功地合成了带烷端基的酚酞聚芳醚腈 ,测定其 1H- NMR谱 ,根据链中芳环质子共振峰与链端基质子共振峰积分强度比求解分子量 ,与聚合物特性粘度关联 ,确定了酚酞聚芳醚腈在四氢呋喃溶剂中 ,6 0℃的 Mark- Houwink常数 K=1.6 4× 10 -6,α=0 .918,建立了其在四氢呋喃溶剂中的特性粘度与数均分子量的关系 :[η]=1.6 4× 10 -6M0 .918 The molecular weight of phenolphthalein poly (arylene ether ether) with alkyl end groups was synthesized successfully and its1H-NMR spectrum was measured. The molecular weight was solved by integral intensity ratio of aromatic ring proton resonance to chain protonation proton in the chain, The results showed that the Mark-Houwink constant K = 1.6 4 × 10 -6 and α = 0.1818 at 60 ℃ were determined in tetrahydrofuran solvent. The intrinsic viscosity and number average molecular weight Relationship: [η] = 1.6 4 × 10 -6 M0 .918