Facile synthesis of polyamide 6 (PA6)-based thermoplastic elastomers with a well-defined microphase separation structure by melt polymerization†,Polymer Chemistry

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Facile synthesis of polyamide 6 (PA6)-based thermoplastic elastomers with a well-defined microphase separation structure by melt polymerization†
Polymer Chemistry ( IF 4.1 ) Pub Date : 2018-02-27 00:00:00 , DOI: 10.1039/c8py00068a
Ruchao Yuan _{1,

2,

3,

4,

5} , Shuo Fan _{1,

2,

3,

4,

5} , Dequn Wu _{1,

2,

3,

4,

5} , Xueli Wang _{4,

5,

6,

7} , Jianyong Yu _{4,

5,

6,

7} , Lijun Chen _{7,

8,

9,

10} , Faxue Li _{1,

2,

3,

4,

5}

Affiliation

A facile “2-step” melt polymerization method with high efficiency, easy accessibility, little pollution and low cost was proposed to fabricate thermoplastic elastomers (TPAEs) composed of polyamide 6 (PA6) and poly(tetramethylene glycol) (PTMG). To elucidate the thermal properties of these TPAEs measured by differential scanning calorimetry (DSC), a three-phase system was represented: a “pure” PA6 crystalline phase, a phase-separated mesophase (soft phase domains embedded in a PA6 ordered phase matrix) and a mixed phase (PA6 disordered phase + soft segments). The X-ray technology, dynamic mechanical analysis (DMA) and transmission electron microscopy (TEM) results offered further support to the morphological structural interpretation. The soft segment weight fraction in the mixed phase (W_SS) was found to be equal to the overall soft segment weight concentration (C_SS). The multiple melting transitions (T_M and T_MMT) occurring in these TPAEs were assigned to the disruption of the “pure” PA6 crystalline phase and the phase-separated mesophase, respectively. Additionally, the prepared TPAEs demonstrated better thermal and mechanical properties than PEBAX®, one of the commercial elastomers, presenting the potential to be widely used in various industrial fields.

中文翻译：

通过熔融聚合轻松合成具有明确的微相分离结构的聚酰胺6（PA6）基热塑性弹性体†

提出了一种简便，高效，易于操作，污染少，成本低的“两步法”熔融聚合方法，以制备由聚酰胺6（PA6）和聚四亚甲基二醇（PTMG）组成的热塑性弹性体（TPAE）。为了阐明通过差示扫描量热法（DSC）测量的这些TPAE的热性能，表示了一个三相系统：“纯” PA6结晶相，相分离的中间相（嵌入PA6有序相矩阵中的软相域）和混合相（PA6无序相+软链段）。X射线技术，动态力学分析（DMA）和透射电子显微镜（TEM）结果为形态结构解释提供了进一步的支持。混合相中的软链段重量分数（W _SS）被发现等于整体软链段重量浓度（C _SS）。在这些TPAE中发生的多个熔融转变（T _M和T _MMT）分别对应于“纯” PA6结晶相和相分离的中间相的破坏。此外，与商用弹性体之一PEBAX®相比，制得的TPAE具有更好的热性能和机械性能，具有广泛用于各种工业领域的潜力。

更新日期：2018-02-27

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