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The Effect of Construction and Demolition Waste Plastic Fractions on Wood-Polymer Composite Properties

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Optimization of processing variables in wood-rubber composite panel manufacturing technology.

Zhao Jun¹, Wang Xiang-Ming, Chang Jian-Min

¹Beijing Forestry University, College of Material Science and Technology, 35 Qinghua East Road, Haidian District, Beijing 100083, China. zhaojun200411@yahoo.com.cn <zhaojun200411@yahoo.com.cn>

Bioresource Technology

|July 3, 2007

Summary

This study explored wood-rubber composite panels using PMDI and UF binders. Optimal manufacturing involves specific board density, pressing time, and temperature for enhanced mechanical properties.

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Area of Science:

Materials Science
Composite Materials Engineering

Background:

Wood-rubber composite panels offer sustainable material alternatives.
Investigating novel binder systems like polymeric methylene diphenyl diisocyanate (PMDI) and urea-formaldehyde (UF) is crucial for improving panel performance.

Purpose of the Study:

To assess the feasibility of manufacturing wood-rubber composite panels using a combined PMDI and UF binder system.
To elucidate the influence of board density, pressing time, and temperature on panel properties.

Main Methods:

Composite panels were manufactured using PMDI and UF binders.
Board performance was evaluated through internal bond (IB) strength, modulus of rupture (MOR), and modulus of elasticity (MOE) tests.
Response surface methodology (RSM) was employed for statistical analysis and model development.

Main Results:

Board density and interactions between pressing variables significantly impacted mechanical properties.
Mathematical models were developed to predict MOR, MOE, and IB.
Optimal conditions identified: 170°C pressing temperature, 300s pressing time, and 1000 g/cm³ board density.

Conclusions:

The PMDI and UF binder system is feasible for producing functional wood-rubber composite panels.
Optimized manufacturing parameters are essential for achieving desired mechanical properties in composite panels.