什么是"晶點"?
晶點(dian)(dian)實際上(shang)是"過度(du)聚(ju)(ju)(ju)(ju)合(he)(he)物(wu)(wu)".即晶點(dian)(dian)部位(wei)聚(ju)(ju)(ju)(ju)合(he)(he)物(wu)(wu)的分(fen)子(zi)(zi)量,高(gao)于周圍(wei)同種聚(ju)(ju)(ju)(ju)合(he)(he)物(wu)(wu)的分(fen)子(zi)(zi)量,由(you)于分(fen)子(zi)(zi)量高(gao),因此(ci)晶點(dian)(dian)部位(wei)聚(ju)(ju)(ju)(ju)合(he)(he)物(wu)(wu)具有較高(gao)熔(rong)(rong)點(dian)(dian),在熔(rong)(rong)化時,熔(rong)(rong)體(ti)具有較高(gao)的粘度(du),晶點(dian)(dian)部位(wei)聚(ju)(ju)(ju)(ju)合(he)(he)物(wu)(wu)在吹(chui)(chui)成薄膜時,不能(neng)與周圍(wei)的同種聚(ju)(ju)(ju)(ju)合(he)(he)物(wu)(wu)相互(hu)均勻地分(fen)散/混和,并在熔(rong)(rong)體(ti)吹(chui)(chui)成薄膜后,先于周圍(wei)的同種聚(ju)(ju)(ju)(ju)合(he)(he)物(wu)(wu)凝(ning)固.因此(ci),研(yan)成"箭頭(tou)"狀或球狀過度(du)聚(ju)(ju)(ju)(ju)合(he)(he)物(wu)(wu)的凝(ning)固體(ti).習慣上(shang)被稱為"晶點(dian)(dian)"。
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