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首页> 外文期刊>Journal of Applied Polymer Science >Properties of aliphatic polyesters with n-paraffinic side branches
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Properties of aliphatic polyesters with n-paraffinic side branches

机译：具有正链烷烃侧链的脂族聚酯的性能

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Effect of ethyl and n-octyl branches on the properties of poly(ethylene adipate) (PEA) and poly(butylene succinate) (PBS) were investigated. Glass transition and melting temperature, crystallinity, melt viscosity, and spherulite growth rate were decreased with an increase in the degree of the chain branches. Introduction of ethyl branches as well as n-octyl branches into PEA did not improve the tensile strength and modulus, while it reduced elongation and tear strength significantly. The presence of glycerol units less than 0.05 mol/mol of diacid units in PEA as well as in PSB also brought about damaging effects on the properties. Additional amount of glycerol units in the polyesters resulted in the formation of gel. However, addition of n-octyl branches improved elongation and tear strength of PBS considerably without a notable decrease of tensile strength and modulus. (C) 2000 John Wiley & Sons, Inc. [References: 21]
机译：研究了乙基和正辛基支链对聚己二酸乙二醇酯（PEA）和聚丁二酸丁二酯（PBS）性能的影响。玻璃化转变温度和熔融温度，结晶度，熔融粘度和球晶生长速率随着链支化程度的增加而降低。将乙基支链和正辛基支链引入PEA并没有改善抗张强度和模量，但显着降低了伸长率和撕裂强度。在PEA和PSB中，甘油单元的二元酸单元的含量小于0.05 mol / mol，也会对性能造成破坏性影响。聚酯中甘油单元的额外量导致形成凝胶。但是，添加正辛基支链可显着改善PBS的伸长率和撕裂强度，而拉伸强度和模量不会明显降低。 （C）2000 John Wiley＆Sons，Inc. [参考：21]

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