摘要
聚丙烯酸丁酯(PnBA)/蓖麻油聚氨酯(COPU)半SEN(Semi-Simultaneous Elastomer Net-work)中,PnBA为线形分子,两组分间只能形成“蛇笼式”的互穿和缠结.这种缠结在外力作用下易脱开,组分间相容性虽较简单混合有所改善,但不甚显著,在某些组分比之下,力学性能也较差.全SEN中两组分均为交联结构,会产生一部分环套式的永久性缠结.只要不发生化学键断裂,这种网间缠结便不能脱开,它将对全SEN的形态、性能及组分间相容性产生较大的影响.
Poly(N-butyl acrylate)/polyurethane based on castor oil (PnBA/COPU) full-SEN has been synthesized by simultaneous prepolymerization and the tensile, swelling and transition behavior, and morphology of full-SEN were characterized. The effect of composition on tensile strength, Young's modulus and elongation at break of full-SEN is similar to that of semi-SEN, but the values are higher than those of semi-SEN's as the weight fraction of PnBA is higher than 0. 5. The micrographs of full-SEN show a two-phase morphology and the compatibility of the two components in full-SEN is much higher than semi-SEN.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1992年第3期418-420,共3页
Chemical Journal of Chinese Universities
关键词
聚丙烯酸丁酯
蓖麻油聚氨酯
全SEN
Poly(n-butyl acrylate) , Polyurethane based on castor oil, Full-SEN, Tensile property, Morphology
