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One is to incorporate biodegradable synthetic materials, such as polyactide, polyester and polycaprolactone into the films.
However, given the high cost of these materials, their use is limited.
Thus, the alternative way is to use abundant, natural materials, since, unlike latter polymers, they renewable [2].
Method/Theory Materials.
Bhattacharya, Properties of blends of starch and synthetic polymers containing anhydride groups, Journal of Applied Polymer Science, 52 (1994) 617-628

Pogatscher, Effect of trace elements and prolonged natural aging (Sn), Materials & Design 107 (2016) 257-268
Liu, Influence of Sn on the precipitation and hardening response of natural aged Al-0.4Mg-1.0Si alloy artificial aged at different temperatures, Materials Science & Engineering A. 765 (2019) 138250
Zhao, Effect trace addition of Sn on the ageing behavior of Al-Mg-Si alloy with a different Mg/Si ratio, Materials 13 (2020) 913
Holmestad, Post-β˝phases and their influence on microstructure and hardness in 6xxx Al-Mg-Si alloys, Journal of Materials Science 41 (2006) 471-478
Birol, Effect of solution heat treatment on the age hardening capacity of dendritic and globular AlSi7Mg0.6 alloys, International Journal of Materials Research 101 (2010) 439-444

Eco-materials based on renewable resources have attracted growing attention.
Flax is one of the major natural materials with great potential of application in the composite field.
In this case the strength deterioration of the materials might be caused.
Acknowledgements This work Supported by Fund of Project of Tianjin Science and Technology Committee,China(No.043104711) and Fund of Project of Education Department of Liaoning Province, China(No.2006B013) References [1] A T Bullions, D Hoffman: Composites Science and Technology, Vol. 66(2006), p.102 [2] B L Michel, D Sophie: Polymer Degradation and Stability, Vol. 88(2005), p.80 [3] B Ergun, Y M Kemal:Construction and Building Materials, Vol. 21 (2007), p.1879 [4] M J John, S B Thomas:Carbohydrate Polymers, Vol. 71(2008), p. 343 [5] B Edwin, P Isabelle:Composites Science and Technology, Vol. 67(2007), p.462 [6] X S Huang, A Netravali:Composites Science and Technology, Vol. 67(2007), p.2005 [7] M Baiardo, Z N Elisa:Applied Science and Manufacturing, Vol. 35(2004), p.703 [8] T Kawaguchi, A R Pearson:Composites Science and Technology, Vol. 64(2004), p.1991 [9] N Godin, S Huguet, R Gaertner:Composite Structures, Vol. 72(2006), p.79 [10] V A Alvarez, V Analia:Journal of Composite
Materials, Vol. 38(2004), p.1165 [11] I Krystyna, G Laurent:Composites Science and Technology, Vol. 64(2004), p.2271

First, important issues about the common materials for CubeSat and potentially 3D printing materials for CubeSats are addressed.
Therefore, suitable materials must be selected properly to meet these requirements.
Published material property data for selected materials [14, 38].
In 3D printing, there is at least 20% of waste materials due to the raft and support materials.
Series: Materials Science and Engineering 608 (2019)

Phase-pure α-TCP powder was milled using a high-energy planetary mill to obtain a partially X-ray amorphous material.
Materials and Methods Sample Preparation: Phase-pure α-TCP was prepared in a solid-state reaction from CaCO3 and CaHPO4 at 1350 °C.
At a temperature of 450 °C it was possible to fully recrystallize the material within 2.5 hours.
The crystal structure of pure b-Ca3(PO4)2, Journal of Solid State Chemistry, 10 (1974) p. 232-248
Bohner, Thermal treatment of flame-synthesized amorphous tricalcium phosphate nanoparticles, Journal of the American Ceramic Society, 93(10) (2010) p. 3455-3463

Materials & Methods The object of research is dry tailings after ores enrichment of the "Solton - Sary" deposit in Kyrgyzstan.
As the valuable ore materials chalcopyrite, faded ores and particles of free native gold were observed.
Kolotushkin, The technology of extracting gold from gold-bearing technogenic raw materials, 1(2018) [4] V.S.
Increase in the extraction of gold based on the joint processing of ore and waste, Journal of mining science, 2 (2017) [10] L.A.
Changes of technological properties of technogenic raw materials in the process of storage, J. min., 3. (2000)

