However,true miscibility is not a requirement in most instances and generally undesirable.Adhesion between the polymer phases is necessary,greater miscibility is favored for polymers containing polar groups (e.g.PVC/NBR).For non-polar polymers, miscibility occurs only when their solubility parameters are closely matched
However, true miscibility is not a requirement in most instances and generally undesirable. Adhesion between the polymer phases is necessary, greater miscibility is favored for polymers containing polar groups (e.g.PVC/NBR). For non-polar polymers, miscibility occurs only when their solubility parameters are closely matched
o composition of blends:for instance, 50/50 NR/BR implies total volume being 100,NR 50 and BR 50
⚫ composition of blends: for instance, 50/50 NR/BR implies total volume being 100 , NR 50 and BR 50
New words o Exercise and discussion 1.Expressions: basic conceptions: polymer blends; graft copolymerizations; block copolymerizations; IPN's; compatibility
New words ⚫ Exercise and discussion ⚫ 1.Expressions: basic conceptions: polymer blends; graft copolymerizations; block copolymerizations; IPN’s; compatibility
2.Answer the questions:when are two components compatible blends?
2. Answer the questions: when are two components compatible blends?
Chapter Compatibility and Morphology of Polymer Blends (聚合物共混物的相容性和形态结构) 1.Compatibility of rubber blends and polymer-polymer phase diagrams 图
Chapter 1 Compatibility and Morphology of Polymer Blends （聚合物共混物的相容性和形态结构） ⚫ 1. Compatibility of rubber blends and polymer-polymer phase diagrams (相 图)