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采用一步法,以端羟基液体聚丁二烯(HTPB)、N,N-二(2-羟基丙基)苯胺(HPA)和甲苯二异氰酸酯(TDI)为原料,按HPA/HTPB=2(mol比)的条件,制备了各种聚丁二烯聚氨酯弹性体。研究了弹性体的力学性能和HTPB的(?)n、弹性体中氨基甲酸酯基团浓度c的关系。弹性体的拉仲强度T_B、100％模量σ、永久变形S和硬度H均随HTPB的(?)n的增加而降低,并呈如下关系:T_B(或σ、S、H)=A/(?)n+B。式中A和B均为常数。当力学性能为T_B或σ时,B=0。T_B、σ,S和H均随c的增加而增加,并存在如下关系:T-B~(-1)(或σ~(-1)、S~(-1)、H~(-1))=K/c+L。式中K和L是和A、B有关的常数。
A one-step method was used to synthesize HTPB with HPA / HTPB = 2 (mol) by using HTPB, HPA and TDI as raw materials, Ratio) conditions, prepared a variety of polybutadiene polyurethane elastomer. The relationship between the mechanical properties of elastomers and the (?) N of HTPB and the concentration of carbamate groups c in elastomers was investigated. The tensile strength T B, 100% modulus σ, permanent set S and hardness H of the elastomer decrease with the increase of (?) N of HTPB, and have the following relation: T_B (or σ, S, H) = A / (?) n + B. Where A and B are constant. B = 0 when the mechanical properties are T_B or σ. T_B, σ, S and H both increase with the increase of c, and the following relations exist: TB -1 (or σ -1, S -1, H -1) = K / c + L. Where K and L are A and B related constants.