摘要
采用熔融共混法制备聚对苯二甲酸-己二酸丁二酯、聚乳酸和矿粉的共混物,并探究了矿粉种类对于共混体系薄膜力学性能与延时边封性能的影响。结果表明,随着细粒径滑石粉SDC-F7的质量分数从10%提升至20%,共混薄膜穿刺强度下降29.3%,滑石粉粒径提升也会使共混薄膜的穿刺强度显著下降33.3%。延时边封测试表明,SDCF7添加质量分数为10%时,共混薄膜15 d边封强度保持率(R_(15 d))为51.4%,SDC-F7的质量分数提升至20%,R_(15 d)大幅下降至7.7%;滑石粉粒径增加,共混薄膜R_(15 d)也有显著下降;蒙脱土、硫酸钡体系薄膜力学性能和延时边封性能与SDCF7体系相当;添加CaCO_(3)-SA0(未活化CaCO_(3))的共混薄膜延时边封性能优异,R_(15 d)达到最高的62.9%,而添加CaCO_(3)-SA1.5,CaCO_(3)-SA3.0(分别为硬脂酸1.5%,3.0%活化CaCO_(3))的共混薄膜R_(15 d)分别大幅降低至12.7%和7.4%。表面微观分析发现,粗粒径滑石粉AH-1250N6共混薄膜表面观察到大粒径的矿粉突出,影响表面树脂的熔融黏接,从而使边封性能下降。CaCO_(3)-SA0的共混薄膜表面碳酸钙的暴露少,CaCO_(3)-SA3.0的共混薄膜表面有大量的碳酸钙析出表面。本研究对推广生物降解材料的应用有理论支撑。
Blends of poly(butylene adipate-co-terephthalate),polylactic acid,and mineral powders were prepared via melt blending method,and the effects of mineral powder types on the mechanical properties and delayed edge-seal performance of blend films were systematically investigated.The results demonstrate that as the mass fraction of fine-particle talc SDC-F7 increase from 10wt%to 20wt%,a 29.3%reduction in puncture strength is observed in the blend films.Additionally,the increase of talc particle size results in a significant 33.3%decrease of puncture strength.Delayed edge-seal testing reveal that when 10%SDC-F7 is incorporated,the blend film maintains 51.4%of its 15-day edge-seal strength retention rate(R_(15 d)).However,increasing SDC-F7 content to 20wt%cause R_(15 d)to dramatically decline to 7.7%.Similar performance degradation patterns are observed with increasing talc particle sizes.Comparatively,montmorillonite and barium sulfate systems exhibit comparable mechanical and edge-seal properties to SDC-F7 system.Notably,adding CaCO_(3)-SA0(unactivated CaCO_(3))modified blend film display superior delayed edge-seal performance with R_(15 d)reaching 62.9%,while those containing CaCO_(3)-SA1.5 and CaCO_(3)-SA3.0(1.5%,3.0%stearic acid activated CaCO_(3))show substantial reductions in R_(15 d)to 12.7%and 7.4%,respectively.Surface microanalysis identify large-sized mineral particle protrusions on AH-1250N6 talc-modified films,which impair surface resin fusion bonding and consequently degrade edge-seal performance.CaCO_(3)-SA0 blend film exhibits minimal calcium carbonate exposure,whereas CaCO_(3)-SA3.0-modified film display extensive surface precipitation of calcium carbonate particles.This research provides theoretical support for promoting biodegradable material applications.
作者
陈业中
陈保登
潘凯波
李禹函
张怡
尹衍升
CHEN Yezhong;CHEN Baodeng;PAN Kaibo;LI Yuhan;ZHANG Yi;YIN Yansheng(Guangdong Key Laboratory of Materials and Equipment in Harsh Marine Environment,Guangzhou Maritime University,Guangzhou 510725,China;Zhuhai Kingfa biomaterial Co.,Ltd.,Zhuhai 519050,China;College of Chemistry and Pingyuan Laboratory,Zhengzhou Key Laboratory of Elastic Sealing Materials,Zhengzhou University,Zhengzhou 450001,China)
出处
《工程塑料应用》
北大核心
2025年第5期56-62,共7页
Engineering Plastics Application
基金
国家自然科学基金青年科学基金项目(52071091,52001081)
广州市教育局高校科研项目(2024312143)。
关键词
聚对苯二甲酸己二酸丁二酯
聚乳酸
矿粉
力学性能
延时边封
poly(butylene adipate-co-terephthalate)
polylactic acid
mineral powder
mechanical property
delayed edge sealing
