ポリスチレンの引張強度に及ぼす温度とその分子量の影響

概要

論文の詳細を見る
The tensile strength of polystyrene decreases with increasing temperature and with decreasing molecular weight,showing a S mark Curve with the change of temperature or molecular weight. As amorphous polymers such as polystyrene maintain their strength with the entangled bonds of molecular chains, the following experimental equation representing the relation between the temperature T and the tensile strength T_s has been introduced from the change of density of effective molecular chain with the temprerature based on the entangled bonding of molecular chains. T_s=S_b[1-3/((T_m-T_b)√<2>) ∫^T_<T_b> exp {-(9(T-T_m)^2)/(2(T_m-T_b)^2)}dT] when S_b is the tensile strength at the temperature of brittle fracture point, T_m is the maximum temperature of dispersion of the distribution of density of effective molecular chain and T_b is the temperature of brittle fracture point. The experimental data of polystyrenes of various molecular weights indicate a sufficient agreement with the experimental T_s curves.
社団法人日本材料学会の論文
1986-09-15