Effects of Processing Conditions and Plasticizing-Reinforcing Modification on the Crystallization and Physical Properties of PLA Films

The polylactic acid (PLA) resin Ingeo 4032D was selected as the research object. Epoxy soybean oil (ESO) and zeolite (3A molecular sieve) were used as plasticizer and reinforcing filler, respectively, for PLA blend modification. The mixture was granulated in an extruder and then blown to obtain films under different conditions to determine the optimum processing temperatures and screw rotation. Then, the thermal behaviour, crystallinity, optical transparency, micro phase structure and physical properties of the film were investigated. The results showed that with increasing zeolite content, the crystallization behaviour of PLA changed, and the haze of the film increased from 5% to 40% compared to the pure PLA film. Zeolite and ESO dispersed in the PLA matrix played a role in toughening and strengthening. The PLA/8 wt% zeolite/3 wt% ESO film had the highest longitudinal tensile strength at 77 MPa. The PLA/2 wt% zeolite/3 wt% ESO film had the highest longitudinal elongation at 13%. The physical properties depended heavily on the dispersion of zeolite and ESO in the matrix.

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Effects of Particle Size and Distribution on the Microstructure and Mechanical Properties of SiC Reinforced Al-30Si Alloy Composite

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.271-272.12 ◽

2012 ◽

Vol 271-272 ◽

pp. 12-16 ◽

Cited By ~ 1

Author(s):

Zeng Lei Ni ◽

Ai Qin Wang ◽

Jing Pei Xie

Keyword(s):

Mechanical Properties ◽

Particle Size ◽

Tensile Strength ◽

Physical Properties ◽

Combined Effects ◽

Alloy Composite ◽

Microstructure And Mechanical Properties ◽

Sic Particles ◽

The Matrix ◽

Sic Particle

This paper studied the combined effects of particle size and distribution on the mechanical properties of the SiC particle reinforced Al-30Si alloy composites. The microstructure of experimental material was analyzed by SEM, the tensile strength and physical properties were examined. The results show that, with the increase of the SiC particle size in the composites, the clustering degree of the SiC particles decreases in the matrix, the SiC particles distribute more ununiformly. The tensile strength is influenced by the SiC particle size, the tensile strength of the composite reinforced by 13μm sized SiC particles is the highest.

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Combination of silk fabric and natural rubber for the development of green composites: Influence of curing on mechanical and thermal properties

Polymers and Polymer Composites ◽

10.1177/09673911211049103 ◽

2021 ◽

pp. 096739112110491

Author(s):

Thanuj Kumar M ◽

Sanga Shetty S G ◽

Ekwipoo Kalkornsurapranee ◽

Ladawan Songtipya ◽

Yeampon Nakaramontri ◽

...

Keyword(s):

Thermal Stability ◽

Tensile Strength ◽

Natural Rubber ◽

Physical Properties ◽

Tensile Properties ◽

Mechanical And Thermal Properties ◽

Relaxation Techniques ◽

Silk Fabric ◽

The Matrix ◽

The Stability

Unmodified natural rubber is not suitable for any elstomeric applications. Therefore, it is appropriate to modify natural rubber chemically to enhance the stability, which can be termed as vulcanization. Incorporation of fibers/fabrics is a common method to increase the stability of natural rubber along with chemical modification. Natural rubber-based composites have been prepared by the addition of silk fabric into natural rubber. The matrix material for the composite is glutaraldehyde cured natural rubber. Silk is an ecofriendly and biodegradable material with excellent tensile strength. When such kind of fabric is introduced into the vulcanized rubber as the matrix, all the physical properties were found to be enhanced considerably. Tensile properties in terms of ultimate tensile strength, elongation at break, and modulus of elasticity are measured for the composites of natural rubber/silk fabric at various glutaraldehyde concentrations. Thermogravimetric analysis and temperature scanning stress relaxation techniques are employed to evaluate the thermal stability of the resulting composites. Effects of glutaraldehyde addition on the physical properties of the composite were studied in detail. Considerable enhancement in the stability of natural rubber in terms of tensile properties, thermal stability, and solvent resistance is noticed up on the incorporation of silk fabric as well as glutaraldehyde curing.

