On the Application of Vickers Micro Hardness Testing to Isotactic Polypropylene.

Polymers (Basel) · 2022 · PMC9102282 · PMID 35566972

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an increasing trendno p-value reported

Both data sets (the current data and the data from the literature) show an increasing trend in hardness with CB addition (even over the range of 3 wt.% of the current data), but the current hardness data are approximately double the values cited in the literature.

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