本研究比較純同排聚苯乙烯(neat iPS)，不同比例雙成分摻合物(sPS/iPS=85/15 ， 70/30 ， 50/50 以及30/70) 與三成分混摻物(sPS/iPS/aPS=30/50/20)樣品之結晶行為，實驗上以SALS以及POM量測晶體半徑隨時間變化得到晶體成長速率並觀察成長過程。將結晶完全的樣
品，以SALS拍攝Hv及Vv影像判斷球晶尺寸大小以及球晶內部晶體排列；並以POM搭配phase contrast鏡頭觀察球晶尺寸大小和相分離結構domain 寬度及間距。利用FTIR判斷樣品內部sPS的晶型，與sPS、iPS各別結晶度。

利用TEM觀察sPS/iPS/aPS=30/50/20系統在250oC一階段，175oC一階段以及250/175oC兩階段熔融結晶微結構，發現iPS與aPS存在於sPS lamellar stack之間的domain，為interfibrillar結構，而iPS結晶完後，亦會將aPS排至iPS與iPS或是iPS與sPS的lamellar stack之間。利用WAXD判斷sPS/iPS/aPS=30/50/20系統在250oC一階段以及250/175oC兩階段熔融結晶之晶型，結果顯示sPS晶型皆為β型；但在175oC一階段結晶，sPS的晶型
為兼具α 與β型的混合晶型。

Crystallization behaviors of neat isotactic polystyrene(neat iPS)，binary blends with different ratios(sPS/iPS=85/15，70/30，50/50 and 30/70) and a tertiary blend(sPS/iPS/aPS= 30/50/20) were compared in this study. SALS and
POM were used and observe the growth process to measure the variations of spherulitic radius with time to obtain the crystal growth rate. Hv and Vv images of SALS were used to determine the size of spherulites and the lamellae arrangement within spherulites cold-crystallized at various
temperatures. On the other hand, POM with phase contrast lens were used to measure the domain widths and distances between phase-separated developed the domains in these crystallized samples. FTIR were used to judge the crystal
form of sPS and determine individual crystallinity of sPS and iPS in the samples.

From TEM images observation of the sPS/iPS/aPS=30/50/20 blend melt-crystallized at one-step 250oC，one-step 175oC and two-step 250/175oC processes, the iPS and aPS components existed in the domains between sPS lamellar stacks, giving an interfibrillar segregation morphology. After iPS crystallization, the aPS component was further excluded to the domains
between iPS lamellar stacks or iPS and sPS lamellar stacks. Based on WAXD diffraction patterns, sPS crystals of the tertiary blend melt-crystallized at one-step 250oC and two-step 250/175oC were β form, but mixed α/β form
sPS crystals were obtained after one-step 175oC melt crystallization.

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