The phrase "a mixture of polypropylene" is correct and usable in written English.
It can be used when describing a composition or blend that includes polypropylene as one of its components.
Example: "The product is made from a mixture of polypropylene and other materials to enhance its durability."
Alternatives: "a blend of polypropylene" or "a combination of polypropylene".
A mixture of polypropylene and aramid fibers was used in this study to evaluate the performance characteristics of a modified asphalt mixture.
Foaming was controlled by continuous addition of a mixture of polypropylene glycol (PPG) of different molecular weights PPG 1025 (BDH): PPG 2025 (BDH): FoamMaster PPG (mixed molecular weight; Henkel Performance Chemicals, Leeds, UK) in the ratio 2 2 1 [ 15] to give a final concentration of approximately 0.01% (v/v) PPG.
Foaming was controlled by continuous addition of a mixture of polypropylene glycol (PPG) of different molecular weights PPG 1025 (BDH): PPG 2025 (BDH): FoamMaster PPG (mixed molecular weight; Henkel Performance Chemicals, Leeds, UK) in the ratio 2 2 1 (35) to give a final concentration of approximately 0.01% (v/v) PPG.
TPU used in this study was a segmented urethane having a 1 1 mixture of polypropylene glycol (PPG) and polytetramethylene glycol (PTMG) as the soft segment and 4,4′-diphenyl methane diisocyanate (MDI) extended with ethylene diamine (EDA) as the hard segment.
In order to reduce the brittleness of soil stabilized by lime only, a recent study of a newly proposed mixture of polypropylene fibre and lime for ground improvement is described and reported in the paper.
For these experiments the masterbatch consisted of a mixture of organoclay and maleated polypropylene.
To investigate and understand the influence of the mixture of polypropylene fibre and lime on the engineering properties of a clayey soil, nine groups of treated soil specimens were prepared and tested at three different percentages of fibre content (i.e. 0.05%, 0.15%, 0.25% by weight of the parent soil) and three different percentages of lime (i.e. 2%, 5%, 8% by weight of the parent soil).
Investigations of the structure of polypropylene fibres coloured with a mixture of quinacridone and phthalocyanine pigments were carried out.
After the silicate sol cooled down to 25 °C, the silicate sol was added to a mixture of pluronic polymer, ethanol, and different amounts of polypropylene glycol (PPG, labeled as % wt of L121).
Sol/Gel behavior of a mixture of two Pluronic species with non-identical polypropylene oxide (PPO) and polyethylene oxide (PEO) block lengths in aqueous medium is explored.
The heating of a mixture of ethyl 2- 1,1-dimethylethylperoxymethyl propenoate and atactic polypropylene allowed the grafting of ester and epoxide functions onto the polyolefin.
