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Kodchakorn Bokam Nutnaree Tamprateep Patcharaporn Chalopagorn

Introduction

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Para Rubber Taxonomic C l a ssification Class : Angiospermae Subclass : Dicotyledoneae Order : Euphorbiales Family : Euphorbiaceae Genus : Hevea Species : brasiliensis Scientific name : Hevea brasiliensis Muell Arg. Common name : Para Rubber

HDPE is the high density version of PE plastic . Because it has little branching , giving it stronger intermolecular forces and tensile strength than lower density polyethylene . So It is harder, stronger, more opaque and a little heavier than LDPE, but less ductile . HDPE

HDPE HDPE is lighter than water, and can be moulded and joined together HDPE is resistant to many different solvents and has a wide variety of applications

Objective To study about appropriate ratio to produce particle board from Para rubber wood flour, coconut flour, and recycled plastic.

- Advisors Mr.Sorachai Sae-lim Dr.Chanchai Thongpin Ass . Prof . Dr.Chakrit Sirisinha Acknowledge - The Thailand Research Fund , ( TRF ) - Young Scientist competition , ( YSC2008 )

Experiment 1. Production of wood plastic composites 2. Testing - Prepare material - Mixing & Molding composites Method -Impact test -Flexural test -Tensile test -Melt flow index 3. Fill coconut flour

1. Production of wood plastic composites

1.1 Preparing Materials

Dry at 75 degree to control moisture less than 5% Crush with grinder Use Screened wood flour > 200 mesh Recycled Plastic Para Wood Flour Preparing Materials

1.2 Mixing & Molding

Mixing & Molding Method Mix wood flour and recycled plastic by internal mixer Molding specimen by injection molding ASTM test

Ratio
Pure recycled plastic
10 % wood flour by weight

Result of molding
Pure recycled plastic
100 % Recycled plastic 10 % Wood 20 % Wood

2. Testing

ASTM standards used

Result : 2.1 Tensile Test 886.989 19.890 19.097 20% W ood 592.627 191.235 23.672 10% W ood 589.788 40.836 23.989 P ure Tensile Modulus (MPa) Tensile Elongation (%) Tensile Strength (MPa) Formula

Result : 2.2 Flexural Test 1.203 1.230 1.297 Flexural Strength (MPa) 3280.284 20% W ood 1678.083 10% W ood 1435.756 P ure Flexural Modulus (MPa) Formula

Result : 2.3 Impact Test

Result : 2.4 Melt index test 0.5732 ± 0.056 20 % Wood (g) 0.8790 ± 0.086 10 % Wood (g) 0.7478 ± 0.038 0 % Wood (g) Melt Index (g/10min) Formula

Result : 2.4 Melt index test

3. Fill coconut flour

Dry at 75 degree to control moisture less than 5% Coconut Flour Crush with grinder Preparing materials

Result : 3.1 Tensile Test 578.399 191.235 23.692 10% W ood 540.640 87.342 24.217 5%5% W ood- C oconut Tensile Modulus (MPa) Tensile Elongation (%) Tensile Strength (MPa) Formula

Result : 3.2 Flexural Test 1.157 2.293 Flexural Strength (MPa) 1095.891 5%5% W ood- C oconut 1609.318 10% W ood Flexural Modulus (MPa) Formula

Result : 3.3 Impact Test

Result : 3.4 Melt index test 0.8790 ± 0.086 10 % Wood (g) 0.6008 ± 0.077 5 % 5% Wood-Coconut (g) Melt Index (g/10min) Formula

Result : 3.4 Melt index test

เมื่อเพิ่มปริมาณขี้เลื่อยไม้ยางพารา
ความแข็งแรงดึง (Tensile Strength) มีแนวโน้ม ลดลง
ร้อยละการดึงยืด ณ จุดขาด (Tensile Elongation) มีแนวโน้ม ลดลง
มอดูลัส (Tensile Modulus) มีแนวโน้ม เพิ่มขึ้น
ความแข็งแรงโค้งงอ (Flexural Strength) มีแนวโน้ม ลดลง
มอดูลัสโค้งงอ (Flexural Modulus) มีแนวโน้ม สูงขึ้น
ความแข็งแรงกระแทก (Impact Strength) มีแนวโน้ม สูงขึ้น
ดัชนีการไหล (Melt Flow Index) มีแนวโน้ม ลดลง
Conclusion

เมื่อผสมขุยมะพร้าว
ความแข็งแรงดึง (Tensile Strength) มีแนวโน้ม เพิ่มขึ้น
ร้อยละการดึงยืด ณ จุดขาด (Tensile Elongation) มีแนวโน้ม ลดลง
มอดูลัส (Tensile Modulus) มีแนวโน้ม ลดลง
ความแข็งแรงโค้งงอ (Flexural Strength) มีแนวโน้ม เพิ่มขึ้น
มอดูลัสโค้งงอ (Flexural Modulus) มีแนวโน้ม ลดลง
ความแข็งแรงกระแทก (Impact Strength) มีแนวโน้ม สูงขึ้น
ดัชนีการไหล (Melt Flow Index) มีแนวโน้ม ลดลง
Conclusion

References Nicole M.Stark.1997 . Effect of Species and Particle Size on Properties of Wood- Flour-Filled Polypropylene Composites. USDA Forest Products Lab. 10-16 American Society for Testing and Materials. 2006. ASTM (online). Available : http://www.astm.org/ [5 January 2550] Craig Clemons. (2002). Wood-Plastic Composites in the United States . [Online].Available: http :// www.fpl.fs.fed.us / documnts /pdf2002/clemo02b.pdf Science Magazine . 2005 . Properties of high-density polyethylene using durian and rubber sawdusts as fillers. 23(2-3): 132-146

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