表面改性处理对涤纶织物/聚氯乙烯复合材料界面性能的影响

为制备含磷无卤阻燃聚丙烯腈纤维，利用KOH 水溶液对丙烯腈（AH） 醋酸乙烯酯（VAc）无规共聚物（P（AN?co?VAc））纤维中的VAc单元进行选择性水解，再与O，O?二乙基磷酰氯进行磷酰化反应制得阻燃聚丙烯腈纤维。采用傅里叶变换红外光谱、差示扫描量热和热重分析法对阻燃纤维结构及热性能进行表征，利用扫描电子显微镜对阻燃聚丙烯腈纤维的炭残渣进行分析。结果表明：随水溶液pH值的升高，聚丙烯腈纤维中VAc单元迅速水解；聚丙烯腈纤维中VAc单元的存在使共聚纤维环化放热分解峰值温度增大，当VAc单元的质量分数为30%时，可达287℃，而阻燃聚丙烯腈纤维的该温度高达340℃；阻燃聚丙烯腈纤维在800℃ 时的炭残渣量高达48%以上，远高于共聚合聚丙烯腈纤维４１％的残炭量，具有良好的成炭性。

Influence of surface modification on interfacial properties of polyester fabric/polyvinyl chloride composites

In order to improve interfacial adhesive property and prolong service life of polyester fabric/polyvinyl chloride composites, the polyester fibers were subjected to surface modification with homemade fiber surface modifier by deoiling treatment, alkali treatment and modifier coating. The polyester fabric/polyvinyl chloride composites were prepared by using the treated polyester fabrics as reinforcer and polyvinyl chloride as matrix. The surface morphology, surface energy and monofilament strength of polyester fibers before and after modification as well as the mechanical properties interfacial peeling properties of polyester fabric/ polyvinyl chloride composites were tested by scanning electron microscope, atomic force microscope, dynamic contact angle tester and tensile tester, respectively. The results show that the roughness of the modified polyester fibers is obviously improved, the surface energy increases by 79. 77% compared with untreated polyester fibers, resulting in a 94. 82% increase in the interfacial peeling strength of polyester fabric/ polyvinyl chloride composites.