scholarly journals Crystallization and morphological transition of poly(l-lactide)–poly(ε-caprolactone) diblock copolymers with different block length ratios

RSC Advances ◽  
2017 ◽  
Vol 7 (36) ◽  
pp. 22515-22523 ◽  
Author(s):  
Weiqiang Han ◽  
Xia Liao ◽  
Qi Yang ◽  
Guangxian Li ◽  
Bin He ◽  
...  
Keyword(s):  
Crystallization Temperature ◽  
Diblock Copolymers ◽  
Block Length ◽  
Morphological Transition ◽  
The Relationship

The crystallization temperature has an effect on the relationship between the lamellar twisting and the morphological transition of PLLA.

Crystallization-driven one-dimensional self-assembly of polyethylene-b-poly(tert-butylacrylate) diblock copolymers in DMF: effects of crystallization temperature and the corona-forming block

Soft Matter ◽  
2016 ◽  
Vol 12 (1) ◽  
pp. 67-76 ◽  
Author(s):  
Bin Fan ◽  
Lei Liu ◽  
Jun-Huan Li ◽  
Xi-Xian Ke ◽  
Jun-Ting Xu ◽  
...  
Keyword(s):  
Crystallization Temperature ◽  
Self Assembly ◽  
Diblock Copolymers ◽  
Block Length ◽  
One Dimensional ◽  
Cylindrical Micelles

Crystallization temperature and the PtBA block length affect the growth of crystalline PE-b-PtBA cylindrical micelles, and quasi-living growth can be achieved.

Controlled Crystallization of Diblock Copolymers on Carbon Materials: Effect of Block Length

2022 ◽  
pp. 152487
Author(s):  
Xi Zhang ◽  
Panpan Dang ◽  
Bo Deng ◽  
Xiaochao Xia ◽  
Kaiti Wang ◽  
...  
Keyword(s):  
Diblock Copolymers ◽  
Carbon Materials ◽  
Block Length ◽  
Controlled Crystallization

Calculation of the temperature of crystallization of silicates from basaltic melts

1981 ◽  
Vol 44 (333) ◽  
pp. 19-26 ◽  
Author(s):  
W. J. French ◽  
E. P. Cameron
Keyword(s):  
Crystallization Temperature ◽  
Maximum Error ◽  
Average Error ◽  
Multivariate Statistical Techniques ◽  
Multivariate Statistical ◽  
Marquesas Islands ◽  
Melt Composition ◽  
The Relationship ◽  
Basaltic Melts

AbstractThis paper discusses the relationship between the chemical composition of basic melts and the temperatures at which olivine, clinopyroxene, and plagioclase begin to crystallize at one atmosphere. Diagrams are given which show the correlation between crystallization temperature and melt composition and which allow some of the temperatures to be estimated. Because the relationship between melt composition and crystallization temperature is virtually linear over short compositional ranges, the data available can be subdivided and examined by linear multivariate statistical techniques. The result is a set of equations which permit the crystallization temperatures to be calculated with an average error of less than 6 °C and a maximum error of 27 °C. These equations have been tested by experimental determination of crystallization temperatures for a range of rocks from the Marquesas Islands.

scholarly journals Effects of Molecular Weight and Crystallization Temperature on the Morphology Formation in Asymmetric Diblock Copolymers with a Highly Crystalline Block

2000 ◽  
Vol 32 (7) ◽  
pp. 602-609 ◽  
Author(s):  
Awaludin Rohadi ◽  
Ryuji Endo ◽  
Satoshi Tanimoto ◽  
Shintaro Sasaki ◽  
Shuichi Nojima
Keyword(s):  
Molecular Weight ◽  
Crystallization Temperature ◽  
Diblock Copolymers

Mechanical properties and hydrolytic degradation of methoxy poly(ethylene glycol)-b-poly(DL-lactide-coglycolide- co-ε-caprolactone) diblock copolymer films

