什(shen)么是"晶點(dian)"?
晶(jing)(jing)點(dian)(dian)實際上是"過(guo)度(du)聚(ju)合(he)(he)物(wu)".即晶(jing)(jing)點(dian)(dian)部位聚(ju)合(he)(he)物(wu)的分(fen)子量(liang),高(gao)于(yu)(yu)周(zhou)圍同(tong)(tong)種聚(ju)合(he)(he)物(wu)的分(fen)子量(liang),由于(yu)(yu)分(fen)子量(liang)高(gao),因此晶(jing)(jing)點(dian)(dian)部位聚(ju)合(he)(he)物(wu)具有較高(gao)熔(rong)點(dian)(dian),在(zai)熔(rong)化時(shi),熔(rong)體具有較高(gao)的粘度(du),晶(jing)(jing)點(dian)(dian)部位聚(ju)合(he)(he)物(wu)在(zai)吹(chui)成薄膜時(shi),不能與(yu)周(zhou)圍的同(tong)(tong)種聚(ju)合(he)(he)物(wu)相(xiang)互均勻地分(fen)散/混和,并在(zai)熔(rong)體吹(chui)成薄膜后(hou),先于(yu)(yu)周(zhou)圍的同(tong)(tong)種聚(ju)合(he)(he)物(wu)凝(ning)固(gu).因此,研成"箭頭(tou)"狀或球狀過(guo)度(du)聚(ju)合(he)(he)物(wu)的凝(ning)固(gu)體.習慣上被(bei)稱為"晶(jing)(jing)點(dian)(dian)"。
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