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Morphology of High-Performance Rigid-Rod Polymer Fibers and Molecular Composites

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010015366x ◽

1989 ◽

Vol 47 ◽

pp. 338-339

Author(s):

W.W. Adams ◽

S. J. Krause

Keyword(s):

Tensile Strength ◽

High Performance ◽

Liquid Crystalline ◽

Molecular Level ◽

Synergistic Effects ◽

Tensile Modulus ◽

Commercial Development ◽

The Matrix ◽

Molecular Composites ◽

Rigid Rod

Rigid-rod polymers such as PBO, poly(paraphenylene benzobisoxazole), Figure 1a, are now in commercial development for use as high-performance fibers and for reinforcement at the molecular level in molecular composites. Spinning of liquid crystalline polyphosphoric acid solutions of PBO, followed by washing, drying, and tension heat treatment produces fibers which have the following properties: density of 1.59 g/cm3; tensile strength of 820 kpsi; tensile modulus of 52 Mpsi; compressive strength of 50 kpsi; they are electrically insulating; they do not absorb moisture; and they are insensitive to radiation, including ultraviolet. Since the chain modulus of PBO is estimated to be 730 GPa, the high stiffness also affords the opportunity to reinforce a flexible coil polymer at the molecular level, in analogy to a chopped fiber reinforced composite. The objectives of the molecular composite concept are to eliminate the thermal expansion coefficient mismatch between the fiber and the matrix, as occurs in conventional composites, to eliminate the interface between the fiber and the matrix, and, hopefully, to obtain synergistic effects from the exceptional stiffness of the rigid-rod molecule. These expectations have been confirmed in the case of blending rigid-rod PBZT, poly(paraphenylene benzobisthiazole), Figure 1b, with stiff-chain ABPBI, poly 2,5(6) benzimidazole, Fig. 1c A film with 30% PBZT/70% ABPBI had tensile strength 190 kpsi and tensile modulus of 13 Mpsi when solution spun from a 3% methane sulfonic acid solution into a film. The modulus, as predicted by rule of mixtures, for a film with this composition and with planar isotropic orientation, should be 16 Mpsi. The experimental value is 80% of the theoretical value indicating that the concept of a molecular composite is valid.

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DURIMPHY

Alloy Digest ◽

10.31399/asm.ad.fe0140 ◽

2007 ◽

Vol 56 (2) ◽

Keyword(s):

Tensile Strength ◽

Corrosion Resistance ◽

Yield Strength ◽

Physical Properties ◽

Precipitation Hardening ◽

Heat Treating ◽

High Yield ◽

High Yield Strength ◽

Precision Alloys ◽

Very High

Abstract Durimphy is a maraging steel with 1724 MPa (250 ksi) tensile strength and a very high yield strength due to precipitation hardening. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: FE-140. Producer or source: Metalimphy Precision Alloys.

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CENTRI-CAST GRAY IRON 50

Alloy Digest ◽

10.31399/asm.ad.ci0051 ◽

1981 ◽

Vol 30 (8) ◽

Keyword(s):

Tensile Strength ◽

Shear Strength ◽

Physical Properties ◽

Machine Tools ◽

Heat Treating ◽

Gray Iron ◽

Centrifugally Cast ◽

Wide Range ◽

Nominal Tensile Strength ◽

Cast Gray Iron

Abstract CENTRI-CAST GRAY IRON 50 is a centrifugally cast gray iron with a nominal tensile strength of 50,000 psi. It is cast in the form of tubing which has a wide range of uses in applications where size and shape are of paramount importance and freedom from pattern cost is an important consideration. Among its many applications are farm machinery, seals, bushings, machine tools and general machinery uses. This datasheet provides information on composition, physical properties, microstructure, hardness, elasticity, tensile properties, and compressive and shear strength as well as fatigue. It also includes information on casting, heat treating, machining, and surface treatment. Filing Code: CI-51. Producer or source: Federal Bronze Products Inc..