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Nongnit Morakot ◽  
Jirasak Threeprom ◽  
Yodthong Baimark
Keyword(s):  
Mechanical Properties ◽  
Weight Loss ◽  
Ethylene Glycol ◽  
Diblock Copolymers ◽  
Hydrolytic Degradation ◽  
Size Exclusion ◽  
Block Length ◽  
Poly Ethylene Glycol ◽  
Scanning Calorimetry ◽  
Poly Ethylene

AbstractBiodegradable films of methoxy poly(ethylene glycol)-b-poly(DL-lactideco- glycolide-co-ε-caprolactone) diblock copolymers (MPEG-b-PDLLGCL) were prepared by solution casting method. Effects of MPEG block length and DLL:G:CL ratio of the MPEG-b-PDLLGCL films on their mechanical properties and hydrolytic degradation were studied and discussed. It was found that the mechanical properties of films were strongly dependent on glass transition temperatures (Tg) of the diblock copolymers. The hydrolytic degradation was investigated in phosphatebuffered solution at 37°C. The degraded films were characterized using gravimetry (%water uptake and %weight loss), 1H-NMR spectroscopy, differential scanning calorimetry and size exclusion chromatography. The %weight loss of the degraded films increased and molecular weight decreased on increasing the MPEG block length and incorporating the G and CL units, according to their %water uptakes. The MPEG content of the degraded film decreased and the Tg increased with hydrolytic degradation time.

Research on Preparation Technology for Machinable Ceramics

2014 ◽  
Vol 804 ◽  
pp. 203-206
Author(s):  
Hao Zhang ◽  
Yan Xu ◽  
Hai Yun Jin ◽  
Guan Jun Qiao
Keyword(s):  
Heat Treatment ◽  
Growth Rate ◽  
Phase Composition ◽  
Crystallization Temperature ◽  
Treatment Process ◽  
Glass Ceramics ◽  
Heat Treatment Process ◽  
Preparation Technology ◽  
The Relationship ◽  
Sintering Method

In this paper, the compact SiO2-B2O3-Al2O3-MgO-F machinable ceramics were prepared through melt-cast and sintering method. The phase composition and microstructure of the ceramics were analyzed and observed using XRD and SEM, and the relationship between processing and microstructure were discussed. The results showed that, after the heat treatment, the main phase of the ceramics changed from fluorophlogopite (mica like) to fluoramphibole (rod like). When the crystallization temperature at 950°C, the nuclei growth rate of the mica glass-ceramics was higher. Meanwhile, a small quantity of forsterite (Mg2SiO4) was also crystallized out in the process. The best heat treatment process was nucleated at 630°C for 2h and crystallized at 950°C for 2h.

PMAA-based RAFT dispersion polymerization of MMA in ethanol: conductivity, block length and self-assembly

RSC Advances ◽  
2016 ◽  
Vol 6 (63) ◽  
pp. 58218-58225 ◽  
Author(s):  
Henmei Ni ◽  
Junxiu Liu ◽  
Kai Shi ◽  
Min Wu ◽  
Yadong Yang ◽  
...  
Keyword(s):  
Electrostatic Interaction ◽  
Self Assembly ◽  
Dispersion Polymerization ◽  
Diblock Copolymers ◽  
Block Length ◽  
Amphiphilic Diblock Copolymers ◽  
Positively Charged

Soluble amphiphilic diblock copolymers of PMAA-b-PMMA were positively charged in ethanol and the electrostatic interaction played a role in the process of self-assembly.

Thermally induced morphological transition from lamella to gyroid in a binary blend of diblock copolymers

1998 ◽  
Vol 108 (10) ◽  
pp. 4333-4339 ◽  
Author(s):  
Shinichi Sakurai ◽  
Hideo Umeda ◽  
Chizuko Furukawa ◽  
Hiroshi Irie ◽  
Shunji Nomura ◽  
...  
Keyword(s):  
Diblock Copolymers ◽  
Morphological Transition ◽  
Binary Blend ◽  
Thermally Induced
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