Preparation and Properties of Novel Modified Waterborne Polyurethane Acrylate
Round 1
Reviewer 1 Report
Comments
1. The term "3C plastic coatings" in the abstract should either be clarified or deleted. The use of the term "3C plastic coatings" in the keywords will not improve the search efficiency for the potential readers of the article. Therefore the acronym "3C" should be removed from the keywords.
2. In Table 1 the unit of measure (%) of WPU-EA should be indicated. One decimal sign for EA should be given as in Table 2.
3. The phrase "in accordance with GB/T 528-2009" should be changed to "in accordance with GB/T 528-2009 standard" (P.5).
4. The phrase "in accordance with ASTM D3363" should be changed to "in accordance with ASTM D3363 standard" (P.5.).
5. The title of ISO 2409-1992 should be replaced by the following ISO 2409-2020 (P.5).
6. How was the film thickness of 50-55 µm measured? Specify the technique.
7. Names of the axes in the figures should be in the same size font.
8. Write (a) and (c) instead of the designation of figures a and b in Figure 3.
9. Table 2 should be after the mentioning in the text.
10. In Figure 5b the rate of polymerisation should be designated as (s-1)
11. In section 3.5, the values of stress and elongation should be approximated to one decimal mark or indicate the accuracy with which the stress and elongation have been determined.
12. Specify the dimensions of dumbbell-shaped specimens for tensile testing.
13. In Figure 7b and in the text use a single designation for the loss factor, e.g. tan δ.
14. In Figures 1 and 8, remove the legend of the curves.
15. Indicate the spacing of cuts when determining adhesion in accordance with ISO 2409-2020.
16. ISO 2409-2020 describes the test for measuring adhesion according to six-step classification and does not measure adhesion force as described in section 2.5.
17. The authors use the term "strength hardness" on page 2. This term should be explained.
18. Correct the misprints. Replace combing with combining (P.2).
Instead of 31.11g and 28.89g, write 31.11g and 28.89g.
Instead of equition (1), write equation (1) (P.2, P.5).
Instead of "First, the UV-cured film was cut into the size", write "First, the UV-cured film was cut into the size" (P.5).
Instead of "then acetone was added into the extractor" write "then acetone was added into the extractor" (P.5).
The word "consumed" should be written instead of "coosumed".
Instead of "tobetter", write "to better".
Instead of "toa lower", write "to a lower" (P.8).
Instead of "filmsexhibit", write "films exhibit" (P.8).
Author Response
Please see the attachment.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
The presented study is very good written, easy to understand.
I have several minor requirements that needs to be corrected.
The manuscript in not prepaired according to Journal template making the review process complicated (absence the lines). This should be corrected.
In the introduction part, the authors stated: "For the advantages of high curing rate, low curing temperature and outstanding environmental-friendly characteristics, waterborne polyurethane acrylates have been applied in many fields such as protective coatings, plastics and adhesives[10,11]". - my question is what about the printing inks (not additive manufucturing but conventional Uv curing inks)? And by what do you mean environmental friendly, are those materials biodegradable? please explore this section with the following aspects and consequently extend the refrence list.
page 4: not Scheme 1 but Figure 1. In addition, if the figure is not authors, than the refrence is missing.
section 2.4. "Finally, the film was irradiated under UV irradiation " - instead of irradiated, isn't it better to used "cured" or "dried" (later you are talking about the UV cured films).
page 5: regarding the FTIR spectroscopy. What about the baseline corrections if the peak area was used for the DC from Eq.4?
Section 3.2. - 1st paragrpah regarding the FTIR should be more extended. The refrences are missing (validation of vibrational bands). In the FTIR spectroscopy we are talking about vibrational band, the usage of terminology"peaks" is a bit more as sleng. What bands are assigned to PU and what to acrylates? The band at 810 (according to literature) is assigned to CH2=CH– deformation. Thus the stated claim is not true and should be corrected. What about the band a t 1408cm-1? have you detected it? Are there any other bands present? I see several. Please correct this part of the manuscript.
page 8: " The emulsion stability includes mechanical stability and thermal stability. The mechanical stability of the emulsion was judged by centrifuging at 3000 rpm for 30 min, while the thermal stability of the emulsion was evaluated by storing for 14 d at 60 °C to inspect the appearance of the bulk water phase. Table 2 shows the basic properties of emulsions with different epoxy
acrylate contents. The emulsions have good stability and the minimal storage periods are over 12 months except for WPU-EA-9." - i am missing this in the methodology and the basic procedure desribed.
page 12: why did water absorption decreased? We are missing some kind of explanation here! How was the water absorption measured? Missing in the experimental part.
Author Response
Please see the attachment
Author Response File: Author Response.pdf
Round 2
Reviewer 2 Report
Authors responded to all questions.
