• 作者： Hsieh, Kuo-Huang; Wu, Ming-Li
• 中文摘要： 本文以不同種類的多元醇和甲基二乙醇胺合成離子性聚胺基甲酸酯(PUI) 及以不同含量之丙烯酸合成聚苯乙烯丙烯酸(PSA) 為研究離子性摻合體之機械性質和相容性。由動態黏彈性質分析結果顯示此種不同比例之 PUI/PSA 摻合體之儲存模數(storage modulus)---溫 度的轉移,在PSA 含丙烯酸超過15莫耳%,則呈現一典型的相容摻合體的變化,而其損失模數( loss modulus)---溫度 曲線在PSA 之比例高的摻合體則呈現兩個轉移; 一個在高溫且較大的轉移代表PUI/PSA 摻合體的轉移,另一個在低溫且較小的轉移則屬於PUI。然而,當丙烯酸在PSA 的含量增至30莫耳%,兩個轉移皆向較低的溫度移動,此時較大的轉移仍代表PUI/PSA摻合體,但是PUI 的含量增加,較小的轉移則是由較多軟鏈節的PUI組成,此乃因含荷電體的硬鏈節與PSA中的丙烯酸相互作用而被吸出 PUI的軟/硬鏈節混合的結構。荷電體的引入摻合高分子中,確能提高此摻合體的抗張強度。本研究發現PUI/PSA的組成在20/80 比例和PSA 中含丙烯酸為30莫耳% 時,摻合體的抗張強度呈現一極大值。
• 英文摘要： Polyurethane ionomers (PUI) based on various types of polyols and extended with N-methyl diethanolamine and poly( styrene-acrylic acid) (PSA) with various acrylic acid (AA) contents were synthesized for the studies on the ionomeric blends. The dynamic mechanical analysis of the PUI/PSA blends revealed that the shift of storage modulus-temperature curves for various PUI/PSA ratios acted as a typical compatible polyblends for the charge group AA content over 15 mole% inPSA, whereas the loss modulus-temperature curves exhibited two transitional peaks at high PSA content: One major peak of the two transitional peaks at high temperature was the transition for PUI/PSA blends and the other minor peak at low temperature was that for PUI itself. However, as the AA content was increased up to 30 mole% in PSA, the two separated peaks which both shifted to low temperatures were varied in composition; the major peak was still for the transition of PUI/PSA blends but more PUI included, and the minor peak became a soft-segment enriched PUI domain due to that most of the dispersed hard-segments, which containing charge group tertiary amine, were attracted out of the soft/ hard-segment mixed phases of PUI by interacting with the opposite charge group,i.e., carboxyl group, in PSA. The tensile strength was greatly enhanced through the introduction of the charge groups into the blends. An important discovery for this study was that a maximum value in tensile strength as well as a corresponding maximum value in density was found at the composition of PUI/PSA ratio at 20/80 and PSA containing 30 mole% AA.
• 中文關鍵字： 離子性摻合物; 聚苯乙烯; 離聚物; 聚胺基甲酸酯; 荷電體; 機械性質; 相容性
• 英文關鍵字： Ionomeric Blends; Polystyrene; Ionomer; Polyurethane; Charge Groups; Mechanical Properties; Compatibility