Crystallization, melting, supermolecular structure and properties of isotactic polypropylene nucleated with dicyclohexyl-terephthalamide

被引：43

作者：

Horvath, Flora ^{[1
]}

Gombar, Tibor ^{[1
]}

Varga, Jozsef ^{[1
]}

Menyhard, Alfred ^{[1
,2
]}

机构：

[1] Budapest Univ Technol & Econ, Lab Plast & Rubber Technol, Dept Phys Chem & Mat Sci, Muegyet Rkp 3 H Ep 1, H-1111 Budapest, Hungary

[2] Hungarian Acad Sci, Inst Mat Sci & Environm Chem, Res Ctr Nat Sci, Magyar Tudosok Korutja 2, H-1117 Budapest, Hungary

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2017年 / 128卷 / 02期

关键词：

beta-nucleating agents; Calorimetry; Dicyclohexyl-terephthalamide (DCHT); Isotactic polypropylene; Polarized light microscopy (PLM); Supermolecular structure; NONISOTHERMAL CRYSTALLIZATION; ISOTHERMAL CRYSTALLIZATION; POLYMORPHIC COMPOSITION; INJECTION MOLDINGS; BETA-MODIFICATION; BEHAVIOR; ALPHA; SOLUBILITY; CRYSTALS; AGENTS;

D O I：

10.1007/s10973-016-6057-7

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Dicyclohexyl-terephthalamide (DCHT) is an efficient and partially soluble nucleating agent for isotactic polypropylene. Its properties, nucleating efficiency and selectivity were characterized using infrared spectroscopy, calorimetry and polarized light microscopy techniques with special attention to the dissolution and recrystallization of DCHT in the iPP melt. The mechanical properties of the nucleated samples were studied using standard tensile tests. It was found that DCHT possesses dual (alpha and beta) nucleating ability. DCHT is soluble in polypropylene melt and recrystallized from the melt during the cooling. It was observed that a special supermolecular structure is formed in its presence, where micron-sized alpha-iPP is dispersed finely in the beta-iPP matrix. This unique structure promoted good stiffness and toughness simultaneously.

引用

页码：925 / 935

页数：11

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