經多次熔融加工耐隆6/黏土插層型奈米複合材料之型態與力學性質

Morphology and Mechanical Properties of Reprocessed Polyamide 6/Clay Intercalated Nanocomposites

林佳弘(J. H. Lin) ； 蘇冠樺(K. H. Su) ； 吳宗明(T. M. Wu) ； 朱美珍(M. J. Chu) ； 林志清(C. C. Lin) ； 樓靜文(C. W. Lou)

《紡織綜合研究期刊》 19卷2期 (2009/04) Pp. 20-29

https://doi.org/10.6439/TTRJ.200904.0020

摘要

本研究以雙螺桿押出機對耐隆6與有機改質黏土進行熔融混練，製備耐隆6/黏土插層型奈米複材，再將所製得之複材置入相同的押出機中反覆加工五次，以模擬並評估多次熔融加工對插層型奈米複材型態與力學性質之影響。同時會以相同製程條件對純耐隆6進行多次加工，作爲實驗對照組。由X光繞射與穿透式電子顯微鏡分析得知，複材的黏土矽酸鹽層在耐隆6基材中之分散性隨著加工次數增加而由插層分散逐漸演進爲剝層分散。由拉伸試驗與缺口Izod衝擊試驗得知，隨著加工次數增加，複材的拉伸強度與模數皆會因黏土分散型態改善而隨之增加，耐隆6基材與其複材之斷裂伸度與缺口Izod衝擊強度則皆因耐隆6本身之裂解而逐次下降。

關鍵字

奈米複合材料 ； 熔融混練 ； 再加工

並列摘要

Polyamide 6 (PA6) and organoclay were melt compounded using a twin screw extruder to prepare the PA6/clay intercalated nanocomposites. Then, the nanocomposites were reintroduced again for further extrusion until the sixth cycle of processing was completed in order to simulate and evaluate the effect of multiple extrusions on the morphology and mechanical properties of PA6/clay nanocomposites. Neat PA6 was also reprocessed as a reference material. A combination of X-ray diffraction (XRD) and transmission electron microscopy (TEM) indicated that the dispersion and delamination of the clay particles were improved progressively with the increasing number of processing cycles from intercalation to exfoliation. Tensile modulus and yield stress were also found to increase slightly with increasing number of cycles due to better dispersion of the clay. However, elongation at break and notched Izod impact strength of both neat PA6 and PA6/clay nanocomposites were decreased with increasing number of cycles due to PA6 degradation during reprocessing.

並列關鍵字

Nanocomposites ； melt compound ； reprocess