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CENTRI-CAST GRAY IRON 55

Alloy Digest ◽

10.31399/asm.ad.ci0048 ◽

1979 ◽

Vol 28 (9) ◽

Keyword(s):

Tensile Strength ◽

Shear Strength ◽

Physical Properties ◽

Surface Treatment ◽

Heat Treating ◽

Gray Iron ◽

Centrifugally Cast ◽

Wide Range ◽

Nominal Tensile Strength ◽

Cast Gray Iron

Abstract CENTRI-CAST GRAY IRON 55 is a centrifugally cast gray iron with a nominal tensile strength of 55,000 psi. It is produced in the form of tubing which has a wide range of uses in applications where size and shape are of paramount importance and freedom from pattern cost is an important consideration. Typical applications are seals, bushings, farm machinery, casings and general machinery uses. This datasheet provides information on composition, physical properties, microstructure, hardness, elasticity, tensile properties, and compressive and shear strength as well as fatigue. It also includes information on casting, heat treating, machining, and surface treatment. Filing Code: CI-48. Producer or source: Federal Bronze Products Inc..

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WIELAND-FX9

Alloy Digest ◽

10.31399/asm.ad.cu0801 ◽

2011 ◽

Vol 60 (8) ◽

Keyword(s):

Tensile Strength ◽

Corrosion Resistance ◽

Physical Properties ◽

Tensile Properties ◽

Cold Work ◽

Heat Treating ◽

High Manganese ◽

Bronze Alloy ◽

Good Strength

Abstract Wieland-FX9 is a high-manganese bronze alloy that has good strength and is available in numerous cold work tempers related to its minimum tensile strength. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: Cu-801. Producer or source: Wieland Metals Inc..

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DOGAL 600 and 800 DP

Alloy Digest ◽

10.31399/asm.ad.cs0160 ◽

2010 ◽

Vol 59 (12) ◽

Keyword(s):

Tensile Strength ◽

Physical Properties ◽

Surface Treatment ◽

Tensile Properties ◽

High Strength Steels ◽

High Strength

Abstract Dogal 600 and 800 DP are high-strength steels with a microstructure that contains ferrite, which is soft and formable, and martensite, which is hard and contributes to the strength of the steel. The designation relates to the lowest tensile strength. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on forming, joining, and surface treatment. Filing Code: CS-160. Producer or source: SSAB Swedish Steel Inc. and SSAB Swedish Steel.

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COLMONOY 805

Alloy Digest ◽

10.31399/asm.ad.ni0233 ◽

1998 ◽

Vol 47 (12) ◽

Keyword(s):

Corrosion Resistance ◽

Physical Properties ◽

Abrasion Resistance ◽

Coarse Particles ◽

Powder Metal ◽

Chromium Boride ◽

Nickel Chromium ◽

The Matrix

Abstract Colmonoy 805 is a nickel-chromium-boron alloy with coarse particles of chromium boride added to give it excellent sliding-type abrasion resistance. The alloy contains chromium boride in the matrix as large added particles. It is supplied only as a crushed powder for application with Colmonoy’s Fuseweld process. This datasheet provides information on composition, physical properties, microstructure, and elasticity. It also includes information on corrosion resistance as well as joining and powder metal forms.Filing Code: Ni-233. Producer or source: Wall Colmonoy Corporation. Originally published September 1976, revised December 1998.

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LUCEFIN GROUP C30 (1.0528), C30E (1.1178), C30R (1.1179)

Alloy Digest ◽

10.31399/asm.ad.cs0206 ◽

2020 ◽

Vol 69 (9) ◽

Keyword(s):

Tensile Strength ◽

Physical Properties ◽

Tensile Properties ◽

Heat Treating ◽

High Tensile Strength ◽

Medium Carbon ◽

Alloy Steels ◽

Cold Worked ◽

Lower Carbon

Abstract Lucefin Group C30, C30E, and C30R are medium-carbon, non-alloy steels that are used in the normalized, cold worked, or quenched and tempered condition. C30E and C30R may also be flame or induction hardened. C30, C30E, and C30R are widely used for small, moderately stressed parts, where higher strength levels are needed than can be achieved in the lower carbon grades, and also where toughness is more important than high tensile strength. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, and joining. Filing Code: CS-206. Producer or source: Lucefin S.p.A.

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