• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Rheological properties of ionically crosslinked poly(propylene)-type thermoplastic elastomers
【24h】

Rheological properties of ionically crosslinked poly(propylene)-type thermoplastic elastomers

机译：离子交联聚（丙烯）型热塑性弹性体的流变性能

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Maleic anhydride was grafted onto poly(propylene) (PP)-type thermoplastic elastomer PER by reactive processing with a screw extruder and a maleated PER (MPER) was prepared. With the intent of ionic crosslinking, metal compounds such as aluminum stearate (AlSt), magnesium stearate (MgSt), calcium stearate (CaSt), zinc stearate (ZnSt), potassium stearate (KSt), sodium stearate (NaSt), magnesium hydroxide (MH), zinc oxide (ZnO), and zinc sulfide (ZnS) were added to the MPER and melt-mixed with the screw extruder, and crosslinked compounds were obtained. The degree of crosslinking estimated from the gel fraction was in the order AlSt, MgSt, CaSt, Znst > NaSt, KSt > MH > ZnO, ZnS > MPER. The rheological properties, such as capillary flow properties and dynamic viscoelasticities, of the compounds were measured and their melt processabilities were evaluated. The viscosity increased with increasing the content of the metal compounds and the increase was higher at the lower shear rate. The increasing effect of the viscosity at low shear rates was AlSt > Mgst > ZnSt > NaSt > KSt > MH > ZnO > ZnS > MPER. Namely, the viscosity increasing effect of the metal salt of stearic acid is the higher for the larger ionic charge and the viscosity increasing effects of other compounds are lower than those of the metal salts of stearic acid. Accordingly, by changing the kind and content of the metal compounds, the viscosity can be freely controlled. Considering also other rheological characteristics, these ionically crosslinked compounds are assumed to show ideal flow processabilities except for the extrudate appearance. To improve the appearance, it is necessary to dilute the compound with unmodified PER, PP, or fillers. (C) 2002 Wiley Periodicals, Inc. [References: 61]
机译：通过用螺杆挤出机进行反应性处理，将马来酸酐接枝到聚丙烯（PP）型热塑性弹性体PER上，从而制备了马来酸化的PER（MPER）。出于离子交联的目的，金属化合物如硬脂酸铝（AlSt），硬脂酸镁（MgSt），硬脂酸钙（CaSt），硬脂酸锌（ZnSt），硬脂酸钾（KSt），硬脂酸钠（NaSt），氢氧化镁（ MH），氧化锌（ZnO）和硫化锌（ZnS）添加到MPER中，并与螺杆挤出机熔融混合，得到交联的化合物。由凝胶分数估计的交联度为AlSt，MgSt，CaSt，Znst> NaSt，KSt> MH> ZnO，ZnS> MPER的顺序。测量化合物的流变性质，例如毛细管流动性质和动态粘弹性，并评估其熔融加工性。粘度随着金属化合物含量的增加而增加，并且在较低的剪切速率下增加幅度更大。在低剪切速率下，粘度的增加作用为AlSt> Mgst> ZnSt> NaSt> KSt> MH> ZnO> ZnS> MPER。即，对于较大的离子电荷，硬脂酸金属盐的增粘效果较高，而其他化合物的增粘效果低于硬脂酸金属盐的增粘效果。因此，通过改变金属化合物的种类和含量，可以自由地控制粘度。还考虑其他流变性，这些离子交联的化合物被认为具有理想的流动加工性能，除了挤出物的外观。为了改善外观，必须用未改性的PER，PP或填料稀释该化合物。 （C）2002 Wiley Periodicals，Inc. [参考：61]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号