Among cellulose, poly (vinyl chloride), nylon and natural rubber, the polymer in which the intermolecular force of attraction is weakest is

Options

A. Nylon 2-nylon 6 is a polyamide copolymer of alanine .
B. poly(vinyl chloride )
C. cellulose
D. natural rubber .

Explanation

To determine which polymer among cellulose, poly(vinyl chloride), nylon, and natural rubber has the weakest intermolecular forces of attraction, we can analyze the structure and properties of each polymer.

### Step 1: Understand the structure of each polymer.
- **Cellulose**: A polysaccharide made up of glucose units linked by β(1→4) glycosidic bonds. It has strong hydrogen bonding between chains.
- **Poly(vinyl chloride) (PVC)**: A synthetic polymer made from the polymerization of vinyl chloride. It has polar C-Cl bonds, leading to dipole-dipole interactions.
- **Nylon**: A synthetic polyamide that contains amide linkages (–CONH–) which can form hydrogen bonds, resulting in stronger intermolecular forces.
- **Natural Rubber**: A polymer of isoprene (cis-1,4-polyisoprene) that consists mainly of carbon and hydrogen. It has a flexible structure and primarily exhibits weak Van der Waals forces due to its non-polar nature.

### Step 2: Compare the intermolecular forces.
- **Cellulose** has strong hydrogen bonds due to the presence of hydroxyl (-OH) groups.
- **PVC** has dipole-dipole interactions due to the polar C-Cl bonds.
- **Nylon** has strong hydrogen bonding due to the amide groups.
- **Natural Rubber** has weak Van der Waals forces because it is primarily non-polar and consists of carbon and hydrogen atoms only.

### Step 3: Identify the polymer with the weakest intermolecular forces.
Among the four polymers:
- **Natural Rubber** has the weakest intermolecular forces due to its non-polar nature and reliance on weak Van der Waals forces, while the others have stronger interactions due to polar bonds and hydrogen bonding.

### Conclusion:
The polymer with the weakest intermolecular force of attraction among cellulose, poly(vinyl chloride), nylon, and natural rubber is **natural rubber**.

### Final Answer:
**Natural Rubber**

---