摘要
研究了聚芳醚酮系列在１，２－二氯乙烷中的吸附，及溶剂与温度诱导结晶行为。得到６０℃时的最大吸附量Ｃ∞及假扩散系数Ｄ为：ＰＥＥＫ，Ｃ∞＝４６％，Ｄ＝３．１０×１０－１２ｍ２·ｓ－１；ＰＥＥＫＫ，Ｃ∞＝５０％，Ｄ＝６．５７×１０－１２ｍ２·ｓ－１；ＰＥＫＫ，Ｃ∞＝５５％，Ｄ＝９．４１×１０－１２ｍ２·ｓ－１。实验表明，吸附及脱附行为均与分子链刚性或羰基含量有关，膜的分子链受溶剂作用而极化，直接导致其变色。脱附后残留溶剂及诱导无定型膜结晶。极化与诱导结晶则使膜的玻璃化温度相对提高１０～１４℃，并使晶型变化。
The absorption and crystallization behavior of poly(aryl ether ketone)s (PAEKs) by annealing and in solvent of C_2H_4Cl_2 have been investigated and compared. The maximum equillibrium absorption (C∞) and Pseudo-Fichian coefficient (D) at 60℃ for PAEKs were obtained as: C=46%, D=3.10×10-12m2·s-1 for PEEK, C=50%, D=6.57×10-12m2·s-1 for PEEKK, and C=55%, D=9.41×10-12m2·s-1 for PEKK. The absorption behavior of PAEKs is related to their molecular rigidity and ketone content in the chemical repeat unit. And, it is suggested that this absorption mechanism is the interaction between solvent and film resin, which initiates the molecular polarization, and in turn, causes amorphous films to change color, change and form residual solvents there. Solvent-crystallization and polarization have enhanced the glassy transition temperature up to 10 -14 ℃ relative to that thermally annealing state, and changed the film morphology, too.
出处
《功能高分子学报》
CAS
CSCD
1998年第1期49-54,共6页
Journal of Functional Polymers
基金
国家"863"重大项目
中科院高分子物理联合开放国家重点实验室基金
关键词
吸附
诱导结晶
聚芳醚酮膜
PEEK膜
Poly(aryl ether ketone)s (PAEKs), Absorption, Molecular rigidity and polarization, Glass transition temperature
