Effect of Nucleating Agent on Strain-induced Crystallization of Films

被引:0
|
作者
Chen, Zhe-feng [1 ]
Zhang, Shu-yang [1 ]
Wu, Feng [1 ]
Feng, Jian-ming [1 ]
Liu, Zheng-ying [1 ]
Yang, Ming-bo [1 ]
机构
[1] Sichuan Univ, State Key Lab Polymer Mat Engn, Coll Polymer Sci & Engn, Chengdu 610065, Peoples R China
关键词
Train; Nucleating agent; Strain-induced crystallization; Arrangement of chains; POLY(L-LACTIC ACID); POLY(LACTIC ACID); BEHAVIOR; POLYLACTIDE; KINETICS; PLA;
D O I
暂无
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
To make the nucleating agent and the strain-induced crystallization work synergistically, the effect of nucleating agent on the strain-induced crystallization of poly (lactic acid) (PLA) films is investigated. Amorphous film samples of pure PLA (T0) and PLA/TMC328 (specialized nucleating agent) blends with different contents of TMC328 (0.5 wt%,1 wt% denoted as T0. 5,T1) are prepared and characterized by Xray diffraction (XDR) and differential scanning calorimetry (DSC). Then they are drawn at temperatures of 80 and 90 degrees C, about 24 similar to 34 K above T-g. And the crystallinity of drawn samples is measured by DSC and Fourier transform infrared spectroscopy (FTIR). Unexpected, at 80 and 90 degrees C the crystallinity of T0 is much higher than those of T0. 5 and T1, even though the nucleating agent can improve the cold crystallization of PLA significantly at 90 degrees C. Moreover, the strain-induced crystallization works better and more stably at T-d of 80 degrees C than at T-d of 90 degrees C. Then a new crystallization mechanism can be presented,which is independent of nucleation density even nucleation, but dominated by the formation and retention of strain-induced regular conformation. And the strain-induced crystallization works better with lower T-d, at which the intensity of the chain thermal motion is weaker and the formation of regular conformation can be easier. Therefore, during the process of strain-induced crystallization, the nucleating agent diffusing between the PLA chains plays a role of impurity which impedes the formation of regular conformation of PLA chains. So the synergy of improving crystallization cannot be achieved by the addition of nucleating agent.
引用
收藏
页码:1121 / 1127
页数:7
相关论文
共 25 条
  • [11] Quantitative Nanomechanical Investigation on Deformation of Poly(lactic acid)
    Liu, Hao
    Chen, Na
    Fujinami, So
    Louzguine-Luzgin, Dmitri
    Nakajima, Ken
    Nishi, Toshio
    [J]. MACROMOLECULES, 2012, 45 (21) : 8770 - 8779
  • [12] Stretch-induced molecular ordering in amorphous/crystalline polylactide blends
    Lv, Ruihua
    Zou, Shufen
    Na, Bing
    Pan, Huayan
    Deng, Huiyu
    [J]. POLYMER ENGINEERING AND SCIENCE, 2013, 53 (01): : 21 - 26
  • [13] Time resolved study of oriented crystallisation of poly(lactic acid) during rapid tensile deformation
    Mahendrasingam, A
    Blundell, DJ
    Parton, M
    Wright, AK
    Rasburn, J
    Narayanan, T
    Fuller, W
    [J]. POLYMER, 2005, 46 (16) : 6009 - 6015
  • [14] Crystallization behaviour of poly(L-lactide)
    Miyata, T
    Masuko, T
    [J]. POLYMER, 1998, 39 (22) : 5515 - 5521
  • [15] Layered Metal Phosphonate Reinforced Poly(L-lactide) Composites with a Highly Enhanced Crystallization Rate
    Pan, Pengju
    Liang, Zhichao
    Cao, Amin
    Inoue, Yoshio
    [J]. ACS APPLIED MATERIALS & INTERFACES, 2009, 1 (02) : 402 - 411
  • [16] Study of Strain-Induced Crystallization and Enzymatic Degradation of Drawn Poly(L-lactic acid) (PLLA) Films
    Rangari, Deepika
    Vasanthan, Nadarajah
    [J]. MACROMOLECULES, 2012, 45 (18) : 7397 - 7403
  • [17] Crystallization behavior and nucleation analysis of poly(l-lactic acid) with a multiamide nucleating agent
    Song, Ping
    Wei, Zhiyong
    Liang, Jicai
    Chen, Guangyi
    Zhang, Wanxi
    [J]. POLYMER ENGINEERING AND SCIENCE, 2012, 52 (05): : 1058 - 1068
  • [18] New Insights on the Strain-Induced Mesophase of Poly(D,L-lactide): In Situ WAXS and DSC Study of the Thermo-Mechanical Stability
    Stoclet, G.
    Seguela, R.
    Lefebvre, J. -M.
    Rochas, C.
    [J]. MACROMOLECULES, 2010, 43 (17) : 7228 - 7237
  • [19] Strain-Induced Molecular Ordering in Polylactide upon Uniaxial Stretching
    Stoclet, G.
    Seguela, R.
    Lefebvre, J. M.
    Elkoun, S.
    Vanmansart, C.
    [J]. MACROMOLECULES, 2010, 43 (03) : 1488 - 1498
  • [20] Colloquium: Laws controlling crystallization and melting in bulk polymers
    Strobl, Gert
    [J]. REVIEWS OF MODERN PHYSICS, 2009, 81 (03) : 1287 - 1300