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Research data supporting "The evolution of the structure and mechanical properties of fully bioresorbable polymer-glass composites during degradation"


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Type

Dataset

Change log

Authors

Zhang, Xiang C 

Description

Thermal data measured by DSC for composites of PLLA and PLLA:PLCL(70:30)-with P45Ca45 and P40Ca50 phosphate glass, before degradation (Fig01). Contains Microsoft Excel file with Tg measurements and experimental details. Script and data files for generating plots are also given (.txt). Representative stress-strain curves (Fig02) from tensile tests of composites in ambient conditions (t0dry) and immersed in 37°C water (t0wet), all before degradation. Contains .txt files with example stress-strain curves, as well as script and data files for generating plots (.txt). Also contains Microsoft Excel file with measured mechanical properties, and key to identifying stress-strain curves (.xlsx). Calculation of mechanical properties of composites in ambient conditions (t0dry) and immersed in 37°C water (t0wet), all before degradation (Fig03). Fig03_modulus.xlsx contains calculation of predicted modulus from Counto model, and analysis of the goodness-of-fit. Voigt-Reuss bounds are also calculated for plotting in Fig 3. Fig03_yieldstrength.xlsx contains calculation of the predicted lower bound yield strength, as well as conversion of glass weight fractions to volume fractions used for plotting. Script and data files for generating plots are also given (.txt). Measurements from long-term degradation tests of composites in 37°C phosphate-buffered saline. Contains Microsoft Excel file (Fig04_data.xlsx) with raw pH, Ca²⁺ electrode potential, and wet mass measurements, along with calculation of Ca²⁺ concentration and wet mass %, along with appropriate averages and standard deviations. Example Ca²⁺ ISE calibration curve is also shown. Script and data files for generating plots are also given (.txt). Measurements of composite sample mass before and after 5, 30, and 120 days degradation in 37°C phosphate-buffered saline. Microsoft Excel file (Fig05_composite_mass.xlsx) with wet mass, dry mass, and ash content measurements, as well as calculations of water, glass, and polymer mass percentages. Fig05_data_export.xlsx contains data from the previous file, rearranged for plotting over time. Script and data files for generating plots are also given (.txt). X-ray diffraction data for polymer crystallisation within composites (Fig06.xlsx). Raw XRD patterns (.uxd) given for examples of samples undergoing no polymer crystallisation, and extensive polymer crystallisation. Polymer crystallinity percentage measured by XRD is also given, normalised to the proportion of polymer present in the composite. Script and data files for generating plots are also given (.txt). DSC data showing enthalpy relaxation (Fig07) occurring during degradation is given in a Microsoft Excel file. Example raw DSC curves before and after degradation are supplied, as well as the change in enthalpy relaxation after 5, 30, and 120 days degradation. Script and data files for generating plots are also given (.txt). Raw SEM images of selected compositions before and after 120 days degradation (Fig08) are given (.tif), along with example XRD pattern showing the inorganic phases present within composite materials after degradation (.uxd). Script and data files for generating plots are also given (.txt), as well as illustration file (.svg) and figure (.png). Mechanical properties (modulus, yield strength, elongation at break) measured in 37°C water before and after 5, 30, and 120 days degradation in 37°C phosphate-buffered saline (Fig09). Microsoft Excel file (.xlsx) given with data for each timepoint, as well as script and data files for generating plots are also given (.txt). Raw ashing data (Tab01) showing sample masses for as-fabricated composites. Experimental details, measurements (slide mass before and after ashing), and ash calculations given in Microsoft Excel file (.xlsx). Plots are generated using gnuplot (www.gnuplot.info), Note: In raw data, deprecated glass codes are sometimes used. PG7 denotes glass code P45Ca45 (P₂O₅)₄₅(CaO)₄₅(Na₂O)₁₀, and PG11 denotes glass code P40Ca50 (P₂O₅)₄₀(CaO)₅₀(Na₂O)₁₀.

Version

Software / Usage instructions

Plots are generated using gnuplot (www.gnuplot.info), other instructions for use of data are contained within files.

Keywords

environmental degradation, glasses, mechanical properties, particle-reinforced composites, polymer-matrix composites

Publisher

Sponsorship
The authors thank Lucideon Ltd. for financial support of the project. RNO also thanks the Woolf Fisher Trust and the Cambridge Trust for provision of a PhD scholarship
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