什(shen)么是"晶點"?
晶(jing)(jing)點(dian)實際上是"過度(du)聚(ju)合(he)物".即晶(jing)(jing)點(dian)部(bu)(bu)位聚(ju)合(he)物的分(fen)子(zi)量,高(gao)于(yu)(yu)周(zhou)圍(wei)同(tong)種(zhong)聚(ju)合(he)物的分(fen)子(zi)量,由于(yu)(yu)分(fen)子(zi)量高(gao),因(yin)此(ci)晶(jing)(jing)點(dian)部(bu)(bu)位聚(ju)合(he)物具有(you)較(jiao)高(gao)熔(rong)點(dian),在(zai)熔(rong)化時,熔(rong)體具有(you)較(jiao)高(gao)的粘度(du),晶(jing)(jing)點(dian)部(bu)(bu)位聚(ju)合(he)物在(zai)吹成薄膜時,不能與周(zhou)圍(wei)的同(tong)種(zhong)聚(ju)合(he)物相(xiang)互均勻地分(fen)散/混和,并在(zai)熔(rong)體吹成薄膜后,先于(yu)(yu)周(zhou)圍(wei)的同(tong)種(zhong)聚(ju)合(he)物凝固(gu).因(yin)此(ci),研(yan)成"箭頭"狀(zhuang)或球(qiu)狀(zhuang)過度(du)聚(ju)合(he)物的凝固(gu)體.習慣(guan)上被稱為"晶(jing)(jing)點(dian)"。
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