Preparation of high molecular weight poly(L-lactic acid) in micro compounder

Ji Xing Xie; Rong Jie Yang

Preparation of high molecular weight poly(L-lactic acid) in micro compounder

Ji Xing Xie^*, Rong Jie Yang

^*此作品的通讯作者

材料学院

Beijing Institute of Technology

科研成果: 期刊稿件 › 文章 › 同行评审

摘要

The process of poly(L-lactic acid) (PLLA) reactive extrusion was studied in MicroCompounder. Triphenyl phosphite (TPPi) was used as chain extender to increase the molecular weight of the PLLA prepared by melt-polycondensation from L-lactic acid. The influences of the temperature, screw speed, resident time and the amount of TPPi were studied on the mixing torque of PLLA. With addition of 2% TPPi, the molecular weight of the PLLA increases from 62, 100 g/mol to 126, 000 g/mol. The structure of PLLA was kept after the reactive extrusion. The final PLLA products had low T_g and T_m due to existence of the impurities. The mechanical properties of the products are approximate to that of commercial PLLA.

源语言	英语
页（从-至）	116-119
页数	4
期刊	Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering
卷	24
期	9
出版状态	已出版 - 9月 2008

其它文件与链接

链接到 Scopus 的出版物

引用此

@article{1b9182c4550941039e3f4bf855c85660,

title = "Preparation of high molecular weight poly(L-lactic acid) in micro compounder",

abstract = "The process of poly(L-lactic acid) (PLLA) reactive extrusion was studied in MicroCompounder. Triphenyl phosphite (TPPi) was used as chain extender to increase the molecular weight of the PLLA prepared by melt-polycondensation from L-lactic acid. The influences of the temperature, screw speed, resident time and the amount of TPPi were studied on the mixing torque of PLLA. With addition of 2% TPPi, the molecular weight of the PLLA increases from 62, 100 g/mol to 126, 000 g/mol. The structure of PLLA was kept after the reactive extrusion. The final PLLA products had low Tg and Tm due to existence of the impurities. The mechanical properties of the products are approximate to that of commercial PLLA.",

keywords = "Chain extending, Poly(L-lactic acid), Reactive extrusion, Triphenyl phosphite",

author = "Xie, {Ji Xing} and Yang, {Rong Jie}",

year = "2008",

month = sep,

language = "English",

volume = "24",

pages = "116--119",

journal = "Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering",

issn = "1000-7555",

publisher = "Chengdu University of Science and Technology",

number = "9",

}

TY - JOUR

T1 - Preparation of high molecular weight poly(L-lactic acid) in micro compounder

AU - Xie, Ji Xing

AU - Yang, Rong Jie

PY - 2008/9

Y1 - 2008/9

N2 - The process of poly(L-lactic acid) (PLLA) reactive extrusion was studied in MicroCompounder. Triphenyl phosphite (TPPi) was used as chain extender to increase the molecular weight of the PLLA prepared by melt-polycondensation from L-lactic acid. The influences of the temperature, screw speed, resident time and the amount of TPPi were studied on the mixing torque of PLLA. With addition of 2% TPPi, the molecular weight of the PLLA increases from 62, 100 g/mol to 126, 000 g/mol. The structure of PLLA was kept after the reactive extrusion. The final PLLA products had low Tg and Tm due to existence of the impurities. The mechanical properties of the products are approximate to that of commercial PLLA.

AB - The process of poly(L-lactic acid) (PLLA) reactive extrusion was studied in MicroCompounder. Triphenyl phosphite (TPPi) was used as chain extender to increase the molecular weight of the PLLA prepared by melt-polycondensation from L-lactic acid. The influences of the temperature, screw speed, resident time and the amount of TPPi were studied on the mixing torque of PLLA. With addition of 2% TPPi, the molecular weight of the PLLA increases from 62, 100 g/mol to 126, 000 g/mol. The structure of PLLA was kept after the reactive extrusion. The final PLLA products had low Tg and Tm due to existence of the impurities. The mechanical properties of the products are approximate to that of commercial PLLA.

KW - Chain extending

KW - Poly(L-lactic acid)

KW - Reactive extrusion

KW - Triphenyl phosphite

UR - http://www.scopus.com/inward/record.url?scp=54749134329&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:54749134329

SN - 1000-7555

VL - 24

SP - 116

EP - 119

JO - Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering

JF - Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering

IS - 9

ER -

Preparation of high molecular weight poly(L-lactic acid) in micro compounder

摘要

其它文件与链接

指纹

引用此