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In your first sentence: The primer and coating poorly react to...The primer and coating poorly react to... This use suggests that you are expecting a reaction, but your result is poor. Which means there is a reaction, but just barely. An example would be if the coating was supposed to be non reflective-reflective and ends up reflecting light. In that case, it poorly reacted to the test condition.

In your second sentence: The primer and coating react poorly to...The primer and coating react poorly to... This suggests that while testing, there was a condition that damaged the primer and/or coating. An example of that would be a weak acid that partially dissolved the coating. In that case, the coating reacted poorly to the acid by dissolving partly.

Standard use would be the second phrasing.

I hope this helps to clarify.

In your first sentence: The primer and coating poorly react to... This use suggests that you are expecting a reaction, but your result is poor. Which means there is a reaction, but just barely. An example would be if the coating was supposed to be non reflective and ends up reflecting light. In that case it poorly reacted to the test condition.

In your second sentence: The primer and coating react poorly to... This suggests that while testing, there was a condition that damaged the primer and/or coating. An example of that would be a weak acid that partially dissolved the coating. In that case the coating reacted poorly to the acid by dissolving partly.

Standard use would be the second phrasing.

I hope this helps to clarify.

In your first sentence: The primer and coating poorly react to... This use suggests that you are expecting a reaction, but your result is poor. Which means there is a reaction, but just barely. An example would be if the coating was supposed to be non-reflective and ends up reflecting light. In that case, it poorly reacted to the test condition.

In your second sentence: The primer and coating react poorly to... This suggests that while testing, there was a condition that damaged the primer and/or coating. An example of that would be a weak acid that partially dissolved the coating. In that case, the coating reacted poorly to the acid by dissolving partly.

Standard use would be the second phrasing.

1
source | link

In your first sentence: The primer and coating poorly react to... This use suggests that you are expecting a reaction, but your result is poor. Which means there is a reaction, but just barely. An example would be if the coating was supposed to be non reflective and ends up reflecting light. In that case it poorly reacted to the test condition.

In your second sentence: The primer and coating react poorly to... This suggests that while testing, there was a condition that damaged the primer and/or coating. An example of that would be a weak acid that partially dissolved the coating. In that case the coating reacted poorly to the acid by dissolving partly.

Standard use would be the second phrasing.

I hope this helps to clarify.