五种level的structure
atomic structure
short- and long-range atomic arrangement
nanostructure
microstructure
macrostructure
datasheet不给的数据
6.02*10^23 atoms/mol
s2 p6 d10 f14
简写时周期小的放前面
fraction of covalent bonding
f_covalent = e(-0.25\deltaE2)
f_ionic = 1 - f_covalent
thermoplastics的结构特征
The primary bond in thermoplastics are the covalent bonds that hold the individual carbon atoms together along the polymer chains while van der Waals secondary bonds hold the polymer chains close together.
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