{"title":"通过原位形成立体复合聚乳酸晶体提高聚(L-乳酸)/钴纤维复合材料的流变、结晶、机械和耐热性能","authors":"Hongda Cheng, Lijuan Wang, Changyu Han","doi":"10.1002/app.56280","DOIUrl":null,"url":null,"abstract":"Due to its favorable mechanical strength, transparency, and biocompatibility, polylactic acid (PLA) has considerable potential as a biodegradable material. Nevertheless, developing high-performance PLA composites through environmentally friendly and cost-effective methods remains a significant challenge. In this study, the composites comprising poly(L-lactide) (PLLA), basalt fibers (BFs), and poly(D-lactide) (PDLA) are prepared through facile melt blending. The in situ formed stereocomplex polylactide (SC-PLA) crystals improve the crystallization ability and rheological behavior of PLLA/BF/PDLA composites. Upon adding 5 wt% PDLA, BFs are nicely dispersed in PLLA matrix because of increased shear intensity. The synergistic effect of BFs and SC-PLA crystals enhances the mechanical, thermomechanical, and heat resistance properties of PLLA. In particular, PLLA/BF/10%PDLA composites exhibit a Vicat Softening Temperature (VST) of 155.5°C, increasing by approximately 100°C over neat PLLA. Annealing treatment increases the Young's modulus, thermomechanical properties, and VST of samples while reducing their tensile strength. Interestingly, the tensile strength of the annealed PLLA/BF/10%PDLA composites is 50.2 MPa, twice that of the annealed neat PLLA due to the introduction of SC-PLA crystals. Simultaneously improving the rheological, mechanical, and heat resistance performance of PLLA opens possibilities for expanding its potential applications in the industrial field.","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":null,"pages":null},"PeriodicalIF":2.7000,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhanced rheological, crystallization, mechanical, and heat resistance performance of poly(L-lactide)/basalt fibers composites via in situ formation of stereocomplex polylactide crystals\",\"authors\":\"Hongda Cheng, Lijuan Wang, Changyu Han\",\"doi\":\"10.1002/app.56280\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Due to its favorable mechanical strength, transparency, and biocompatibility, polylactic acid (PLA) has considerable potential as a biodegradable material. Nevertheless, developing high-performance PLA composites through environmentally friendly and cost-effective methods remains a significant challenge. In this study, the composites comprising poly(L-lactide) (PLLA), basalt fibers (BFs), and poly(D-lactide) (PDLA) are prepared through facile melt blending. The in situ formed stereocomplex polylactide (SC-PLA) crystals improve the crystallization ability and rheological behavior of PLLA/BF/PDLA composites. Upon adding 5 wt% PDLA, BFs are nicely dispersed in PLLA matrix because of increased shear intensity. The synergistic effect of BFs and SC-PLA crystals enhances the mechanical, thermomechanical, and heat resistance properties of PLLA. In particular, PLLA/BF/10%PDLA composites exhibit a Vicat Softening Temperature (VST) of 155.5°C, increasing by approximately 100°C over neat PLLA. Annealing treatment increases the Young's modulus, thermomechanical properties, and VST of samples while reducing their tensile strength. Interestingly, the tensile strength of the annealed PLLA/BF/10%PDLA composites is 50.2 MPa, twice that of the annealed neat PLLA due to the introduction of SC-PLA crystals. Simultaneously improving the rheological, mechanical, and heat resistance performance of PLLA opens possibilities for expanding its potential applications in the industrial field.\",\"PeriodicalId\":183,\"journal\":{\"name\":\"Journal of Applied Polymer Science\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.7000,\"publicationDate\":\"2024-09-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Applied Polymer Science\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://doi.org/10.1002/app.56280\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"POLYMER SCIENCE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Applied Polymer Science","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1002/app.56280","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
Enhanced rheological, crystallization, mechanical, and heat resistance performance of poly(L-lactide)/basalt fibers composites via in situ formation of stereocomplex polylactide crystals
Due to its favorable mechanical strength, transparency, and biocompatibility, polylactic acid (PLA) has considerable potential as a biodegradable material. Nevertheless, developing high-performance PLA composites through environmentally friendly and cost-effective methods remains a significant challenge. In this study, the composites comprising poly(L-lactide) (PLLA), basalt fibers (BFs), and poly(D-lactide) (PDLA) are prepared through facile melt blending. The in situ formed stereocomplex polylactide (SC-PLA) crystals improve the crystallization ability and rheological behavior of PLLA/BF/PDLA composites. Upon adding 5 wt% PDLA, BFs are nicely dispersed in PLLA matrix because of increased shear intensity. The synergistic effect of BFs and SC-PLA crystals enhances the mechanical, thermomechanical, and heat resistance properties of PLLA. In particular, PLLA/BF/10%PDLA composites exhibit a Vicat Softening Temperature (VST) of 155.5°C, increasing by approximately 100°C over neat PLLA. Annealing treatment increases the Young's modulus, thermomechanical properties, and VST of samples while reducing their tensile strength. Interestingly, the tensile strength of the annealed PLLA/BF/10%PDLA composites is 50.2 MPa, twice that of the annealed neat PLLA due to the introduction of SC-PLA crystals. Simultaneously improving the rheological, mechanical, and heat resistance performance of PLLA opens possibilities for expanding its potential applications in the industrial field.
期刊介绍:
The Journal of Applied Polymer Science is the largest peer-reviewed publication in polymers, #3 by total citations, and features results with real-world impact on membranes, polysaccharides, and much more.