[Retracted] Preparation and Sound Insulation Performance of Polystyrene Building Flame Retardant and Thermal Insulation Building Materials

Table 2

Specific surface area and contact angle of MH before and after modification.

Sample	Specific surface area/(m^2. g^−1)	Contact angle/(°)
MH	42.671 ± 0.312	0
MMH	52.134 ± 0.124	22.6