摘要
用３种聚酯（ＰＥＡ、ＰＢＡ、ＰＨＡ）和ＭＤＩ合成了分子量和软硬段比例大致相同的３种聚氨酯胶粘剂（ＰＥＡＵ、ＰＢＡＵ、ＰＨＡＵ），以ＤＳＣ、ＤＭＡ和相差显微镜等手段研究了它们与ＰＶＣ的相容性。结果表明，ＰＢＡＵ、ＰＨＡＵ与ＰＶＣ均有良好的相容性，而ＰＥＡＵ则与ＰＶＣ不相容。３种胶粘剂对ＰＶＣ的粘接强度差异很大，其粘接强度次序为；ＰＨＡＵ～ＰＢＡＵ＞＞ＰＥＡＵ，由此提出了聚氨酯胶粘剂对ＰＶＣ的粘接机理。
Three series of polyurethane adhesives (PEAU ,PBAU,PHAU) with the same MW and hard/soft segment ratio,based on three polyesters(PEA,PBA,PHA),4,4'-diphnylmethane diisocyanate(MDI) and butendiol were synthesized.The compatibility of blends of PU with PVC was studied by means of DSC, DMA and phase contrast microscopy.The results indicated that, PBAU/PVC,PHAU/PVC were compatible systems,but PEAU/PVC was incompatible. the adhesive strength of the three adhesives was quite different from each other,with the order of PBAU≥PHAU>>PEAU. The influence of compatibility on adhesion was discussed,and the diffusion theory for PU-PVC system was recommended.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1994年第2期62-66,共5页
Polymer Materials Science & Engineering
关键词
聚氨酯
胶粘剂
相容性
粘接
s: polyurethane
adhesive
compatability
adhesion mechanism.
