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Reviewer: 1 Comments to the Author General Comments o Lack of novelty. RSM in this manuscript can be considered as new thing. o Solvothermal … It has been reported by previous researchers (Rongrong et al…2005 in Polymer Journal) oEnglish must be improved? Introduction • Lack of information. It should be added more information to relate with the current study. • Page 1,Line 8 to 9, ….“ However, traditional methods could not obtain graft polymer with high percentage of grafting”…. o Question: In manuscript, author (s) did not report, even in abstract and conclusion section, the percentage of grafting produced from your method compared to the traditional method. o Question: What do you mean by traditional method? To make it clear, author(s) should elaborate or discuss more on this statement. • Page 2, line 1 to 3,…”In this study, the solvothermal method was first successfully used to prepare the…. o Question: What do you mean by ‘first’…is it never used before?.. Actually this method has been reported thoroughly by Rongrong Qi et al (2005) in Polymer Journal. • Page 2, line 3, .. “Then grafting mechanism was described….” o Question : Author (s) was not described this mechanism in detail in the manuscript (just a few line)…so what do you mean by “ describe”….. Methodology • Lack of explanation. It is hard to understand the method used in this study. o MAH concentration, styrene concentration, reaction time, reaction temperature, etc did not report in this manuscript? • Page 2, Grafting copolymerization, Line 2,.. different reaction conditions o Question : ... In what conditions ? • Page 2, Grafting copolymerization, Line 2 to 3, ….appropriate amount ? o Question : ... How much ? • Page 2, Grafting copolymerization, Line 2 to 3, temperature oven for a certain time ? o Question : ... Value ? Discussion • Lack of discussion, particularly the mechanism shown in Scheme 1. • Absorption values (FTIR) and characteristics peaks (NMR) in text were not correspond to the value shown in Figures 1 and 2. Reference o Reference format writing was totally wrong ….. Reviewer: 2 Comments to the Author The manuscript deals with a grafting procedure of PP by parameters optimization. The introduction is not adequate; really the grafting of PP(by melt processing and/or by solution approaches) have been extensively investigated in the last decades but the authors reported only few references. The purpose/aim is not clearly assessed No fundamental experimental details for grafting are reported: temperature, time, amount of reagents; these parameters are probably discussed in the optimization description part, but not in a clear way and in any case a description of methodologies is necessary to facilitate the understanding of the reader. Products were not adequately purified and the characterization by FT-IR and NMR did not evidence the grafting reactions : the presence of double bonds and of the other signals can be easily associated to monomers trapped and not removed by the simple washing with acetone; any details about experiments able to justify the gradient of grafting (from the surface to the core of PP??? The author used pellets, films??) have been reported and discussed. Discussion did not support the experimental results The scheme of reactions mechanism is wrong (at least by considering the poor experimental details not able to justify the presence of water and the first reaction reported): in the presence of PP and peroxide (if the reaction conditions are adequate) the first reaction is the formation of a macroradical undergoing to grafting in the presence of MAH and/or a reaction with the charge transfer complex (CTC) that generally is formed by MAH and Sty (not mentioned by the autors). Degradation by b-scission is the most important side reaction for PP |
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