Learning Path
Question & Answer1
Understand Question2
Review Options3
Learn Explanation4
Explore TopicChoose the Best Answer
A
HDPE has a more linear structure, allowing for closer packing of molecules
B
LDPE has more cross-linking, which weakens the material
C
HDPE is made from different monomers than LDPE
D
LDPE is always produced at higher temperatures than HDPE
Understanding the Answer
Let's break down why this is correct
Answer
High‑density polyethylene (HDPE) has straight, tightly packed chains because it has very little branching, so the molecules can line up and crystallize more effectively. This crystallinity creates strong intermolecular forces that resist pulling apart the material. Low‑density polyethylene (LDPE) has many branches that push chains apart, making the material more amorphous and less able to hold forces together. As a result, HDPE can bear heavier loads and is used for pipes, while LDPE, with its flexible, weaker structure, is good for plastic bags. In short, the straight, tightly packed chains of HDPE give it a higher tensile strength than the branched, loosely packed chains of LDPE.
Detailed Explanation
HDPE chains are straight and have very few branches. Other options are incorrect because Cross‑linking is a different process that joins chains together, but LDPE does not have extra cross‑links; it has more branches; Both HDPE and LDPE come from the same monomer, ethylene, so the chemical building blocks are identical.
Key Concepts
Polymer Structure
Material Properties
Polymer Chemistry
Topic
Polymer Morphology
Difficulty
hard level question
Cognitive Level
understand
Practice Similar Questions
Test your understanding with related questions
1
Question 1A: High Density Polyethylene (HDPE) :: B: Low Density Polyethylene (LDPE) :: C: Rigid Structure ?
mediumChemistry
Practice
2
Question 2Polymer morphology significantly influences the properties of polymers like polyethylene. High-density polyethylene (HDPE) is characterized by its __________ structure, which contributes to its strength and rigidity compared to low-density polyethylene (LDPE).
easyChemistry
Practice
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