section: Resultsmentioning

confidence: 92%

Effect of calcium carbonate whisker content on the morphology, crystallization, and mechanical properties of poly(para-dioxanone)/Calcium carbonate whisker composites

et al. 2015

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In this work, poly(para‐dioxanone) (PPDO) was mixed with 0, 1, 5, 10, 20, and 30 weight percent (wt%) calcium carbonate (CaCO3) whiskers by solution coprecipitation. Samples were compression molded into bars using a platen vulcanizing press. It has assessed the influence of the CaCO3 whisker content on the morphology, thermal, mechanical, and crystalline properties of the PPDO/CaCO3 whisker composites, using differential scanning calorimetry (DSC), polarized optical microscopy, scanning electron microscopy, and X‐ray diffraction. DSC showed that the glass transition temperature (Tg) and crystallization temperature (Tc) of the composites increased with increasing CaCO3 whisker content. At low CaCO3 whisker content (1 wt%), the degree of crystallinity (Dc) of PPDO increased sharply. The addition of higher content of CaCO3 whisker would cause more agglomeration in PPDO matrix, so that the mechanical properties of PPDO/CaCO3 whisker composites would gradually decrease. The mechanical properties of PPDO were changed by the presence of CaCO3 whiskers; the optimal amount of CaCO3 whisker was 1 wt%, which sharply improved the tensile strength of PPDO by 54%. POLYM. COMPOS., 37:3442–3448, 2016. © 2015 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 92%

Effect of calcium carbonate whisker content on the morphology, crystallization, and mechanical properties of poly(para-dioxanone)/Calcium carbonate whisker composites

et al. 2015

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“…Poly(p-dioxanone) (PPDO) has varieties of applications in the biomedical field and has been used as a repair material during surgery and in drug-delivery systems. [24][25][26] The presence of ether bonds in the backbone provides PPDO with unique properties, such as excellent flexibility and a fast hydrolysis rate compared with other aliphatic polyesters. 27 PPDO fiber is attracting considerable attention as the use of bioresorbable suture.…”

Section: Introductionmentioning

confidence: 99%

Iodinated poly(p-dioxanone) as a facile platform for X-ray imaging of resorbable implantable medical devices

Zhao

Xue

et al. 2020

J Biomater Appl

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Currently, implantable fibrous medical devices still suffer from invisibility under current clinical imaging techniques. To address this problem, 2, 3, 5-triiodobenzoic acid (TIBA) was recruited as a contrast agent, and then a set of iodinated poly( p-dioxanone) (PPDO) fibers was fabricated via melt-spinning hybrid blends of PPDO with TIBA (PPDO/TIBA). The impact of TIBA content on the rheological behavior of blends was evaluated firstly. The physical, chemical, and thermal properties of PPDO/TIBA fibers were investigated accordingly by SEM, FTIR, DSC, and TGA. Moreover, the radiopaque property of PPDO/TIBA hybrid fibers as a potential radio-opacifying platform for medical devices was verified in vitro and in vivo. Finally, the accumulated release results of the hybrid fibers during in vitro degradation indicate the continual X-ray visibility of the hybrid fibers maintains for 22 days. This intriguing iodinated platform may pave the way for constructing fibrous materials with in-situ X-ray tracking property.

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“…Consequently, it is inappropriate for clinical uses that require strong, flexible and biodegradable polymeric materials, such as a coronary artery stent, artificial skin and veins. As a result, various approaches have been undertaken in order to improve PLGA's properties and processing a b i l i t i e s , i n c l u d i n g p o l y m e r blending 18,19 , copolymerization 20,21 and stereocomplexation 22 .…”

Section: Introductionmentioning

confidence: 99%

Miscibility and Isothermal Crystallization Behavior of Poly-(L-Lactide-Co-Glycolide)/ Poly(ρ-Dioxanone) Blends

Zhang

Bai

et al. 2014

Polymers and Polymer Composites

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We prepared a series of blends from solution co-precipitation of poly-(L-lactide-co-glycolide) (PLGA) and poly (ρ-dioxanone) (PPDO) at various mass ratios. Using a scanning electron microscopy (SEM), PLGA and PPDO were revealed to be immiscible. The crystallization behavior of PLGA/PPDO blends was investigated by differential scanning calorimetry (DSC) under isothermal conditions. Through comparing the crystallization exothermic peak location and the PLGA/PPDO blends' shape, the crystallization rate was determined to slow as the temperature increased. We applied the Avrami equation to analyze the primary stage of the isothermal crystallization and obtained relevant crystallization kinetic parameters. The data revealed that the PPDO component acted as nucleation sites in blends and accelerated the PLGA crystallization rate by increasing the crystallization rate constant k and decreasing the half-crystallization time (t1/2). The Arrhenius equation was used to analyze the crystallization's activation energy. Our analysis confirmed that blending with PPDO accelerates PLGA crystallization. Our micrograph imaging of the spherulites via a polarizing optical microscopy (POM) revealed that the PLGA/PPDO blends' crystals were smaller in size but greater in number than that of pure PLGA. This finding indicated that PPDO is a good nucleation agent for PLGA. All these results suggest that it is possible to control the PLGA crystallization rate by adding a PPDO component.

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The influence of the surface character of the clays on the properties of poly(p‐dioxanone)/fibrous clay nanocomposites

Cited by 7 publications

References 43 publications

Effect of calcium carbonate whisker content on the morphology, crystallization, and mechanical properties of poly(para-dioxanone)/Calcium carbonate whisker composites

Effect of calcium carbonate whisker content on the morphology, crystallization, and mechanical properties of poly(para-dioxanone)/Calcium carbonate whisker composites

Iodinated poly(p-dioxanone) as a facile platform for X-ray imaging of resorbable implantable medical devices

Miscibility and Isothermal Crystallization Behavior of Poly-(L-Lactide-Co-Glycolide)/ Poly(ρ-Dioxanone) Blends

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