That means PMMA has changed from polar polymer to non-polar polymer.
That means PMMA has changed from polar polymer to non-polar polymer.
对此现象的解释机理提出了“孔洞”与“极性基团断裂”两种假设。
That means PMMA has changed from polar polymer to non-polar polymer.
对此现象的解释机理提出了“孔洞”与“极性基团断裂”两种假设。