The present study firstly describes the synthesis of novel, thermo-latent initiators based on xanthenyl phosphonium salts with different counter anions and phosphine moieties and secondly examines their efficiency in the bulk polymerization of glycidyl phenyl ether (GPE). The polymerization was performed with phosphonium salt initiators (I _SbF6 ,I _PF6 ,I _AsF6 andI _BF4 ) at ambient temperature to 200 °C for 1 h. The order of initiator activity wasI _SbF6 >I _PF6 >I _AsF6 >I _BF4 . To examine the effect of the phosphine moiety on the initiator activity, polymerization was carried out withI _SbF6 (Ph₃P) andII _SbF6 (Bu₃P) at ambient temperature to 170 °C for 1 h. The order of reactivity wasI _SbF6 >II _SbF6 . In general, the conversion percentage increased with increasing polymerization temperature. The thermal stability of these salts was measured by thermo gravimetric analysis (TGA). The solubility of phosphonium salts in various organic solvents and epoxy monomers was also investigated.

中文翻译：

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新型黄嘌呤phospho盐对缩水甘油基苯基醚的热诱导阳离子聚合

本研究首先描述了基于具有不同抗衡阴离子和膦部分的黄嘌呤phospho盐的新型热潜在性引发剂的合成，其次研究了它们在缩水甘油基苯基醚（GPE）本体聚合中的效率。用_phospho盐引发剂（I _SbF6，I _PF6，I _AsF6和I _BF4）在室温至200°C下进行聚合1小时。引发剂活性的顺序为I _SbF6 > I _PF6 > I _AsF6 > I _BF4 。为了检查膦部分对引发剂活性的影响，在环境温度至170°C下，用I _SbF6（Ph ₃ P）和II _SbF6（Bu ₃ P）进行聚合1小时。反应顺序为I _SbF6 > II _SbF6。通常，转化率随着聚合温度的升高而增加。这些盐的热稳定性通过热重分析（TGA）测量。还研究了salts盐在各种有机溶剂和环氧单体中的溶解度。