ICCAS OpenIR
Multiple Relaxation Behavior of Long Chain Branched Polylactic Acid
Wang Yong-Bin1,2; Niu Yan-Hua1; Yang Liang1,2; Yu Feng-Yuan3; Zhang Hong-Bin3; Wang Zhi-Gang1
2010-02-10
Source PublicationCHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
ISSN0251-0790
Volume31Issue:2Pages:397-401
AbstractThe long chain branched polylactic acid(PLA) samples were successfully fabricated by high energy irradiation in the presence of a small amount of poly-functional monomer. The branched structures of PLA were convinced by size exclusion chromatography(SEC) coupled with a multi-angle laser light scattering(MALLS). By the means of oscillatory shear and creep measurements, the shear rheological behavior of branched PLA was investigated. Meanwhile, the weighted relaxation spectra of PLA were calculated in light of the combined dynamic modulus data. The multiple relaxation behavior of PLA, which was attributed to the existence of different lengths of long chain branches, was actually observed. In addition, a novel procedure for quantificational determination of the lengths of branches and the arm molecular weight of PLA was put forward. It was found that the lengths of branches of PLA were extended and the arm molecular weight was enhanced with increasing amount of poly-futictional monomer. The above results could facilitate the fabrication of long chain branched PLA with well-controlled branched structures and improved rheological properties that may dominate the future bio-plastics industry.
KeywordPolylactic Acid Long Chain Branching Shear Rheology Multiple Relaxation Behavior Degree Of Branching
Indexed BySCI
Language英语
WOS IDWOS:000275476600036
PublisherHIGHER EDUCATION PRESS
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/70944
Collection中国科学院化学研究所
Corresponding AuthorWang Zhi-Gang
Affiliation1.Chinese Acad Sci, Inst Chem, Key Lab Engn Plast, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
3.Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China
Recommended Citation
GB/T 7714
Wang Yong-Bin,Niu Yan-Hua,Yang Liang,et al. Multiple Relaxation Behavior of Long Chain Branched Polylactic Acid[J]. CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,2010,31(2):397-401.
APA Wang Yong-Bin,Niu Yan-Hua,Yang Liang,Yu Feng-Yuan,Zhang Hong-Bin,&Wang Zhi-Gang.(2010).Multiple Relaxation Behavior of Long Chain Branched Polylactic Acid.CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,31(2),397-401.
MLA Wang Yong-Bin,et al."Multiple Relaxation Behavior of Long Chain Branched Polylactic Acid".CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE 31.2(2010):397-401.
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