The Crystalline Superstructure of Polylactide ( PLA) and PLA/ramie Fiber Bio-composites under Strong Shear Flow-中国聚合物网,论文下载

The Crystalline Superstructure of Polylactide ( PLA) and PLA/ramie Fiber Bio-composites under Strong Shear Flow

资料类型：

PDF文件

关键词：

Polylactide Shish-kebabs Transcrystallinity Hybrid shish-kebab Ramie fibe

资料大小：

78K

所属学科：

通用高分子材料

来源：

来源网络

简介：

Theflow-inducedshish-kebabsofpolyolefinshavebeenwelldemonstratedtobehighlybeneficialtomechanicalstrength,toughness,heatresistance,gasbarrier,etc.However,itisstillachallengetoachievenumerousshish-kebabsofbiodegradablepoly(L-lacticacid)(PLLA)duetoitsshortchainlengthandsemi-rigidchainbackbonecomparedtopolyolefinscl].Inthiswork,anovelinjectionmoldingtechnology,namedoscillationshearinjectionmolding(OSIM),wasappliedtoprovideanintenseshearflowonPLLAmeltincavity,inordertoaccelerateshear-inducedcrystallizationofPLLAininjectionmoldedPLLAandPLLA/ramiefiberbio-composites.Numerousofshish-kebabsofPLLAhavebeensuccessfullyachievedininjection-moldedPLLAforthefirsttime[2],andhighresolutionscanningelectronmicroscopyrevealsadiameterofaround0.7ymandalongperiodof一20nmfortheshish-kebabsuperstructure.Moreinterestingly,besidestheformationofclassicshish-kebabs,shearflow-driventranscrystallinity(TC)onramiefibersurfaceandhybridshish-kebabsuperstructureinducedbyramienanofibersweredirectlyachievedinPLLA/ramiefiberbiocompositesbyusingOSIM.Therelationshipbetweenthesenovelsuperstructuresandmechanicalpropertieswasalsoinvestigated.Theresultsshowthatamoderateimprovementofthemechanicalpropertiessuchasthetensilestrengthandstiffnesscanbeobtainedduetothepresenceofshishkebabs.Moreintriguingly,withtheexistenceofTC,hybridshish-kebabsandramiefibers,anoteworthypromotionintensilestrength,stiffnesstensilemodulusandNotchedimpactstrengthisachievedinthebiocomposites,obtainingsubstantialincreaseof一22%,～41%and～120%comparedtotheneatPLLAsamplemoldedbyconventionalinjectionmolding,respectively.Itisbelievedthatfurtherexplorationwillprovidearichfundamentalunderstandingintheshear-inducedcrystallizationandmorphologymanipulationofPLLA,aimingtoachievesuperiorPLLAproductsininjectionmoldingprocess.

上传人：

liu

上传时间：

2013-06-28 17:13:47

下载次数：

消耗积分：

立即下载：

好

1人

中

1人

差

1人

友情提示：下载后对该资源进行评论，即可奖励2分。

报告错误：

1.下载无效　 2. 资料明显无价值　 3. 资料重复存在

相关评论 共有0人发表评论

更多评论

你还没有登录，无法发表评论，请首先

免责声明：本站部分资源由网友推荐，来自互联网，版权属于原版权人，如果不慎侵犯到您的权利，敬请告知，我们会在第一时间撤除。本站中各网友的评论只代表其个人观点，不代表本站同意其观点。

最新上传资料
·	Fabrication of Phosphate-Impr...
·	Controllable Black or White l...
·	(J. Am. Chem. Soc.) Interpene...
·	Photosensitizer-Loaded Multif...
·	聚酯型热塑性聚氨酯弹性体的合成...
·	58 Nitrogen-doped porous carb...
·	18 Striking influence of Fe2O...
·	17 Catalytic conversion of li...
·	13 Catalytic carbonization of...
·	10 Synthesis and characteriza...
·	09 Effect of nanosized carbon...
·	04 Effect of Cl/Ni molar rati...
·	Highly Sensitive temperature ...
更多>>

热点资料
·	可再生资源高分子共混与复合材料
·	纳米全硫化粉末橡胶对硬质聚氯乙...
·	冷冻相分离法制备壳聚糖微孔材料
·	有机硅胶粘剂
·	中国合成橡胶工业现状及展望
·	纳米CaCO3表面PMMA接枝聚合改...
·	木塑复合材料的研发与产业发展
·	橡胶的纳米增强技术与理论
·	三次采油驱油用聚丙烯酰胺的交联...
·	含芳杂环结构的新型的超支化聚合...
·	增塑剂对玉米淀粉糊化的影响
·	新型的无卤聚丙烯/含硅大分子膨...
·	水性涂料用有机硅改性苯丙乳液的...
更多>>

相关资料
·	Silver Nanoparticle/Multiwall...
·	Gold Nanoparticle/Multi-walle...
·	Electrospun Pitch/Polyacrylon...
·	Nanostructured SiO2/C composi...
·	Electrospun and solution blow...
·	07 Insight on striking influe...
·	Highly Sensitive temperature ...
更多>>