- 作者： 馬振基
- 作者服務機構： 國立清華大學化學工程研究所
- 中文摘要：
本文旨在研究Polyetherimide（PEI），Polyethersulfon（PES），Polysulfone（PSF）, Polyphenylene Sulfide（PPS）及Poly-
etheretherketone（PEEK）等五種高性能熱可塑型樹脂及其複合材料的流變性質、熱性質及形態學之特性。在高溫空氣中
加工時，黏度通常有隨時間增加的現象，而Storage modulus（G'）=Loss modulus（G"）的交叉點則隨溫度的增加而往前
移；PPS及PEEK有極佳之熱穩定性，加入碳纖維強化後，其熱穩定性更高；PEEK和PPS在高溫氮氣中加工時，黏度
隨時間無多大變化。而PEEK樹脂及其複合材料之熱安定性又比PPS者高出70℃至100℃，本文亦討論不同加工週期
及不同環境（氧氣或氮氣中）對熱性質及流變性質之影響。
本論文亦探討利用FT-IR及固態－NMR研究PPS熱老化後之形態學性質及流變性質。對於純PPS樹脂，由NMR
之MAS及CP可測得二個共振波?，但經熱處理或老化之PPS樹脂增加了四個波?，顯示PPS在熱處理過程中，其苯環
可能遭受含硫或Aryl ether之分子基（團）等攻擊。在熱處理或老化時最重要之兩種反應為分子增長（Chain-extension）
及交聯反應（Crooslinking），在氧氣中以交聯為主要反應，在氮氣中則以鏈增長為主。由FT-IR及動態黏彈性測得分子
量增加之情形，亦可證實此結論。r - 英文摘要： The rheological, thermal and morphological properties of high performance engineering thermo-plastic resins are presented in this paper. Resins studied include Polyetberimide (PEI), Polyether Sulfone(PES), Poly sulfone (PSI), Polyphenylcne Sulfide (PPS) and Polyetheretherketone (PEEK). Change ofdynamic viscosity, storage modulus and loss modulus with time at various temperatures were investigated.The addition of carbon fiber and the effects of environment on thermal stability are also presented. Cross-linking of Polyphenylene Sulfide in air, which enhances thermal stability, is discussed. PEEK resin and itscomposite, which show higher thermal stability than PPS by 70℃ to 100℃, are also described. Effects ofprocessing cycles and environment on thermal and theological properties are discussed. This paner also reviews the morphological properties of thermal-aged Polyphenylene Sulfide (PPS)resin by Fourier Transform Infrared spcctroscopy (FT-IR) and solid-state -NMR. Also included is amethod of applying the dynamic melt viscoelastic properties to determine the molecular weight distributionof the PPS resin. For virgin PPS resin, two resonance peaks were detected by NMR Magic Angle Spinning(MAS) and Cross Polarization (CP) studies. However, four additional peaks can be seen for heat-treatedPPS resin, indicating that the aromatic ring in PPS resin is attacked by sulfur-containing species or by thearyl ether group. The two most important reactions are crosslinking and chain-extension. However,chain-extension is predominant when PPS is heated in nigrogen. The results coincide with the phenomenonobserved in FT-IR. The molecular weight distribution of thermal-aged PPS resin was determined fromdynamic melt viscoelasticity data. Results show that the longer the preheated time the broader the nlole-cular weight distribution. This indicates that crosslinking and chain-extension reaction may occur whenPPS resin is heated in air.
- 中文關鍵字： Polyphenylene Sulfide; Polyethererherketone; Polyethermide; Polyether Sulfone; Polysulfone; thermal properties; rheology; morphology; composits
- 英文關鍵字： --
