Effect of Poly(styrene-ran-methyl acrylate) Inclusion on the Compatibility of Polylactide/Polystyrene-b-Polybutadiene-b-Polystyrene Blends Characterized by Morphological, Thermal, Rheological, and Mechanical Measurements
Effect of Poly(styrene-ran-methyl acrylate) Inclusion on the Compatibility of Polylactide/Polystyrene-b-Polybutadiene-b-Polystyrene Blends Characterized by Morphological, Thermal, Rheological, and Mechanical Measurements
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聚（苯乙烯-丙烯酸甲酯）夹杂物对聚丙交酯/聚苯乙烯-b-聚丁二烯-b-聚苯乙烯共混物相容性的影响，通过形态、热、流变和机械测量进行表征
DOI：
10.3390/polym11050846
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发表时间：
2019-05
期刊：
影响因子：
5
通讯作者：
Gong Xinghou
中科院分区：
文献类型：
--
作者：
Wang Bocheng;Tu Zheng;Wu Chonggang;Hu Tao;Wang Xiaotao;Long Shijun;Gong Xinghou
采用无皂乳液聚合法合成了苯乙烯-丙烯酸甲酯（75/25 mol/mol）共聚物（S-MA），并将其作为聚苯乙烯-b-聚丁二烯-b-聚苯乙烯（SBS）增韧聚乳酸（PLA）共混物的增容剂。增容后，共混物的分散相形态得到细化，结晶度随非晶界面的增加而降低，热稳定性得到改善，这可能是由于界面较厚、较强，对热能不敏感，最大分解速率温度趋于一致，复数粘度、动态储能模量和损耗模量增大，Han图中高频末端区域的分支度降低，Cole-Cole图中的链节半径增加，这是由于界面相的厚度和链缠结度增加导致链节弛豫时间延长。当S-MA含量从0增加到3.0wt%时，共混物的拉伸性能显著改善，直到1.0wt%，高于1.0wt%，它们然后增加不显著，而冲击强度在最佳S-MA含量约1.0wt%时最大，假设由于介质的平衡效应-尺寸SBS颗粒对PLA基体中已有银纹的稳定和新银纹的引发的影响。这些观察结果证实，S-MA，在我们的实验室首次合成的无规共聚物，作为一个有效的增容剂的PLA/SBS共混物。
A poly(styrene-ran-methyl acrylate) (S-MA) (75/25 mol/mol), synthesized by surfactant-free emulsion copolymerization, was used as a compatibilizer for polystyrene-b-polybutadiene-b-polystyrene (SBS)-toughened polylactide (PLA) blends. Upon compatibilization, the blends exhibited a refined dispersed-phase morphology, a decreased crystallinity with an increase in their amorphous interphase, improved thermal stability possibly from the thicker, stronger interfaces insusceptible to thermal energy, a convergence of the maximum decomposition-rate temperatures, enhanced magnitude of complex viscosity, dynamic storage and loss moduli, a reduced ramification degree in the high-frequency terminal region of the Han plot, and an increased semicircle radius in the Cole–Cole plot due to the prolonged chain segmental relaxation times from increases in the thickness and chain entanglement degree of the interphase. When increasing the S-MA content from 0 to 3.0 wt %, the tensile properties of the blends improved considerably until 1.0 wt %, above which they then increased insignificantly, whereas the impact strength was maximized at an optimum S-MA content of ~1.0 wt %, hypothetically due to balanced effects of the medium-size SBS particles on the stabilization of preexisting crazes and the initiation of new crazes in the PLA matrix. These observations confirm that S-MA, a random copolymer first synthesized in our laboratory, acted as an effective compatibilizer for the PLA/SBS blends.
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DOI：
10.1002/polb.21056
发表时间：
2007-02
期刊：
Journal of Polymer Science Part B
影响因子：
--
作者：
Yeong-Tarng Shieh;Ginger L. Liu
通讯作者：
Yeong-Tarng Shieh;Ginger L. Liu
聚乳酸与甲基丙烯酸缩水甘油酯接枝聚乙烯辛烷二元共混物的相容性和相结构
影响因子：
6
作者：
Su, Zhizhong;Li, Qiuying;Wu, Chifei
通讯作者：
Wu, Chifei
影响因子：
4.4
作者：
Cole, KS;Cole, RH
通讯作者：
Cole, RH
影响因子：
5
作者：
Lis-Bartos, Anna;Smieszek, Agnieszka;Marycz, Krzysztof
通讯作者：
Marycz, Krzysztof
影响因子：
5.9
作者：
Jelcic, Z;Hojevac-Grguric, T;Rek, V
通讯作者：
Rek, V