N, N′-Bis(benzoyl) adipic acid dihydrazide and talc: nucleating agents for poly(L-lactic acid)

被引:6
作者
Xue, Bai [1 ]
Guo, Dan [1 ]
Bao, Jianjun [1 ]
机构
[1] Sichuan Univ, Polymer Res Inst, State Key Lab Polymer Mat Engn, Chengdu 610065, Peoples R China
关键词
crystallization behavior; heat resistance; organic nucleating agent; poly(L-lactic acid) (PLLA); MULTIPLE MELTING BEHAVIOR; CRYSTALLIZATION BEHAVIOR; MECHANICAL-PROPERTIES; POLY(METHYL METHACRYLATE); KINETICS; POLYMERIZATION; DEGRADATION; COMPLEX;
D O I
10.1515/polyeng-2015-0298
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
In this paper, high-heat-resistant polymeric composite products were prepared via the traditional melt blending process by incorporating N, N'-bis(benzoyl) adipic acid dihydrazide (BAAD) into poly(L-lactic acid) (PLLA), which acted as an organic nucleating agent. The heat distortion temperature (HDT) of the PLLA/BAAD composite samples was measured by an HDT apparatus, and a high value of 96.2 degrees C was achieved at a BAAD loading fraction of 0.5 wt.%, whereas, at the same processing conditions, the HDT of PLLA/talc specimens reached a similar value at a talc content of 20 wt.%, which was much higher than the BAAD content. Differential scanning calorimetry and X-ray diffraction analyses were applied to determine the melting and crystallization behavior of the PLLA/BAAD blends. Polarized optical microscopy was used to observe the crystalline morphologies. Thermogravimetric analysis was employed to study the effect of BAAD on the thermal stability of PLLA. Measurement of the mechanical property confirmed that the addition of BAAD was beneficial to the enhancement of the mechanical properties of the resulting blends. However, the tensile strength of the PLLA/talc composites decreased with increasing weight fraction of talc.
引用
收藏
页码:381 / 390
页数:10
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