Formation, structure and promoting crystallization capacity of stereocomplex crystallite network in the poly(lactide) blends based on linear PLLA and PDLA with different structures

被引：51

作者：

Jing, Zhanxin ^{[1
]}

Shi, Xuetao ^{[1
]}

Zhang, Guangcheng ^{[1
]}

Li, Jiang ^{[1
]}

Li, Jianwei ^{[1
]}

Zhou, Lisheng ^{[1
]}

Zhang, Hongming ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Coll Sci, MOE Key Lab Appl Phys & Chem Space, Xian 710072, Peoples R China

来源：

POLYMER | 2016年 / 92卷

基金：

美国国家科学基金会;

关键词：

Stereocomplex; Crystallization; Rheology; Network structure; MULTIWALLED CARBON NANOTUBES; POLY(L-LACTIC ACID); POLY(D-LACTIC ACID); POLYLACTIDE STEREOCOMPLEX; VISCOELASTIC BEHAVIOR; NANOCOMPOSITES; COMPOSITES; MORPHOLOGY; NUCLEATION; COPOLYMERS;

D O I：

10.1016/j.polymer.2016.04.001

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A series of asymmetric PLLA/PDLA blends based on linear PLLA and PDLA (linear PDLA and star-shaped PDLA) were prepared by solution blending, and stereocomplex crystallites (sc-crystallites) were formed between PLLA and various PDLA due to strong hydrogen bonding. Rheological results indicated that the melt strength of PLLA was improved due to the network structure of sc-crystallites in the PLLA melt. The effect of PDLA on rheological behavior of the melt decreased in the following order: 6PDLA > L-PDLA > 3PDLA > 4PDLA. Dissolution experiment revealed that the formed network structure could be formed by interparticle polymer chains or branched points. Nonisothermal and isothermal crystallization showed that the promoting crystallization of sc-crystallites for PLLA was closely related to thermal treatment temperature, crystallization temperature and the structure of PDLA, and the PDLA structure could change the pattern of crystal growth during isothermal crystallization. Nucleation efficiency of sc-crystallites during non-isothermal crystallization decreased with increasing of arm numbers of PDLA. POM results also demonstrated that the nucleation and spherulite growth during isothermal crystallization were affected by the PDLA structure. This study has systemically investigated the effects of the PDLA structure on rheology and crystallization capacity of asymmetric PLLA/PDLA blends, which would provide potential approaches to control the microstructure and physical performances of PLLA/PDLA blends. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：210 / 221

页数：12

共 52 条

[1] Measurements of the rheological behavior of a crystallizing polymer by an "inverse quenching" technique [J].

Acierno, S ;

Grizzuti, N .

JOURNAL OF RHEOLOGY, 2003, 47 (02) :563-576

[2] Melt preparation and nucleation efficiency of polylactide stereocomplex crystallites [J].

Anderson, KS ;

Hillmyer, MA .

POLYMER, 2006, 47 (06) :2030-2035

[3] Control of Crystal Morphology in Poly(L-lactide) by Adding Nucleating Agent [J].

Bai, Hongwei ;

Zhang, Weiyi ;

Deng, Hua ;

Zhang, Qin ;

Fu, Qiang .

MACROMOLECULES, 2011, 44 (06) :1233-1237

[4] Mechanism of the stereocomplex formation between enantiomeric poly(lactide)s [J].

Brizzolara, D ;

Cantow, HJ ;

Diederichs, K ;

Keller, E ;

Domb, AJ .

MACROMOLECULES, 1996, 29 (01) :191-197

[5] STEREOCOMPLEXATION AND MORPHOLOGY OF POLYLACTIDES [J].

BROCHU, S ;

PRUDHOMME, RE ;

BARAKAT, I ;

JEROME, R .

MACROMOLECULES, 1995, 28 (15) :5230-5239

[6] Viscoelastic behavior of semicrystalline thermoplastic polymers during the early stages of crystallization [J].

Coppola, S ;

Acierno, S ;

Grizzuti, N ;

Vlassopoulos, D .

MACROMOLECULES, 2006, 39 (04) :1507-1514

[7] Stereocomplex formation through reorganization of poly(L-lactic acid) and poly(D-lactic acid) crystals [J].

Fujita, Masahiro ;

Sawayanagi, Tomoharu ;

Abe, Hideki ;

Tanaka, Toshihisa ;

Iwata, Tadahisa ;

Ito, Kazuki ;

Fujisawa, Tetsuro ;

Maeda, Mizuo .

MACROMOLECULES, 2008, 41 (08) :2852-2858

[8] Stereocomplex crystallization of high-molecular-weight poly(L-lactic acid)/poly(D-lactic acid) racemic blends promoted by a selective nucleator [J].

Han, Lili ;

Pan, Pengju ;

Shan, Guorong ;

Bao, Yongzhong .

POLYMER, 2015, 63 :144-153

[9] Structure-properties of super-tough PLA alloy with excellent heat resistance [J].

Hashima, Kazuhiro ;

Nishitsuji, Shotaro ;

Inoue, Takashi .

POLYMER, 2010, 51 (17) :3934-3939

[10] Synthesis of ABCBA Penta Stereoblock Polylactide Copolymers by Two-Step Ring-Opening Polymerization of L- and D-Lactides with Poly(3-methyl-1,5-pentylene succinate) as Macroinitiator (C): Development of Flexible Stereocomplexed Polylactide Materials [J].

Hirata, Masayuki ;

Masutani, Kazunari ;

Kimura, Yoshiharu .

BIOMACROMOLECULES, 2013, 14 (07) :2154-2161

← 1 2 3 4 5 6 →