The Performance Investigation of PLLA/PPAPH : The Influence of PPAPH as Heterogeneous Crystal Nuclei
作者全名：Zhao, Lisha; Lv, Yang; Chen, Jiale; Huang, Hao; Zhou, Xiaoqin; Cai, Yanhua
作者地址：[Zhao, Lisha; Lv, Yang; Chen, Jiale; Huang, Hao; Cai, Yanhua] Chongqing Univ Arts & Sci, 319 Honghe Rd, Chongqing 402160, Peoples R China; [Zhou, Xiaoqin] Chongqing Med Univ, Bishan Hosp, 9 Shuangxing Rd, Chongqing 402760, Peoples R China
通信作者：Cai, YH (通讯作者)，Chongqing Univ Arts & Sci, 319 Honghe Rd, Chongqing 402160, Peoples R China.
来源：MATERIALE PLASTICE
ESI学科分类：MATERIALS SCIENCE
WOS号：WOS:001198444200011
JCR分区：Q4
影响因子：0.6
年份：2024
卷号：61
期号：1
开始页：157
结束页：169
文献类型：Article
关键词：poly(L-lactide); phenylacetic hydrazide; heterogeneous nucleating agent; melt-crystallization; fluidity
摘要：To overcome PLLA's poor crystallization capability, using nucleating agent as crystallization improvement strategy was performed in this study. PPAPH as PLLA's an organic nucleating agent was firstly synthesized, and then PLLA was blended with different PPAPH loading through melting blend method, the resulting influences of PPAPH on PLLA's performances were investigated using the relevant testing instruments. Melt -crystallization revealed that PPAPH played important role in promoting PLLA's crystallization through providing effective sites of heterogeneous nucleation, and effect of PPAPH loading on PLLA's melt -crystallization was very poor, indicating that low PPAPH loading could cause PLLA to possess powerful crystallization capacity. In addition, the relative low final melting temperature was beneficial for PLLA/PPAPH's crystallization. However, an increase of cooling rate during cooling stage weakened PLLA/PPAPH's crystallization capacity. PLLA/PPAPH's coldcrystallization suggested that PPAPH had an inhibition effect on cold -crystallization process to some extent. Melting behaviors depended on heating rate and previous crystallization including meltcrystallization at various cooling rates and isothermal crystallization at various crystallization temperatures. PPAPH enhanced PLLA's fluidity, tensile modulus and tensile strength. Unfortunately, PLLA's transmittance was seriously weakened as PPAPH loading increased, as well as the elongation at break continuously decreased.
基金机构：Chongqing Science and Technology Bureau [CSTB2023NSCQ-MSX1087]; Chongqing Municipal Education Commission [KJZD-K202301303]; Chongqing University of Arts and Sciences [P2020HH06, Y2022HH02]
基金资助正文：This work was supported by Chongqing Science and Technology Bureau (CSTB2023NSCQ-MSX1087) , Chongqing Municipal Education Commission (KJZD-K202301303) and Chongqing University of Arts and Sciences (project number P2020HH06 and Y2022HH02) .
