什么(me)是"晶點"?
晶點(dian)(dian)(dian)實際上是"過度(du)聚(ju)(ju)合(he)(he)物(wu)".即晶點(dian)(dian)(dian)部(bu)位(wei)聚(ju)(ju)合(he)(he)物(wu)的(de)分子量，高于周圍(wei)(wei)同(tong)(tong)種聚(ju)(ju)合(he)(he)物(wu)的(de)分子量，由(you)于分子量高，因此(ci)晶點(dian)(dian)(dian)部(bu)位(wei)聚(ju)(ju)合(he)(he)物(wu)具有(you)較(jiao)高熔(rong)(rong)點(dian)(dian)(dian)，在(zai)熔(rong)(rong)化時，熔(rong)(rong)體具有(you)較(jiao)高的(de)粘度(du)，晶點(dian)(dian)(dian)部(bu)位(wei)聚(ju)(ju)合(he)(he)物(wu)在(zai)吹成薄(bo)(bo)膜(mo)時，不(bu)能與周圍(wei)(wei)的(de)同(tong)(tong)種聚(ju)(ju)合(he)(he)物(wu)相互均(jun)勻地分散/混和，并在(zai)熔(rong)(rong)體吹成薄(bo)(bo)膜(mo)后，先于周圍(wei)(wei)的(de)同(tong)(tong)種聚(ju)(ju)合(he)(he)物(wu)凝(ning)固.因此(ci)，研(yan)成"箭頭"狀或球狀過度(du)聚(ju)(ju)合(he)(he)物(wu)的(de)凝(ning)固體.習慣上被稱(cheng)為"晶點(dian)(dian)(dian)"。