Minimum Reinforcement Ratio of Concrete Beams Reinforced with FRP Bars Chunxia Li 1, a, SHilin Yan 1,b 1 School of Science, Wuhan University of Technology, Wuhan, Hubei province, PRC adingli95@126.com, byanshl@whut.edu.cn Keywords: Minimum Reinforcement Ratio, FRP Bars, cracking moment, FRP rupture Abstract.
It is noticed that the minimum reinforcement ration is associated with the material properties, and proportional to the ratio of tensile strength of the concrete to design tensile strength of FRP bars.
Conclusion The minimum reinforcement ration is associated with the material properties, and proportional to the ratio of tensile strength of the concrete to design tensile strength of FRP bars.
Acknowledgment This research is supported by National Science foundation of PRC (51073125).
Journal of Wuhan university of technology, Vol. 30, pp.53-57 (2008) (in Chinese)

[4] Caixia Shi, Guoguang Cheng, Zhanjun Li, Pei Zhao: Journal of Iron and Steel Research, International, Vol.15 (2008), p.57
[6] G M Sim, J C Ahn, S C Hong: Materials Science and Engineering A, Vol. 396 (2005) p. 159
[7] N Fujita, O K hmura, A Yamamoto: Materials Science and Engineering A, Vol. 351 (2003) p. 272

With the rapid development of modern industry and science technology, the demand for surfactants is increasing.
Materials and methods 3.1 Experimental device Foam separation apparatus is shown in Figure 1; the foam separation column is made by plexiglass, 1200 mm high, with inner diameter of 50 mm, and outer diameter of 60 mm.
Fig. 1 Schematic diagram of experimental Apparatus 1 Air pump 2 Humidifer 3 Buffer 4 Rotameter 5 Outlet 6 Distributor 7 Foam fractionation tower 8 Foam collector 3.2 Materials CTAB, analytical reagent, Tianjin Institute of Fine Chemicals Division; 752 UV-Vis spectrophotometer, Shanghai Precision & Scientific Instrument Co., Ltd.; LZB-3 rotameter, Shenyang North Star Flow Meter Factory; AC0-318 electromagnetic air compressor machines, Guangdong Haley Group Co., Ltd. 3.3 Experimental Methods Put CTAB wastewater into foam separation column by a peristaltic pump continuously, adjust the flow rate in the column to maintain a certain duration; using the wastewater pump, ventilate air into the solution, adjust the flow by rotor meter, and bubbles are generated by the gas distributor the bottom.
Shi: Journal of East China University of Science and Technology.

Introduction Metal-organic polymeric frameworks containing metal ions and organic bridging ligands have developed in recent years due to their particular beauty and intriguing architectural diversity and crystal packing motifs along with potential applications as functional materials [1, 2].
16) O(6)-Mn(1)-Mn(1)#1 134.37(17) O(1)#2-Mn(1)-Mn(1)#1 100.17(12) O(1)-Mn(1)-Mn(1)#1 100.17(12) C(1)-O(1)-Mn(1) 117.0(3) Mn(1)#1-O(5)-Mn(1) 100.9(2) Mn(1)#1-O(5)-H(5A) 111.6 Mn(1)-O(5)-H(5A) 111.6 Mn(1)-O(6)-H(6C) 125.3 C(2)#2-N(1)-C(2) 123.1(6) C(2)#2-N(1)-Mn(1) 118.3(3) C(2)-N(1)-Mn(1) 118.3(3) O(2)-C(1)-O(1) 126.2(6) O(2)-C(1)-C(2) 118.9(6) O(1)-C(1)-C(2) 114.9(5) N(1)-C(2)-C(3) 119.6(5) N(1)-C(2)-C(1) 111.2(5) C(3)-C(2)-C(1) 129.2(5) _____________________________________________________________ Acknowledgments This study were supported by the Natural Science
ZR2010BL025), Open Project of State Key Laboratory of Supramolecular Structure and Materials (No. sklssm201323)(Jilin University), State Key Laboratory of Inorganic Synthesis and Preparative Chemistry (No. 2011-13)(Jilin University).
[6] Chauhan Jayprakash S, Pandya Ajit V, International Journal of Engineering Science Invention, 2(2013), 36-43 [7].