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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and Characterization of Copolyesters Containing the Phosphorus Linking Pendent Groups
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Synthesis and Characterization of Copolyesters Containing the Phosphorus Linking Pendent Groups

机译：含磷侧链基团的共聚酯的合成与表征

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Poly (ethylene terephthalate)-co-poly (ethylene DDP)s [PEF-co-poly (ethylene DDP)s], were synthesized by charging 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOP), itaconic acid, terephthalic acid, and ethylene glycol in one reactor to conduct the microaddition reaction (using H_2PtCl_6 as catalyst), esterification reaction, and polycondensation reacion. H_2PtCl_6 has demonstrated to be a highly efficient microaddition catalyst to improve the DDP conversion. The microaddition reaction of the phosphorus compound (DOP) with the itaconic acid can be proceeded at a significantly lower temperature (110 deg C) and results in higher conversion (>98%). The use of the H_2PtCl_6 catalyst makes it possible to charge all the reactants in one reactor to produce high molecular weight phosphorus-containing copolyesters without requiring the presynthesis of the DDP. These resulting copolyesters are identified by Fourier transform infrared spectroscopy, ~1H-NMR, and differential scanning calorimetric analysis. Thermal characteristics, thermal stability, intrinsic viscosity, acid value, and rheological and mechanical properties of these copolysters were also characterized. The presence of the bulky pendent phosphorus side groups in the copolyester tends to decrease the structural regularity and retards its crystallization. The formation of a protected char layer for the phosphorus-containing copolyester raises the decomposition temperature of the copolyester under an oxygen atmosphere higher than that of PET. The limiting oxygen index values of all phosphours-containing copolyesters are all higher than 33. Higher phosphorus content results in decreasing crystallinity, lower melting temperature, lower decomposition temperature, as well as lower tensile strength, but increasing residual char after thermal degradation and higher limiting oxygen index value. The rheoogical behaviors of copolyesters remain similar to that of PET. The glass temperatures of copolyesters are all approx 77 deg C (76.8 deg -77.2 deg C). Incorporation of phosphorus moieties into its molecular chain has a significant effect on thermal and flame retardancy behavior. However, the crystal lattice of all copolyesters do not change with incorporation of the pendent phosphorus side group in the backbone of the copolyester.
机译：聚对苯二甲酸乙二酯-共-聚（乙烯DDP）[PEF-共-聚（乙烯DDP）]是通过将9,10-二氢-9-氧杂-10-磷杂菲-10-氧化物（DOP）装料合成的），衣康酸，对苯二甲酸和乙二醇在一个反应​​器中进行微加成反应（使用H_2PtCl_6作为催化剂），酯化反应和缩聚反应。已证明H_2PtCl_6是提高DDP转化率的高效微加成催化剂。磷化合物（DOP）与衣康酸的微加成反应可以在明显较低的温度（110℃）下进行，并导致较高的转化率（> 98％）。 H_2PtCl_6催化剂的使用使得可以在一个反应​​器中装入所有反应物，以生产高分子量的含磷共聚酯，而无需预先合成DDP。通过傅立叶变换红外光谱，〜1H-NMR和差示扫描量热分析法鉴定这些所得的共聚酯。还表征了这些共聚多酯的热特性，热稳定性，特性粘度，酸值以及流变和机械性能。共聚酯中大量的侧基磷侧基的存在趋于降低结构规则性并阻碍其结晶。含磷共聚酯的保护炭层的形成使氧气氛下的共聚酯的分解温度高于PET。所有含磷的共聚酯的极限氧指数值都高于33。较高的磷含量会导致结晶度降低，较低的熔融温度，较低的分解温度以及较低的拉伸强度，但会增加热降解后的残留炭量和较高的极限氧指数值。共聚酯的流变行为保持与PET相似。共聚酯的玻璃温度均为约77℃（76.8℃-77.2℃）。将磷部分结合到其分子链中对热和阻燃行为具有重要影响。但是，所有共聚酯的晶格都不会随着侧基中侧基磷侧基的引入而改变。

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